cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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share_config.h (1994B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
      4 */
      5
      6#ifndef __SHARE_CONFIG_MANAGEMENT_H__
      7#define __SHARE_CONFIG_MANAGEMENT_H__
      8
      9#include <linux/workqueue.h>
     10#include <linux/hashtable.h>
     11#include <linux/path.h>
     12
     13struct ksmbd_share_config {
     14	char			*name;
     15	char			*path;
     16
     17	unsigned int		path_sz;
     18	unsigned int		flags;
     19	struct list_head	veto_list;
     20
     21	struct path		vfs_path;
     22
     23	atomic_t		refcount;
     24	struct hlist_node	hlist;
     25	unsigned short		create_mask;
     26	unsigned short		directory_mask;
     27	unsigned short		force_create_mode;
     28	unsigned short		force_directory_mode;
     29	unsigned short		force_uid;
     30	unsigned short		force_gid;
     31};
     32
     33#define KSMBD_SHARE_INVALID_UID	((__u16)-1)
     34#define KSMBD_SHARE_INVALID_GID	((__u16)-1)
     35
     36static inline int share_config_create_mode(struct ksmbd_share_config *share,
     37					   umode_t posix_mode)
     38{
     39	if (!share->force_create_mode) {
     40		if (!posix_mode)
     41			return share->create_mask;
     42		else
     43			return posix_mode & share->create_mask;
     44	}
     45	return share->force_create_mode & share->create_mask;
     46}
     47
     48static inline int share_config_directory_mode(struct ksmbd_share_config *share,
     49					      umode_t posix_mode)
     50{
     51	if (!share->force_directory_mode) {
     52		if (!posix_mode)
     53			return share->directory_mask;
     54		else
     55			return posix_mode & share->directory_mask;
     56	}
     57
     58	return share->force_directory_mode & share->directory_mask;
     59}
     60
     61static inline int test_share_config_flag(struct ksmbd_share_config *share,
     62					 int flag)
     63{
     64	return share->flags & flag;
     65}
     66
     67void __ksmbd_share_config_put(struct ksmbd_share_config *share);
     68
     69static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
     70{
     71	if (!atomic_dec_and_test(&share->refcount))
     72		return;
     73	__ksmbd_share_config_put(share);
     74}
     75
     76struct ksmbd_share_config *ksmbd_share_config_get(char *name);
     77bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
     78			       const char *filename);
     79void ksmbd_share_configs_cleanup(void);
     80
     81#endif /* __SHARE_CONFIG_MANAGEMENT_H__ */