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639b6d79b8
This adds support to GFS2 for selinux extended attributes. There is a known bug in gfs2_ea_get() which is believed to be independant of this patch. Further patches will follow once that bug is fixed in order to make GFS2 use as much of the generic eattr infrastructure as possible. Signed-off-by: Ryan O'Hara <rohara@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
98 lines
3.1 KiB
C
98 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 v.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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#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(uint64_t) * (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(uint64_t) * 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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((uint64_t *)(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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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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