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/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#ifndef __EATTR_DOT_H__
#define __EATTR_DOT_H__
struct gfs2_inode;
struct iattr;
#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
#define GFS2_EA_SIZE(ea) \
ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
(sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
#define GFS2_EAREQ_SIZE_STUFFED(er) \
ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
#define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
sizeof(__be64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
#define GFS2_EA2DATAPTRS(ea) \
((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
#define GFS2_EA2NEXT(ea) \
((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
#define GFS2_EA_BH2FIRST(bh) \
((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
#define GFS2_ERF_MODE 0x80000000
struct gfs2_ea_request {
const char *er_name;
char *er_data;
unsigned int er_name_len;
unsigned int er_data_len;
unsigned int er_type; /* GFS2_EATYPE_... */
int er_flags;
mode_t er_mode;
};
struct gfs2_ea_location {
struct buffer_head *el_bh;
struct gfs2_ea_header *el_ea;
struct gfs2_ea_header *el_prev;
};
int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
int gfs2_ea_dealloc(struct gfs2_inode *ip);
/* Exported to acl.c */
int gfs2_ea_find(struct gfs2_inode *ip,
struct gfs2_ea_request *er,
struct gfs2_ea_location *el);
int gfs2_ea_get_copy(struct gfs2_inode *ip,
struct gfs2_ea_location *el,
char *data);
int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
struct iattr *attr, char *data);
static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
{
switch (ea->ea_type) {
case GFS2_EATYPE_USR:
return 5 + ea->ea_name_len + 1;
case GFS2_EATYPE_SYS:
return 7 + ea->ea_name_len + 1;
case GFS2_EATYPE_SECURITY:
return 9 + ea->ea_name_len + 1;
default:
return 0;
}
}
#endif /* __EATTR_DOT_H__ */
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