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TOMOYO Linux Cross Reference
Linux/fs/gfs2/xattr.h

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  1 /*
  2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
  4  *
  5  * This copyrighted material is made available to anyone wishing to use,
  6  * modify, copy, or redistribute it subject to the terms and conditions
  7  * of the GNU General Public License version 2.
  8  */
  9 
 10 #ifndef __EATTR_DOT_H__
 11 #define __EATTR_DOT_H__
 12 
 13 struct gfs2_inode;
 14 struct iattr;
 15 
 16 #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
 17 #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
 18 
 19 #define GFS2_EA_SIZE(ea) \
 20 ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
 21       ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
 22                                   (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
 23 
 24 #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
 25 #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
 26 
 27 #define GFS2_EAREQ_SIZE_STUFFED(er) \
 28 ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
 29 
 30 #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
 31 #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
 32 
 33 #define GFS2_EA2DATAPTRS(ea) \
 34 ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
 35 
 36 #define GFS2_EA2NEXT(ea) \
 37 ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
 38 
 39 #define GFS2_EA_BH2FIRST(bh) \
 40 ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
 41 
 42 struct gfs2_ea_request {
 43         const char *er_name;
 44         char *er_data;
 45         unsigned int er_name_len;
 46         unsigned int er_data_len;
 47         unsigned int er_type; /* GFS2_EATYPE_... */
 48 };
 49 
 50 struct gfs2_ea_location {
 51         struct buffer_head *el_bh;
 52         struct gfs2_ea_header *el_ea;
 53         struct gfs2_ea_header *el_prev;
 54 };
 55 
 56 extern int __gfs2_xattr_set(struct inode *inode, const char *name,
 57                             const void *value, size_t size,
 58                             int flags, int type);
 59 extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
 60 extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
 61 
 62 /* Exported to acl.c */
 63 
 64 extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
 65 extern int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data);
 66 
 67 #endif /* __EATTR_DOT_H__ */
 68 

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