1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_ATTR_SF_H__ 7 #define __XFS_ATTR_SF_H__ 8 9 /* 10 * We generate this then sort it, attr_list() must return things in hash-order. 11 */ 12 typedef struct xfs_attr_sf_sort { 13 uint8_t entno; /* entry number in original list */ 14 uint8_t namelen; /* length of name value (no null) */ 15 uint8_t valuelen; /* length of value */ 16 uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */ 17 xfs_dahash_t hash; /* this entry's hash value */ 18 unsigned char *name; /* name value, pointer into buffer */ 19 void *value; 20 } xfs_attr_sf_sort_t; 21 22 #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \ 23 ((1 << (NBBY*(int)sizeof(uint8_t))) - 1) 24 25 /* space name/value uses */ xfs_attr_sf_entsize_byname(uint8_t nlen,uint8_t vlen)26 static inline int xfs_attr_sf_entsize_byname(uint8_t nlen, uint8_t vlen) 27 { 28 return sizeof(struct xfs_attr_sf_entry) + nlen + vlen; 29 } 30 31 /* space an entry uses */ xfs_attr_sf_entsize(struct xfs_attr_sf_entry * sfep)32 static inline int xfs_attr_sf_entsize(struct xfs_attr_sf_entry *sfep) 33 { 34 return struct_size(sfep, nameval, sfep->namelen + sfep->valuelen); 35 } 36 37 /* first entry in the SF attr fork */ 38 static inline struct xfs_attr_sf_entry * xfs_attr_sf_firstentry(struct xfs_attr_sf_hdr * hdr)39 xfs_attr_sf_firstentry(struct xfs_attr_sf_hdr *hdr) 40 { 41 return (struct xfs_attr_sf_entry *)(hdr + 1); 42 } 43 44 /* next entry after sfep */ 45 static inline struct xfs_attr_sf_entry * xfs_attr_sf_nextentry(struct xfs_attr_sf_entry * sfep)46 xfs_attr_sf_nextentry(struct xfs_attr_sf_entry *sfep) 47 { 48 return (void *)sfep + xfs_attr_sf_entsize(sfep); 49 } 50 51 /* pointer to the space after the last entry, e.g. for adding a new one */ 52 static inline struct xfs_attr_sf_entry * xfs_attr_sf_endptr(struct xfs_attr_sf_hdr * sf)53 xfs_attr_sf_endptr(struct xfs_attr_sf_hdr *sf) 54 { 55 return (void *)sf + be16_to_cpu(sf->totsize); 56 } 57 58 #endif /* __XFS_ATTR_SF_H__ */ 59