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268b36116f
Embed them into container (struct debugfs_inode_info, with nothing else in it at the moment), set the cache up, etc. Just the infrastructure changes letting us augment debugfs inodes here; adding stuff will come at the next step. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20250112080705.141166-1-viro@zeniv.linux.org.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
1.8 KiB
C
69 lines
1.8 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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#include <linux/list.h>
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struct file_operations;
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struct debugfs_inode_info {
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struct inode vfs_inode;
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};
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static inline struct debugfs_inode_info *DEBUGFS_I(struct inode *inode)
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{
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return container_of(inode, struct debugfs_inode_info, vfs_inode);
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}
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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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extern const struct file_operations debugfs_full_short_proxy_file_operations;
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struct debugfs_fsdata {
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const struct file_operations *real_fops;
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const struct debugfs_short_fops *short_fops;
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union {
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/* automount_fn is used when real_fops is NULL */
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debugfs_automount_t automount;
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struct {
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refcount_t active_users;
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struct completion active_users_drained;
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/* protect cancellations */
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struct mutex cancellations_mtx;
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struct list_head cancellations;
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};
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};
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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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