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2 * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
32 #ifndef __XFS_DIR2_SF_H__
33 #define __XFS_DIR2_SF_H__
36 * Directory layout when stored internal to an inode.
38 * Small directories are packed as tightly as possible so as to
39 * fit into the literal area of the inode.
46 struct xfs_dir2_block
;
52 * Maximum size of a shortform directory.
54 #define XFS_DIR2_SF_MAX_SIZE \
55 (XFS_DINODE_MAX_SIZE - (uint)sizeof(xfs_dinode_core_t) - \
56 (uint)sizeof(xfs_agino_t))
59 * Inode number stored as 8 8-bit values.
61 typedef struct { __uint8_t i
[8]; } xfs_dir2_ino8_t
;
63 #define XFS_DIR2_SF_GET_INO8_ARCH(di,arch) \
64 (xfs_ino_t)(DIRINO_GET_ARCH(&di,arch))
65 #define XFS_DIR2_SF_GET_INO8(di) \
66 XFS_DIR2_SF_GET_INO8_ARCH(di,ARCH_NOCONVERT)
69 * Inode number stored as 4 8-bit values.
70 * Works a lot of the time, when all the inode numbers in a directory
73 typedef struct { __uint8_t i
[4]; } xfs_dir2_ino4_t
;
74 #define XFS_DIR2_SF_GET_INO4_ARCH(di,arch) \
75 (xfs_ino_t)(DIRINO4_GET_ARCH(&di,arch))
76 #define XFS_DIR2_SF_GET_INO4(di) \
77 XFS_DIR2_SF_GET_INO4_ARCH(di,ARCH_NOCONVERT)
83 #define XFS_DIR2_MAX_SHORT_INUM ((xfs_ino_t)0xffffffffULL)
86 * Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t.
87 * Only need 16 bits, this is the byte offset into the single block form.
89 typedef struct { __uint8_t i
[2]; } xfs_dir2_sf_off_t
;
92 * The parent directory has a dedicated field, and the self-pointer must
93 * be calculated on the fly.
95 * Entries are packed toward the top as tightly as possible. The header
96 * and the elements must be bcopy()'d out into a work area to get correct
97 * alignment for the inode number fields.
99 typedef struct xfs_dir2_sf_hdr
{
100 __uint8_t count
; /* count of entries */
101 __uint8_t i8count
; /* count of 8-byte inode #s */
102 xfs_dir2_inou_t parent
; /* parent dir inode number */
105 typedef struct xfs_dir2_sf_entry
{
106 __uint8_t namelen
; /* actual name length */
107 xfs_dir2_sf_off_t offset
; /* saved offset */
108 __uint8_t name
[1]; /* name, variable size */
109 xfs_dir2_inou_t inumber
; /* inode number, var. offset */
110 } xfs_dir2_sf_entry_t
;
112 typedef struct xfs_dir2_sf
{
113 xfs_dir2_sf_hdr_t hdr
; /* shortform header */
114 xfs_dir2_sf_entry_t list
[1]; /* shortform entries */
117 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_HDR_SIZE)
118 int xfs_dir2_sf_hdr_size(int i8count
);
119 #define XFS_DIR2_SF_HDR_SIZE(i8count) xfs_dir2_sf_hdr_size(i8count)
121 #define XFS_DIR2_SF_HDR_SIZE(i8count) \
122 ((uint)sizeof(xfs_dir2_sf_hdr_t) - \
124 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
127 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_INUMBERP)
128 xfs_dir2_inou_t
*xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t
*sfep
);
129 #define XFS_DIR2_SF_INUMBERP(sfep) xfs_dir2_sf_inumberp(sfep)
131 #define XFS_DIR2_SF_INUMBERP(sfep) \
132 ((xfs_dir2_inou_t *)&(sfep)->name[(sfep)->namelen])
135 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_INUMBER)
136 xfs_intino_t
xfs_dir2_sf_get_inumber_arch(xfs_dir2_sf_t
*sfp
, xfs_dir2_inou_t
*from
,
138 #define XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, from, arch) \
139 xfs_dir2_sf_get_inumber_arch(sfp, from, arch)
142 #define XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, from, arch) \
143 ((sfp)->hdr.i8count == 0 ? \
144 (xfs_intino_t)XFS_DIR2_SF_GET_INO4_ARCH(*(from), arch) : \
145 (xfs_intino_t)XFS_DIR2_SF_GET_INO8_ARCH(*(from), arch))
148 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_INUMBER)
149 void xfs_dir2_sf_put_inumber_arch(xfs_dir2_sf_t
*sfp
, xfs_ino_t
*from
,
150 xfs_dir2_inou_t
*to
, xfs_arch_t arch
);
151 #define XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp,from,to,arch) \
152 xfs_dir2_sf_put_inumber_arch(sfp,from,to,arch)
154 #define XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp,from,to,arch) \
155 if ((sfp)->hdr.i8count == 0) { \
156 DIRINO4_COPY_ARCH(from,to,arch); \
158 DIRINO_COPY_ARCH(from,to,arch); \
162 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_OFFSET)
163 xfs_dir2_data_aoff_t
xfs_dir2_sf_get_offset_arch(xfs_dir2_sf_entry_t
*sfep
,
165 xfs_dir2_data_aoff_t
xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t
*sfep
);
166 #define XFS_DIR2_SF_GET_OFFSET_ARCH(sfep,arch) \
167 xfs_dir2_sf_get_offset_arch(sfep,arch)
169 #define XFS_DIR2_SF_GET_OFFSET_ARCH(sfep,arch) \
170 INT_GET_UNALIGNED_16_ARCH(&(sfep)->offset.i,arch)
173 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_OFFSET)
174 void xfs_dir2_sf_put_offset_arch(xfs_dir2_sf_entry_t
*sfep
,
175 xfs_dir2_data_aoff_t off
, xfs_arch_t arch
);
176 #define XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep,off,arch) \
177 xfs_dir2_sf_put_offset_arch(sfep,off,arch)
179 #define XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep,off,arch) \
180 INT_SET_UNALIGNED_16_ARCH(&(sfep)->offset.i,off,arch)
183 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYNAME)
184 int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t
*sfp
, int len
);
185 #define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) \
186 xfs_dir2_sf_entsize_byname(sfp,len)
188 #define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) /* space a name uses */ \
189 ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
190 ((sfp)->hdr.i8count == 0) * \
191 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
194 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYENTRY)
195 int xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t
*sfp
, xfs_dir2_sf_entry_t
*sfep
);
196 #define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) \
197 xfs_dir2_sf_entsize_byentry(sfp,sfep)
199 #define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) /* space an entry uses */ \
200 ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
201 ((sfp)->hdr.i8count == 0) * \
202 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
205 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_FIRSTENTRY)
206 xfs_dir2_sf_entry_t
*xfs_dir2_sf_firstentry(xfs_dir2_sf_t
*sfp
);
207 #define XFS_DIR2_SF_FIRSTENTRY(sfp) xfs_dir2_sf_firstentry(sfp)
209 #define XFS_DIR2_SF_FIRSTENTRY(sfp) /* first entry in struct */ \
210 ((xfs_dir2_sf_entry_t *) \
211 ((char *)(sfp) + XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)))
214 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_NEXTENTRY)
215 xfs_dir2_sf_entry_t
*xfs_dir2_sf_nextentry(xfs_dir2_sf_t
*sfp
,
216 xfs_dir2_sf_entry_t
*sfep
);
217 #define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) xfs_dir2_sf_nextentry(sfp,sfep)
219 #define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) /* next entry in struct */ \
220 ((xfs_dir2_sf_entry_t *) \
221 ((char *)(sfep) + XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)))
229 xfs_dir2_block_sfsize(struct xfs_inode
*dp
,
230 struct xfs_dir2_block
*block
,
231 xfs_dir2_sf_hdr_t
*sfhp
);
234 xfs_dir2_block_to_sf(struct xfs_da_args
*args
, struct xfs_dabuf
*bp
,
235 int size
, xfs_dir2_sf_hdr_t
*sfhp
);
238 xfs_dir2_sf_addname(struct xfs_da_args
*args
);
241 xfs_dir2_sf_create(struct xfs_da_args
*args
, xfs_ino_t pino
);
244 xfs_dir2_sf_getdents(struct xfs_inode
*dp
, struct uio
*uio
, int *eofp
,
245 struct xfs_dirent
*dbp
, xfs_dir2_put_t put
);
248 xfs_dir2_sf_lookup(struct xfs_da_args
*args
);
251 xfs_dir2_sf_removename(struct xfs_da_args
*args
);
254 xfs_dir2_sf_replace(struct xfs_da_args
*args
);
256 #endif /* __XFS_DIR2_SF_H__ */