mirror of https://gitee.com/openkylin/linux.git
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* internal.h - declarations internal to debugfs
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*
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* Copyright (C) 2016 Nicolai Stange <nicstange@gmail.com>
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*/
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#ifndef _DEBUGFS_INTERNAL_H_
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#define _DEBUGFS_INTERNAL_H_
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struct file_operations;
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/* declared over in file.c */
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extern const struct file_operations debugfs_noop_file_operations;
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extern const struct file_operations debugfs_open_proxy_file_operations;
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extern const struct file_operations debugfs_full_proxy_file_operations;
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struct debugfs_fsdata {
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const struct file_operations *real_fops;
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refcount_t active_users;
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struct completion active_users_drained;
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};
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/*
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* A dentry's ->d_fsdata either points to the real fops or to a
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* dynamically allocated debugfs_fsdata instance.
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* In order to distinguish between these two cases, a real fops
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* pointer gets its lowest bit set.
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*/
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#define DEBUGFS_FSDATA_IS_REAL_FOPS_BIT BIT(0)
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/* Access BITS */
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#define DEBUGFS_ALLOW_API BIT(0)
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#define DEBUGFS_ALLOW_MOUNT BIT(1)
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#ifdef CONFIG_DEBUG_FS_ALLOW_ALL
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#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_MOUNT | DEBUGFS_ALLOW_API)
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#endif
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#ifdef CONFIG_DEBUG_FS_DISALLOW_MOUNT
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#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_API)
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#endif
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#ifdef CONFIG_DEBUG_FS_ALLOW_NONE
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#define DEFAULT_DEBUGFS_ALLOW_BITS (0)
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#endif
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#endif /* _DEBUGFS_INTERNAL_H_ */
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