fs/ksmbd/mgmt/share_config.h

   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
  13 struct 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
  36 static 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
  48 static 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
  61 static inline int test_share_config_flag(struct ksmbd_share_config *share,
  62                                          int flag)
  63 {
  64         return share->flags & flag;
  65 }
  66
  67 void ksmbd_share_config_del(struct ksmbd_share_config *share);
  68 void __ksmbd_share_config_put(struct ksmbd_share_config *share);
  69
  70 static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
  71 {
  72         if (!atomic_dec_and_test(&share->refcount))
  73                 return;
  74         __ksmbd_share_config_put(share);
  75 }
  76
  77 struct ksmbd_share_config *ksmbd_share_config_get(char *name);
  78 bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
  79                                const char *filename);
  80 #endif /* __SHARE_CONFIG_MANAGEMENT_H__ */