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152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
#ifndef XATTR_H
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#define XATTR_H
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/*
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* Create a squashfs filesystem. This is a highly compressed read only
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* filesystem.
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*
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* Copyright (c) 2010, 2012, 2013, 2014, 2019
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* xattr.h
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*/
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#define XATTR_VALUE_OOL SQUASHFS_XATTR_VALUE_OOL
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#define XATTR_PREFIX_MASK SQUASHFS_XATTR_PREFIX_MASK
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#define XATTR_VALUE_OOL_SIZE sizeof(long long)
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/* maximum size of xattr value data that will be inlined */
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#define XATTR_INLINE_MAX 128
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/* the target size of an inode's xattr name:value list. If it
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* exceeds this, then xattr value data will be successively out of lined
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* until it meets the target */
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#define XATTR_TARGET_MAX 65536
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#define IS_XATTR(a) (a != SQUASHFS_INVALID_XATTR)
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struct xattr_list {
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char *name;
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char *full_name;
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int size;
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int vsize;
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void *value;
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int type;
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long long ool_value;
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unsigned short vchecksum;
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struct xattr_list *vnext;
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};
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struct dupl_id {
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struct xattr_list *xattr_list;
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int xattrs;
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int xattr_id;
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struct dupl_id *next;
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};
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struct prefix {
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char *prefix;
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int type;
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};
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extern int generate_xattrs(int, struct xattr_list *);
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#ifdef XATTR_SUPPORT
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extern int get_xattrs(int, struct squashfs_super_block *);
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extern int read_xattrs(void *);
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extern long long write_xattrs();
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extern void save_xattrs();
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extern void restore_xattrs();
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extern unsigned int xattr_bytes, total_xattr_bytes;
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extern int write_xattr(char *, unsigned int);
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extern int read_xattrs_from_disk(int, struct squashfs_super_block *, int, long long *);
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extern struct xattr_list *get_xattr(int, unsigned int *, int *);
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extern void free_xattr(struct xattr_list *, int);
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#else
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static inline int get_xattrs(int fd, struct squashfs_super_block *sBlk)
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{
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if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) {
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fprintf(stderr, "Xattrs in filesystem! These are not "
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"supported on this version of Squashfs\n");
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return 0;
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} else
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return SQUASHFS_INVALID_BLK;
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}
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static inline int read_xattrs(void *dir_ent)
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{
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return SQUASHFS_INVALID_XATTR;
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}
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static inline long long write_xattrs()
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{
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return SQUASHFS_INVALID_BLK;
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}
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static inline void save_xattrs()
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{
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}
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static inline void restore_xattrs()
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{
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}
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static inline int write_xattr(char *pathname, unsigned int xattr)
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{
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return 0;
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}
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static inline int read_xattrs_from_disk(int fd, struct squashfs_super_block *sBlk, int flag, long long *table_start)
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{
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if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) {
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fprintf(stderr, "Xattrs in filesystem! These are not "
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"supported on this version of Squashfs\n");
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return 0;
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} else
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return SQUASHFS_INVALID_BLK;
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}
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static inline struct xattr_list *get_xattr(int i, unsigned int *count, int j)
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{
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return NULL;
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}
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#endif
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#ifdef XATTR_SUPPORT
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#ifdef XATTR_DEFAULT
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#define NOXOPT_STR
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#define XOPT_STR " (default)"
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#define XATTR_DEF 0
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#else
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#define NOXOPT_STR " (default)"
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#define XOPT_STR
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#define XATTR_DEF 1
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#endif
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#else
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#define NOXOPT_STR " (default)"
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#define XOPT_STR " (unsupported)"
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#define XATTR_DEF 1
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#endif
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#endif
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