1 #ifndef XATTR_H 2 #define XATTR_H 3 /* 4 * Create a squashfs filesystem. This is a highly compressed read only 5 * filesystem. 6 * 7 * Copyright (c) 2010, 2012, 2013, 2014 8 * Phillip Lougher <phillip (at) squashfs.org.uk> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 2, 13 * or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23 * 24 * xattr.h 25 */ 26 27 #define XATTR_VALUE_OOL SQUASHFS_XATTR_VALUE_OOL 28 #define XATTR_PREFIX_MASK SQUASHFS_XATTR_PREFIX_MASK 29 30 #define XATTR_VALUE_OOL_SIZE sizeof(long long) 31 32 /* maximum size of xattr value data that will be inlined */ 33 #define XATTR_INLINE_MAX 128 34 35 /* the target size of an inode's xattr name:value list. If it 36 * exceeds this, then xattr value data will be successively out of lined 37 * until it meets the target */ 38 #define XATTR_TARGET_MAX 65536 39 40 #define IS_XATTR(a) (a != SQUASHFS_INVALID_XATTR) 41 42 struct xattr_list { 43 char *name; 44 char *full_name; 45 int size; 46 int vsize; 47 void *value; 48 int type; 49 long long ool_value; 50 unsigned short vchecksum; 51 struct xattr_list *vnext; 52 }; 53 54 struct dupl_id { 55 struct xattr_list *xattr_list; 56 int xattrs; 57 int xattr_id; 58 struct dupl_id *next; 59 }; 60 61 struct prefix { 62 char *prefix; 63 int type; 64 }; 65 66 extern int generate_xattrs(int, struct xattr_list *); 67 68 #ifdef XATTR_SUPPORT 69 extern int get_xattrs(int, struct squashfs_super_block *); 70 extern int read_xattrs(void *); 71 extern long long write_xattrs(); 72 extern void save_xattrs(); 73 extern void restore_xattrs(); 74 extern unsigned int xattr_bytes, total_xattr_bytes; 75 extern void write_xattr(char *, unsigned int); 76 extern int read_xattrs_from_disk(int, struct squashfs_super_block *); 77 extern struct xattr_list *get_xattr(int, unsigned int *, int); 78 extern void free_xattr(struct xattr_list *, int); 79 #else 80 static inline int get_xattrs(int fd, struct squashfs_super_block *sBlk) 81 { 82 if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) { 83 fprintf(stderr, "Xattrs in filesystem! These are not " 84 "supported on this version of Squashfs\n"); 85 return 0; 86 } else 87 return SQUASHFS_INVALID_BLK; 88 } 89 90 91 static inline int read_xattrs(void *dir_ent) 92 { 93 return SQUASHFS_INVALID_XATTR; 94 } 95 96 97 static inline long long write_xattrs() 98 { 99 return SQUASHFS_INVALID_BLK; 100 } 101 102 103 static inline void save_xattrs() 104 { 105 } 106 107 108 static inline void restore_xattrs() 109 { 110 } 111 112 113 static inline void write_xattr(char *pathname, unsigned int xattr) 114 { 115 } 116 117 118 static inline int read_xattrs_from_disk(int fd, struct squashfs_super_block *sBlk) 119 { 120 if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) { 121 fprintf(stderr, "Xattrs in filesystem! These are not " 122 "supported on this version of Squashfs\n"); 123 return 0; 124 } else 125 return SQUASHFS_INVALID_BLK; 126 } 127 128 129 static inline struct xattr_list *get_xattr(int i, unsigned int *count, int j) 130 { 131 return NULL; 132 } 133 #endif 134 135 #ifdef XATTR_SUPPORT 136 #ifdef XATTR_DEFAULT 137 #define NOXOPT_STR 138 #define XOPT_STR " (default)" 139 #define XATTR_DEF 0 140 #else 141 #define NOXOPT_STR " (default)" 142 #define XOPT_STR 143 #define XATTR_DEF 1 144 #endif 145 #else 146 #define NOXOPT_STR " (default)" 147 #define XOPT_STR " (unsupported)" 148 #define XATTR_DEF 1 149 #endif 150 #endif 151
