fs/smb/server/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 #include <linux/unicode.h>
  13
  14 struct ksmbd_share_config {
  15         char                    *name;
  16         char                    *path;
  17
  18         unsigned int            path_sz;
  19         unsigned int            flags;
  20         struct list_head        veto_list;
  21
  22         struct path             vfs_path;
  23
  24         atomic_t                refcount;
  25         struct hlist_node       hlist;
  26         unsigned short          create_mask;
  27         unsigned short          directory_mask;
  28         unsigned short          force_create_mode;
  29         unsigned short          force_directory_mode;
  30         unsigned short          force_uid;
  31         unsigned short          force_gid;
  32 };
  33
  34 #define KSMBD_SHARE_INVALID_UID ((__u16)-1)
  35 #define KSMBD_SHARE_INVALID_GID ((__u16)-1)
  36
  37 static inline int share_config_create_mode(struct ksmbd_share_config *share,
  38                                            umode_t posix_mode)
  39 {
  40         if (!share->force_create_mode) {
  41                 if (!posix_mode)
  42                         return share->create_mask;
  43                 else
  44                         return posix_mode & share->create_mask;
  45         }
  46         return share->force_create_mode & share->create_mask;
  47 }
  48
  49 static inline int share_config_directory_mode(struct ksmbd_share_config *share,
  50                                               umode_t posix_mode)
  51 {
  52         if (!share->force_directory_mode) {
  53                 if (!posix_mode)
  54                         return share->directory_mask;
  55                 else
  56                         return posix_mode & share->directory_mask;
  57         }
  58
  59         return share->force_directory_mode & share->directory_mask;
  60 }
  61
  62 static inline int test_share_config_flag(struct ksmbd_share_config *share,
  63                                          int flag)
  64 {
  65         return share->flags & flag;
  66 }
  67
  68 void ksmbd_share_config_del(struct ksmbd_share_config *share);
  69 void __ksmbd_share_config_put(struct ksmbd_share_config *share);
  70
  71 static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
  72 {
  73         if (!atomic_dec_and_test(&share->refcount))
  74                 return;
  75         __ksmbd_share_config_put(share);
  76 }
  77
  78 struct ksmbd_share_config *ksmbd_share_config_get(struct unicode_map *um,
  79                                                   const char *name);
  80 bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
  81                                const char *filename);
  82 #endif /* __SHARE_CONFIG_MANAGEMENT_H__ */