diff options
Diffstat (limited to 'fs/xfs/xfs_acl.h')
| -rw-r--r-- | fs/xfs/xfs_acl.h | 47 |
1 files changed, 30 insertions, 17 deletions
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h index 0135e2a669d..5dc16374451 100644 --- a/fs/xfs/xfs_acl.h +++ b/fs/xfs/xfs_acl.h @@ -22,19 +22,36 @@ struct inode; 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" @@ -42,20 +59,16 @@ struct xfs_acl { #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 int xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); extern int posix_acl_access_exists(struct inode *inode); extern int posix_acl_default_exists(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 -# define xfs_inherit_acl(inode, default_acl) 0 -# define xfs_acl_chmod(inode) 0 +static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type) +{ + return NULL; +} +# define xfs_set_acl NULL # define posix_acl_access_exists(inode) 0 # define posix_acl_default_exists(inode) 0 #endif /* CONFIG_XFS_POSIX_ACL */ |