struct posix_acl;
struct xfs_inode;
-#define XFS_ACL_MAX_ENTRIES 25
#define XFS_ACL_NOT_PRESENT (-1)
/* On-disk XFS access control list structure */
+struct xfs_acl_entry {
+ __be32 ae_tag;
+ __be32 ae_id;
+ __be16 ae_perm;
+ __be16 ae_pad; /* fill the implicit hole in the structure */
+};
+
struct xfs_acl {
- __be32 acl_cnt;
- struct xfs_acl_entry {
- __be32 ae_tag;
- __be32 ae_id;
- __be16 ae_perm;
- } acl_entry[XFS_ACL_MAX_ENTRIES];
+ __be32 acl_cnt;
+ struct xfs_acl_entry acl_entry[0];
};
+/*
+ * The number of ACL entries allowed is defined by the on-disk format.
+ * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is
+ * limited only by the maximum size of the xattr that stores the information.
+ */
+#define XFS_ACL_MAX_ENTRIES(mp) \
+ (xfs_sb_version_hascrc(&mp->m_sb) \
+ ? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
+ sizeof(struct xfs_acl_entry) \
+ : 25)
+
+#define XFS_ACL_MAX_SIZE(mp) \
+ (sizeof(struct xfs_acl) + \
+ sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
+
/* On-disk XFS extended attribute names */
#define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE"
#define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT"
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
#ifdef CONFIG_XFS_POSIX_ACL
-extern int xfs_check_acl(struct inode *inode, int mask);
extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
extern int xfs_acl_chmod(struct inode *inode);
extern const struct xattr_handler xfs_xattr_acl_access_handler;
extern const struct xattr_handler xfs_xattr_acl_default_handler;
#else
-# define xfs_check_acl NULL
-# define xfs_get_acl(inode, type) NULL
+static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
+{
+ return NULL;
+}
# define xfs_inherit_acl(inode, default_acl) 0
# define xfs_acl_chmod(inode) 0
# define posix_acl_access_exists(inode) 0