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David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#ifndef __EATTR_DOT_H__
11#define __EATTR_DOT_H__
12
Steven Whitehousef2f7ba52006-09-05 10:39:21 -040013struct gfs2_inode;
14struct iattr;
15
David Teiglandb3b94fa2006-01-16 16:50:04 +000016#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) \
20ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
21 ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
Steven Whitehouse86d00632009-09-14 09:50:57 +010022 (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
David Teiglandb3b94fa2006-01-16 16:50:04 +000023
David Teiglandb3b94fa2006-01-16 16:50:04 +000024#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) \
28ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
29
David Teiglandb3b94fa2006-01-16 16:50:04 +000030#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) \
Al Virob44b84d2006-10-14 10:46:30 -040034((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
David Teiglandb3b94fa2006-01-16 16:50:04 +000035
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
David Teiglandb3b94fa2006-01-16 16:50:04 +000042struct gfs2_ea_request {
Steven Whitehousecca195c2006-09-05 13:15:18 -040043 const char *er_name;
David Teiglandb3b94fa2006-01-16 16:50:04 +000044 char *er_data;
45 unsigned int er_name_len;
46 unsigned int er_data_len;
47 unsigned int er_type; /* GFS2_EATYPE_... */
David Teiglandb3b94fa2006-01-16 16:50:04 +000048};
49
50struct 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
Steven Whitehouse40b78a32009-08-26 18:41:32 +010056extern int gfs2_xattr_get(struct inode *inode, int type, const char *name,
57 void *buffer, size_t size);
58extern int gfs2_xattr_set(struct inode *inode, int type, const char *name,
59 const void *value, size_t size, int flags);
60extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
61extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +000062
David Teiglandb3b94fa2006-01-16 16:50:04 +000063/* Exported to acl.c */
64
Steven Whitehouse40b78a32009-08-26 18:41:32 +010065extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
66 struct gfs2_ea_location *el);
67extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
68 char *data, size_t size);
69extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
70 struct iattr *attr, char *data);
Ryan O'Hara639b6d72006-05-22 10:08:35 -040071
David Teiglandb3b94fa2006-01-16 16:50:04 +000072#endif /* __EATTR_DOT_H__ */