diff options
Diffstat (limited to 'fs/cifs/cifsacl.h')
| -rw-r--r-- | fs/cifs/cifsacl.h | 51 |
1 files changed, 36 insertions, 15 deletions
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h index c4ae7d03656..4f388483526 100644 --- a/fs/cifs/cifsacl.h +++ b/fs/cifs/cifsacl.h @@ -23,11 +23,8 @@ #define _CIFSACL_H -#define NUM_AUTHS 6 /* number of authority fields */ -#define NUM_SUBAUTHS 5 /* number of sub authority fields */ -#define NUM_WK_SIDS 7 /* number of well known sids */ -#define SIDNAMELENGTH 20 /* long enough for the ones we care about */ -#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */ +#define NUM_AUTHS (6) /* number of authority fields */ +#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */ #define READ_BIT 0x4 #define WRITE_BIT 0x2 @@ -39,6 +36,35 @@ #define ACCESS_ALLOWED 0 #define ACCESS_DENIED 1 +#define SIDOWNER 1 +#define SIDGROUP 2 + +/* + * Security Descriptor length containing DACL with 3 ACEs (one each for + * owner, group and world). + */ +#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \ + sizeof(struct cifs_acl) + \ + (sizeof(struct cifs_ace) * 3)) + +/* + * Maximum size of a string representation of a SID: + * + * The fields are unsigned values in decimal. So: + * + * u8: max 3 bytes in decimal + * u32: max 10 bytes in decimal + * + * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator + * + * For authority field, max is when all 6 values are non-zero and it must be + * represented in hex. So "-0x" + 12 hex digits. + * + * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-') + */ +#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1) +#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */ + struct cifs_ntsd { __le16 revision; /* revision level */ __le16 type; @@ -51,10 +77,13 @@ struct cifs_ntsd { struct cifs_sid { __u8 revision; /* revision level */ __u8 num_subauth; - __u8 authority[6]; - __le32 sub_auth[5]; /* sub_auth[num_subauth] */ + __u8 authority[NUM_AUTHS]; + __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */ } __attribute__((packed)); +/* size of a struct cifs_sid, sans sub_auth array */ +#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS) + struct cifs_acl { __le16 revision; /* revision level */ __le16 size; @@ -69,12 +98,4 @@ struct cifs_ace { struct cifs_sid sid; /* ie UUID of user or group who gets these perms */ } __attribute__((packed)); -struct cifs_wksid { - struct cifs_sid cifssid; - char sidname[SIDNAMELENGTH]; -} __attribute__((packed)); - -extern int match_sid(struct cifs_sid *); -extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *); - #endif /* _CIFSACL_H */ |