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_types.h"
23 #include "xfs_trans.h"
26 #include "xfs_mount.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_alloc_btree.h"
29 #include "xfs_ialloc_btree.h"
30 #include "xfs_dinode.h"
31 #include "xfs_inode.h"
32 #include "xfs_btree.h"
33 #include "xfs_alloc.h"
34 #include "xfs_extent_busy.h"
35 #include "xfs_error.h"
36 #include "xfs_trace.h"
39 STATIC
struct xfs_btree_cur
*
40 xfs_allocbt_dup_cursor(
41 struct xfs_btree_cur
*cur
)
43 return xfs_allocbt_init_cursor(cur
->bc_mp
, cur
->bc_tp
,
44 cur
->bc_private
.a
.agbp
, cur
->bc_private
.a
.agno
,
50 struct xfs_btree_cur
*cur
,
51 union xfs_btree_ptr
*ptr
,
54 struct xfs_buf
*agbp
= cur
->bc_private
.a
.agbp
;
55 struct xfs_agf
*agf
= XFS_BUF_TO_AGF(agbp
);
56 xfs_agnumber_t seqno
= be32_to_cpu(agf
->agf_seqno
);
57 int btnum
= cur
->bc_btnum
;
58 struct xfs_perag
*pag
= xfs_perag_get(cur
->bc_mp
, seqno
);
62 agf
->agf_roots
[btnum
] = ptr
->s
;
63 be32_add_cpu(&agf
->agf_levels
[btnum
], inc
);
64 pag
->pagf_levels
[btnum
] += inc
;
67 xfs_alloc_log_agf(cur
->bc_tp
, agbp
, XFS_AGF_ROOTS
| XFS_AGF_LEVELS
);
71 xfs_allocbt_alloc_block(
72 struct xfs_btree_cur
*cur
,
73 union xfs_btree_ptr
*start
,
74 union xfs_btree_ptr
*new,
81 XFS_BTREE_TRACE_CURSOR(cur
, XBT_ENTRY
);
83 /* Allocate the new block from the freelist. If we can't, give up. */
84 error
= xfs_alloc_get_freelist(cur
->bc_tp
, cur
->bc_private
.a
.agbp
,
87 XFS_BTREE_TRACE_CURSOR(cur
, XBT_ERROR
);
91 if (bno
== NULLAGBLOCK
) {
92 XFS_BTREE_TRACE_CURSOR(cur
, XBT_EXIT
);
97 xfs_alloc_busy_reuse(cur
->bc_mp
, cur
->bc_private
.a
.agno
, bno
, 1, false);
99 xfs_trans_agbtree_delta(cur
->bc_tp
, 1);
100 new->s
= cpu_to_be32(bno
);
102 XFS_BTREE_TRACE_CURSOR(cur
, XBT_EXIT
);
108 xfs_allocbt_free_block(
109 struct xfs_btree_cur
*cur
,
112 struct xfs_buf
*agbp
= cur
->bc_private
.a
.agbp
;
113 struct xfs_agf
*agf
= XFS_BUF_TO_AGF(agbp
);
117 bno
= xfs_daddr_to_agbno(cur
->bc_mp
, XFS_BUF_ADDR(bp
));
118 error
= xfs_alloc_put_freelist(cur
->bc_tp
, agbp
, NULL
, bno
, 1);
122 xfs_alloc_busy_insert(cur
->bc_tp
, be32_to_cpu(agf
->agf_seqno
), bno
, 1,
123 XFS_ALLOC_BUSY_SKIP_DISCARD
);
124 xfs_trans_agbtree_delta(cur
->bc_tp
, -1);
129 * Update the longest extent in the AGF
132 xfs_allocbt_update_lastrec(
133 struct xfs_btree_cur
*cur
,
134 struct xfs_btree_block
*block
,
135 union xfs_btree_rec
*rec
,
139 struct xfs_agf
*agf
= XFS_BUF_TO_AGF(cur
->bc_private
.a
.agbp
);
140 xfs_agnumber_t seqno
= be32_to_cpu(agf
->agf_seqno
);
141 struct xfs_perag
*pag
;
145 ASSERT(cur
->bc_btnum
== XFS_BTNUM_CNT
);
150 * If this is the last leaf block and it's the last record,
151 * then update the size of the longest extent in the AG.
153 if (ptr
!= xfs_btree_get_numrecs(block
))
155 len
= rec
->alloc
.ar_blockcount
;
158 if (be32_to_cpu(rec
->alloc
.ar_blockcount
) <=
159 be32_to_cpu(agf
->agf_longest
))
161 len
= rec
->alloc
.ar_blockcount
;
164 numrecs
= xfs_btree_get_numrecs(block
);
167 ASSERT(ptr
== numrecs
+ 1);
170 xfs_alloc_rec_t
*rrp
;
172 rrp
= XFS_ALLOC_REC_ADDR(cur
->bc_mp
, block
, numrecs
);
173 len
= rrp
->ar_blockcount
;
184 agf
->agf_longest
= len
;
185 pag
= xfs_perag_get(cur
->bc_mp
, seqno
);
186 pag
->pagf_longest
= be32_to_cpu(len
);
188 xfs_alloc_log_agf(cur
->bc_tp
, cur
->bc_private
.a
.agbp
, XFS_AGF_LONGEST
);
192 xfs_allocbt_get_minrecs(
193 struct xfs_btree_cur
*cur
,
196 return cur
->bc_mp
->m_alloc_mnr
[level
!= 0];
200 xfs_allocbt_get_maxrecs(
201 struct xfs_btree_cur
*cur
,
204 return cur
->bc_mp
->m_alloc_mxr
[level
!= 0];
208 xfs_allocbt_init_key_from_rec(
209 union xfs_btree_key
*key
,
210 union xfs_btree_rec
*rec
)
212 ASSERT(rec
->alloc
.ar_startblock
!= 0);
214 key
->alloc
.ar_startblock
= rec
->alloc
.ar_startblock
;
215 key
->alloc
.ar_blockcount
= rec
->alloc
.ar_blockcount
;
219 xfs_allocbt_init_rec_from_key(
220 union xfs_btree_key
*key
,
221 union xfs_btree_rec
*rec
)
223 ASSERT(key
->alloc
.ar_startblock
!= 0);
225 rec
->alloc
.ar_startblock
= key
->alloc
.ar_startblock
;
226 rec
->alloc
.ar_blockcount
= key
->alloc
.ar_blockcount
;
230 xfs_allocbt_init_rec_from_cur(
231 struct xfs_btree_cur
*cur
,
232 union xfs_btree_rec
*rec
)
234 ASSERT(cur
->bc_rec
.a
.ar_startblock
!= 0);
236 rec
->alloc
.ar_startblock
= cpu_to_be32(cur
->bc_rec
.a
.ar_startblock
);
237 rec
->alloc
.ar_blockcount
= cpu_to_be32(cur
->bc_rec
.a
.ar_blockcount
);
241 xfs_allocbt_init_ptr_from_cur(
242 struct xfs_btree_cur
*cur
,
243 union xfs_btree_ptr
*ptr
)
245 struct xfs_agf
*agf
= XFS_BUF_TO_AGF(cur
->bc_private
.a
.agbp
);
247 ASSERT(cur
->bc_private
.a
.agno
== be32_to_cpu(agf
->agf_seqno
));
248 ASSERT(agf
->agf_roots
[cur
->bc_btnum
] != 0);
250 ptr
->s
= agf
->agf_roots
[cur
->bc_btnum
];
254 xfs_allocbt_key_diff(
255 struct xfs_btree_cur
*cur
,
256 union xfs_btree_key
*key
)
258 xfs_alloc_rec_incore_t
*rec
= &cur
->bc_rec
.a
;
259 xfs_alloc_key_t
*kp
= &key
->alloc
;
262 if (cur
->bc_btnum
== XFS_BTNUM_BNO
) {
263 return (__int64_t
)be32_to_cpu(kp
->ar_startblock
) -
267 diff
= (__int64_t
)be32_to_cpu(kp
->ar_blockcount
) - rec
->ar_blockcount
;
271 return (__int64_t
)be32_to_cpu(kp
->ar_startblock
) - rec
->ar_startblock
;
276 xfs_allocbt_keys_inorder(
277 struct xfs_btree_cur
*cur
,
278 union xfs_btree_key
*k1
,
279 union xfs_btree_key
*k2
)
281 if (cur
->bc_btnum
== XFS_BTNUM_BNO
) {
282 return be32_to_cpu(k1
->alloc
.ar_startblock
) <
283 be32_to_cpu(k2
->alloc
.ar_startblock
);
285 return be32_to_cpu(k1
->alloc
.ar_blockcount
) <
286 be32_to_cpu(k2
->alloc
.ar_blockcount
) ||
287 (k1
->alloc
.ar_blockcount
== k2
->alloc
.ar_blockcount
&&
288 be32_to_cpu(k1
->alloc
.ar_startblock
) <
289 be32_to_cpu(k2
->alloc
.ar_startblock
));
294 xfs_allocbt_recs_inorder(
295 struct xfs_btree_cur
*cur
,
296 union xfs_btree_rec
*r1
,
297 union xfs_btree_rec
*r2
)
299 if (cur
->bc_btnum
== XFS_BTNUM_BNO
) {
300 return be32_to_cpu(r1
->alloc
.ar_startblock
) +
301 be32_to_cpu(r1
->alloc
.ar_blockcount
) <=
302 be32_to_cpu(r2
->alloc
.ar_startblock
);
304 return be32_to_cpu(r1
->alloc
.ar_blockcount
) <
305 be32_to_cpu(r2
->alloc
.ar_blockcount
) ||
306 (r1
->alloc
.ar_blockcount
== r2
->alloc
.ar_blockcount
&&
307 be32_to_cpu(r1
->alloc
.ar_startblock
) <
308 be32_to_cpu(r2
->alloc
.ar_startblock
));
313 static const struct xfs_btree_ops xfs_allocbt_ops
= {
314 .rec_len
= sizeof(xfs_alloc_rec_t
),
315 .key_len
= sizeof(xfs_alloc_key_t
),
317 .dup_cursor
= xfs_allocbt_dup_cursor
,
318 .set_root
= xfs_allocbt_set_root
,
319 .alloc_block
= xfs_allocbt_alloc_block
,
320 .free_block
= xfs_allocbt_free_block
,
321 .update_lastrec
= xfs_allocbt_update_lastrec
,
322 .get_minrecs
= xfs_allocbt_get_minrecs
,
323 .get_maxrecs
= xfs_allocbt_get_maxrecs
,
324 .init_key_from_rec
= xfs_allocbt_init_key_from_rec
,
325 .init_rec_from_key
= xfs_allocbt_init_rec_from_key
,
326 .init_rec_from_cur
= xfs_allocbt_init_rec_from_cur
,
327 .init_ptr_from_cur
= xfs_allocbt_init_ptr_from_cur
,
328 .key_diff
= xfs_allocbt_key_diff
,
330 .keys_inorder
= xfs_allocbt_keys_inorder
,
331 .recs_inorder
= xfs_allocbt_recs_inorder
,
336 * Allocate a new allocation btree cursor.
338 struct xfs_btree_cur
* /* new alloc btree cursor */
339 xfs_allocbt_init_cursor(
340 struct xfs_mount
*mp
, /* file system mount point */
341 struct xfs_trans
*tp
, /* transaction pointer */
342 struct xfs_buf
*agbp
, /* buffer for agf structure */
343 xfs_agnumber_t agno
, /* allocation group number */
344 xfs_btnum_t btnum
) /* btree identifier */
346 struct xfs_agf
*agf
= XFS_BUF_TO_AGF(agbp
);
347 struct xfs_btree_cur
*cur
;
349 ASSERT(btnum
== XFS_BTNUM_BNO
|| btnum
== XFS_BTNUM_CNT
);
351 cur
= kmem_zone_zalloc(xfs_btree_cur_zone
, KM_SLEEP
);
355 cur
->bc_btnum
= btnum
;
356 cur
->bc_blocklog
= mp
->m_sb
.sb_blocklog
;
357 cur
->bc_ops
= &xfs_allocbt_ops
;
359 if (btnum
== XFS_BTNUM_CNT
) {
360 cur
->bc_nlevels
= be32_to_cpu(agf
->agf_levels
[XFS_BTNUM_CNT
]);
361 cur
->bc_flags
= XFS_BTREE_LASTREC_UPDATE
;
363 cur
->bc_nlevels
= be32_to_cpu(agf
->agf_levels
[XFS_BTNUM_BNO
]);
366 cur
->bc_private
.a
.agbp
= agbp
;
367 cur
->bc_private
.a
.agno
= agno
;
373 * Calculate number of records in an alloc btree block.
377 struct xfs_mount
*mp
,
381 blocklen
-= XFS_ALLOC_BLOCK_LEN(mp
);
384 return blocklen
/ sizeof(xfs_alloc_rec_t
);
385 return blocklen
/ (sizeof(xfs_alloc_key_t
) + sizeof(xfs_alloc_ptr_t
));