101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#ifndef __EATTR_DOT_H__
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#define __EATTR_DOT_H__
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struct gfs2_inode;
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struct iattr;
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#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
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#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
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#define GFS2_EA_SIZE(ea) \
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ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
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((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
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(sizeof(u64) * (ea)->ea_num_ptrs)), 8)
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#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
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#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
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#define GFS2_EAREQ_SIZE_STUFFED(er) \
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ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
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#define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
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ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \
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sizeof(u64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)
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#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
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#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
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#define GFS2_EA2DATAPTRS(ea) \
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((u64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
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#define GFS2_EA2NEXT(ea) \
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((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
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#define GFS2_EA_BH2FIRST(bh) \
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((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
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#define GFS2_ERF_MODE 0x80000000
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struct gfs2_ea_request {
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const char *er_name;
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char *er_data;
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unsigned int er_name_len;
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unsigned int er_data_len;
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unsigned int er_type; /* GFS2_EATYPE_... */
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int er_flags;
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mode_t er_mode;
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};
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struct gfs2_ea_location {
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struct buffer_head *el_bh;
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struct gfs2_ea_header *el_ea;
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struct gfs2_ea_header *el_prev;
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};
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int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
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int gfs2_ea_dealloc(struct gfs2_inode *ip);
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/* Exported to acl.c */
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int gfs2_ea_find(struct gfs2_inode *ip,
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struct gfs2_ea_request *er,
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struct gfs2_ea_location *el);
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int gfs2_ea_get_copy(struct gfs2_inode *ip,
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struct gfs2_ea_location *el,
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char *data);
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int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
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struct iattr *attr, char *data);
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static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
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{
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switch (ea->ea_type) {
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case GFS2_EATYPE_USR:
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return 5 + ea->ea_name_len + 1;
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case GFS2_EATYPE_SYS:
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return 7 + ea->ea_name_len + 1;
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case GFS2_EATYPE_SECURITY:
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return 9 + ea->ea_name_len + 1;
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default:
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return 0;
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}
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}
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#endif /* __EATTR_DOT_H__ */
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