git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/acl.h

   1 #ifndef _BCACHEFS_ACL_H
   2 #define _BCACHEFS_ACL_H
   3
   4 #ifdef CONFIG_BCACHEFS_POSIX_ACL
   5
   6 #define BCH_ACL_VERSION 0x0001
   7
   8 typedef struct {
   9         __le16          e_tag;
  10         __le16          e_perm;
  11         __le32          e_id;
  12 } bch_acl_entry;
  13
  14 typedef struct {
  15         __le16          e_tag;
  16         __le16          e_perm;
  17 } bch_acl_entry_short;
  18
  19 typedef struct {
  20         __le32          a_version;
  21 } bch_acl_header;
  22
  23 static inline size_t bch2_acl_size(int count)
  24 {
  25         if (count <= 4) {
  26                 return sizeof(bch_acl_header) +
  27                        count * sizeof(bch_acl_entry_short);
  28         } else {
  29                 return sizeof(bch_acl_header) +
  30                        4 * sizeof(bch_acl_entry_short) +
  31                        (count - 4) * sizeof(bch_acl_entry);
  32         }
  33 }
  34
  35 static inline int bch2_acl_count(size_t size)
  36 {
  37         ssize_t s;
  38
  39         size -= sizeof(bch_acl_header);
  40         s = size - 4 * sizeof(bch_acl_entry_short);
  41         if (s < 0) {
  42                 if (size % sizeof(bch_acl_entry_short))
  43                         return -1;
  44                 return size / sizeof(bch_acl_entry_short);
  45         } else {
  46                 if (s % sizeof(bch_acl_entry))
  47                         return -1;
  48                 return s / sizeof(bch_acl_entry) + 4;
  49         }
  50 }
  51
  52 struct posix_acl;
  53
  54 extern struct posix_acl *bch2_get_acl(struct inode *, int);
  55 extern int bch2_set_acl(struct inode *, struct posix_acl *, int);
  56
  57 #else
  58
  59 static inline int bch2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
  60 {
  61         return 0;
  62 }
  63
  64 #endif /* CONFIG_BCACHEFS_POSIX_ACL */
  65
  66 #endif /* _BCACHEFS_ACL_H */