2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
25 #include "xfs_mount.h"
26 #include "xfs_inode.h"
27 #include "xfs_btree.h"
28 #include "xfs_ialloc.h"
29 #include "xfs_ialloc_btree.h"
30 #include "xfs_alloc.h"
31 #include "xfs_error.h"
32 #include "xfs_trace.h"
33 #include "xfs_cksum.h"
34 #include "xfs_trans.h"
38 xfs_inobt_get_minrecs(
39 struct xfs_btree_cur
*cur
,
42 return cur
->bc_mp
->m_inobt_mnr
[level
!= 0];
45 STATIC
struct xfs_btree_cur
*
47 struct xfs_btree_cur
*cur
)
49 return xfs_inobt_init_cursor(cur
->bc_mp
, cur
->bc_tp
,
50 cur
->bc_private
.a
.agbp
, cur
->bc_private
.a
.agno
,
56 struct xfs_btree_cur
*cur
,
57 union xfs_btree_ptr
*nptr
,
58 int inc
) /* level change */
60 struct xfs_buf
*agbp
= cur
->bc_private
.a
.agbp
;
61 struct xfs_agi
*agi
= XFS_BUF_TO_AGI(agbp
);
63 agi
->agi_root
= nptr
->s
;
64 be32_add_cpu(&agi
->agi_level
, inc
);
65 xfs_ialloc_log_agi(cur
->bc_tp
, agbp
, XFS_AGI_ROOT
| XFS_AGI_LEVEL
);
70 struct xfs_btree_cur
*cur
,
71 union xfs_btree_ptr
*nptr
,
72 int inc
) /* level change */
74 struct xfs_buf
*agbp
= cur
->bc_private
.a
.agbp
;
75 struct xfs_agi
*agi
= XFS_BUF_TO_AGI(agbp
);
77 agi
->agi_free_root
= nptr
->s
;
78 be32_add_cpu(&agi
->agi_free_level
, inc
);
79 xfs_ialloc_log_agi(cur
->bc_tp
, agbp
,
80 XFS_AGI_FREE_ROOT
| XFS_AGI_FREE_LEVEL
);
84 xfs_inobt_alloc_block(
85 struct xfs_btree_cur
*cur
,
86 union xfs_btree_ptr
*start
,
87 union xfs_btree_ptr
*new,
90 xfs_alloc_arg_t args
; /* block allocation args */
91 int error
; /* error return value */
92 xfs_agblock_t sbno
= be32_to_cpu(start
->s
);
94 XFS_BTREE_TRACE_CURSOR(cur
, XBT_ENTRY
);
96 memset(&args
, 0, sizeof(args
));
99 args
.fsbno
= XFS_AGB_TO_FSB(args
.mp
, cur
->bc_private
.a
.agno
, sbno
);
103 args
.type
= XFS_ALLOCTYPE_NEAR_BNO
;
105 error
= xfs_alloc_vextent(&args
);
107 XFS_BTREE_TRACE_CURSOR(cur
, XBT_ERROR
);
110 if (args
.fsbno
== NULLFSBLOCK
) {
111 XFS_BTREE_TRACE_CURSOR(cur
, XBT_EXIT
);
115 ASSERT(args
.len
== 1);
116 XFS_BTREE_TRACE_CURSOR(cur
, XBT_EXIT
);
118 new->s
= cpu_to_be32(XFS_FSB_TO_AGBNO(args
.mp
, args
.fsbno
));
124 xfs_inobt_free_block(
125 struct xfs_btree_cur
*cur
,
131 fsbno
= XFS_DADDR_TO_FSB(cur
->bc_mp
, XFS_BUF_ADDR(bp
));
132 error
= xfs_free_extent(cur
->bc_tp
, fsbno
, 1);
136 xfs_trans_binval(cur
->bc_tp
, bp
);
141 xfs_inobt_get_maxrecs(
142 struct xfs_btree_cur
*cur
,
145 return cur
->bc_mp
->m_inobt_mxr
[level
!= 0];
149 xfs_inobt_init_key_from_rec(
150 union xfs_btree_key
*key
,
151 union xfs_btree_rec
*rec
)
153 key
->inobt
.ir_startino
= rec
->inobt
.ir_startino
;
157 xfs_inobt_init_rec_from_key(
158 union xfs_btree_key
*key
,
159 union xfs_btree_rec
*rec
)
161 rec
->inobt
.ir_startino
= key
->inobt
.ir_startino
;
165 xfs_inobt_init_rec_from_cur(
166 struct xfs_btree_cur
*cur
,
167 union xfs_btree_rec
*rec
)
169 rec
->inobt
.ir_startino
= cpu_to_be32(cur
->bc_rec
.i
.ir_startino
);
170 rec
->inobt
.ir_freecount
= cpu_to_be32(cur
->bc_rec
.i
.ir_freecount
);
171 rec
->inobt
.ir_free
= cpu_to_be64(cur
->bc_rec
.i
.ir_free
);
175 * initial value of ptr for lookup
178 xfs_inobt_init_ptr_from_cur(
179 struct xfs_btree_cur
*cur
,
180 union xfs_btree_ptr
*ptr
)
182 struct xfs_agi
*agi
= XFS_BUF_TO_AGI(cur
->bc_private
.a
.agbp
);
184 ASSERT(cur
->bc_private
.a
.agno
== be32_to_cpu(agi
->agi_seqno
));
186 ptr
->s
= agi
->agi_root
;
190 xfs_finobt_init_ptr_from_cur(
191 struct xfs_btree_cur
*cur
,
192 union xfs_btree_ptr
*ptr
)
194 struct xfs_agi
*agi
= XFS_BUF_TO_AGI(cur
->bc_private
.a
.agbp
);
196 ASSERT(cur
->bc_private
.a
.agno
== be32_to_cpu(agi
->agi_seqno
));
197 ptr
->s
= agi
->agi_free_root
;
202 struct xfs_btree_cur
*cur
,
203 union xfs_btree_key
*key
)
205 return (__int64_t
)be32_to_cpu(key
->inobt
.ir_startino
) -
206 cur
->bc_rec
.i
.ir_startino
;
213 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
214 struct xfs_btree_block
*block
= XFS_BUF_TO_BLOCK(bp
);
215 struct xfs_perag
*pag
= bp
->b_pag
;
219 * During growfs operations, we can't verify the exact owner as the
220 * perag is not fully initialised and hence not attached to the buffer.
222 * Similarly, during log recovery we will have a perag structure
223 * attached, but the agi information will not yet have been initialised
224 * from the on disk AGI. We don't currently use any of this information,
225 * but beware of the landmine (i.e. need to check pag->pagi_init) if we
228 switch (block
->bb_magic
) {
229 case cpu_to_be32(XFS_IBT_CRC_MAGIC
):
230 case cpu_to_be32(XFS_FIBT_CRC_MAGIC
):
231 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
233 if (!uuid_equal(&block
->bb_u
.s
.bb_uuid
, &mp
->m_sb
.sb_uuid
))
235 if (block
->bb_u
.s
.bb_blkno
!= cpu_to_be64(bp
->b_bn
))
238 be32_to_cpu(block
->bb_u
.s
.bb_owner
) != pag
->pag_agno
)
241 case cpu_to_be32(XFS_IBT_MAGIC
):
242 case cpu_to_be32(XFS_FIBT_MAGIC
):
248 /* numrecs and level verification */
249 level
= be16_to_cpu(block
->bb_level
);
250 if (level
>= mp
->m_in_maxlevels
)
252 if (be16_to_cpu(block
->bb_numrecs
) > mp
->m_inobt_mxr
[level
!= 0])
255 /* sibling pointer verification */
256 if (!block
->bb_u
.s
.bb_leftsib
||
257 (be32_to_cpu(block
->bb_u
.s
.bb_leftsib
) >= mp
->m_sb
.sb_agblocks
&&
258 block
->bb_u
.s
.bb_leftsib
!= cpu_to_be32(NULLAGBLOCK
)))
260 if (!block
->bb_u
.s
.bb_rightsib
||
261 (be32_to_cpu(block
->bb_u
.s
.bb_rightsib
) >= mp
->m_sb
.sb_agblocks
&&
262 block
->bb_u
.s
.bb_rightsib
!= cpu_to_be32(NULLAGBLOCK
)))
269 xfs_inobt_read_verify(
272 if (!xfs_btree_sblock_verify_crc(bp
))
273 xfs_buf_ioerror(bp
, -EFSBADCRC
);
274 else if (!xfs_inobt_verify(bp
))
275 xfs_buf_ioerror(bp
, -EFSCORRUPTED
);
278 trace_xfs_btree_corrupt(bp
, _RET_IP_
);
279 xfs_verifier_error(bp
);
284 xfs_inobt_write_verify(
287 if (!xfs_inobt_verify(bp
)) {
288 trace_xfs_btree_corrupt(bp
, _RET_IP_
);
289 xfs_buf_ioerror(bp
, -EFSCORRUPTED
);
290 xfs_verifier_error(bp
);
293 xfs_btree_sblock_calc_crc(bp
);
297 const struct xfs_buf_ops xfs_inobt_buf_ops
= {
298 .verify_read
= xfs_inobt_read_verify
,
299 .verify_write
= xfs_inobt_write_verify
,
302 #if defined(DEBUG) || defined(XFS_WARN)
304 xfs_inobt_keys_inorder(
305 struct xfs_btree_cur
*cur
,
306 union xfs_btree_key
*k1
,
307 union xfs_btree_key
*k2
)
309 return be32_to_cpu(k1
->inobt
.ir_startino
) <
310 be32_to_cpu(k2
->inobt
.ir_startino
);
314 xfs_inobt_recs_inorder(
315 struct xfs_btree_cur
*cur
,
316 union xfs_btree_rec
*r1
,
317 union xfs_btree_rec
*r2
)
319 return be32_to_cpu(r1
->inobt
.ir_startino
) + XFS_INODES_PER_CHUNK
<=
320 be32_to_cpu(r2
->inobt
.ir_startino
);
324 static const struct xfs_btree_ops xfs_inobt_ops
= {
325 .rec_len
= sizeof(xfs_inobt_rec_t
),
326 .key_len
= sizeof(xfs_inobt_key_t
),
328 .dup_cursor
= xfs_inobt_dup_cursor
,
329 .set_root
= xfs_inobt_set_root
,
330 .alloc_block
= xfs_inobt_alloc_block
,
331 .free_block
= xfs_inobt_free_block
,
332 .get_minrecs
= xfs_inobt_get_minrecs
,
333 .get_maxrecs
= xfs_inobt_get_maxrecs
,
334 .init_key_from_rec
= xfs_inobt_init_key_from_rec
,
335 .init_rec_from_key
= xfs_inobt_init_rec_from_key
,
336 .init_rec_from_cur
= xfs_inobt_init_rec_from_cur
,
337 .init_ptr_from_cur
= xfs_inobt_init_ptr_from_cur
,
338 .key_diff
= xfs_inobt_key_diff
,
339 .buf_ops
= &xfs_inobt_buf_ops
,
340 #if defined(DEBUG) || defined(XFS_WARN)
341 .keys_inorder
= xfs_inobt_keys_inorder
,
342 .recs_inorder
= xfs_inobt_recs_inorder
,
346 static const struct xfs_btree_ops xfs_finobt_ops
= {
347 .rec_len
= sizeof(xfs_inobt_rec_t
),
348 .key_len
= sizeof(xfs_inobt_key_t
),
350 .dup_cursor
= xfs_inobt_dup_cursor
,
351 .set_root
= xfs_finobt_set_root
,
352 .alloc_block
= xfs_inobt_alloc_block
,
353 .free_block
= xfs_inobt_free_block
,
354 .get_minrecs
= xfs_inobt_get_minrecs
,
355 .get_maxrecs
= xfs_inobt_get_maxrecs
,
356 .init_key_from_rec
= xfs_inobt_init_key_from_rec
,
357 .init_rec_from_key
= xfs_inobt_init_rec_from_key
,
358 .init_rec_from_cur
= xfs_inobt_init_rec_from_cur
,
359 .init_ptr_from_cur
= xfs_finobt_init_ptr_from_cur
,
360 .key_diff
= xfs_inobt_key_diff
,
361 .buf_ops
= &xfs_inobt_buf_ops
,
362 #if defined(DEBUG) || defined(XFS_WARN)
363 .keys_inorder
= xfs_inobt_keys_inorder
,
364 .recs_inorder
= xfs_inobt_recs_inorder
,
369 * Allocate a new inode btree cursor.
371 struct xfs_btree_cur
* /* new inode btree cursor */
372 xfs_inobt_init_cursor(
373 struct xfs_mount
*mp
, /* file system mount point */
374 struct xfs_trans
*tp
, /* transaction pointer */
375 struct xfs_buf
*agbp
, /* buffer for agi structure */
376 xfs_agnumber_t agno
, /* allocation group number */
377 xfs_btnum_t btnum
) /* ialloc or free ino btree */
379 struct xfs_agi
*agi
= XFS_BUF_TO_AGI(agbp
);
380 struct xfs_btree_cur
*cur
;
382 cur
= kmem_zone_zalloc(xfs_btree_cur_zone
, KM_SLEEP
);
386 cur
->bc_btnum
= btnum
;
387 if (btnum
== XFS_BTNUM_INO
) {
388 cur
->bc_nlevels
= be32_to_cpu(agi
->agi_level
);
389 cur
->bc_ops
= &xfs_inobt_ops
;
391 cur
->bc_nlevels
= be32_to_cpu(agi
->agi_free_level
);
392 cur
->bc_ops
= &xfs_finobt_ops
;
395 cur
->bc_blocklog
= mp
->m_sb
.sb_blocklog
;
397 if (xfs_sb_version_hascrc(&mp
->m_sb
))
398 cur
->bc_flags
|= XFS_BTREE_CRC_BLOCKS
;
400 cur
->bc_private
.a
.agbp
= agbp
;
401 cur
->bc_private
.a
.agno
= agno
;
407 * Calculate number of records in an inobt btree block.
411 struct xfs_mount
*mp
,
415 blocklen
-= XFS_INOBT_BLOCK_LEN(mp
);
418 return blocklen
/ sizeof(xfs_inobt_rec_t
);
419 return blocklen
/ (sizeof(xfs_inobt_key_t
) + sizeof(xfs_inobt_ptr_t
));