2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
5 * Zoltan Sogor <weth@inf.u-szeged.hu>,
6 * Patrik Kluba <pajko@halom.u-szeged.hu>,
7 * University of Szeged, Hungary
8 * 2005 KaiGai Kohei <kaigai@ak.jp.nec.com>
10 * For licensing information, see the file 'LICENCE' in this directory.
12 * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $
16 #include <linux/kernel.h>
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/mtd/mtd.h>
20 #include <linux/pagemap.h>
21 #include <linux/crc32.h>
22 #include <linux/compiler.h>
23 #include <linux/vmalloc.h>
27 int jffs2_sum_init(struct jffs2_sb_info
*c
)
29 c
->summary
= kmalloc(sizeof(struct jffs2_summary
), GFP_KERNEL
);
32 JFFS2_WARNING("Can't allocate memory for summary information!\n");
36 memset(c
->summary
, 0, sizeof(struct jffs2_summary
));
38 c
->summary
->sum_buf
= vmalloc(c
->sector_size
);
40 if (!c
->summary
->sum_buf
) {
41 JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
46 dbg_summary("returned succesfully\n");
51 void jffs2_sum_exit(struct jffs2_sb_info
*c
)
53 dbg_summary("called\n");
55 jffs2_sum_disable_collecting(c
->summary
);
57 vfree(c
->summary
->sum_buf
);
58 c
->summary
->sum_buf
= NULL
;
64 static int jffs2_sum_add_mem(struct jffs2_summary
*s
, union jffs2_sum_mem
*item
)
66 if (!s
->sum_list_head
)
67 s
->sum_list_head
= (union jffs2_sum_mem
*) item
;
69 s
->sum_list_tail
->u
.next
= (union jffs2_sum_mem
*) item
;
70 s
->sum_list_tail
= (union jffs2_sum_mem
*) item
;
72 switch (je16_to_cpu(item
->u
.nodetype
)) {
73 case JFFS2_NODETYPE_INODE
:
74 s
->sum_size
+= JFFS2_SUMMARY_INODE_SIZE
;
76 dbg_summary("inode (%u) added to summary\n",
77 je32_to_cpu(item
->i
.inode
));
79 case JFFS2_NODETYPE_DIRENT
:
80 s
->sum_size
+= JFFS2_SUMMARY_DIRENT_SIZE(item
->d
.nsize
);
82 dbg_summary("dirent (%u) added to summary\n",
83 je32_to_cpu(item
->d
.ino
));
85 #ifdef CONFIG_JFFS2_FS_XATTR
86 case JFFS2_NODETYPE_XATTR
:
87 s
->sum_size
+= JFFS2_SUMMARY_XATTR_SIZE
;
89 dbg_summary("xattr (xid=%u, version=%u) added to summary\n",
90 je32_to_cpu(item
->x
.xid
), je32_to_cpu(item
->x
.version
));
92 case JFFS2_NODETYPE_XREF
:
93 s
->sum_size
+= JFFS2_SUMMARY_XREF_SIZE
;
95 dbg_summary("xref added to summary\n");
99 JFFS2_WARNING("UNKNOWN node type %u\n",
100 je16_to_cpu(item
->u
.nodetype
));
107 /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */
109 int jffs2_sum_add_padding_mem(struct jffs2_summary
*s
, uint32_t size
)
111 dbg_summary("called with %u\n", size
);
112 s
->sum_padded
+= size
;
116 int jffs2_sum_add_inode_mem(struct jffs2_summary
*s
, struct jffs2_raw_inode
*ri
,
119 struct jffs2_sum_inode_mem
*temp
= kmalloc(sizeof(struct jffs2_sum_inode_mem
), GFP_KERNEL
);
124 temp
->nodetype
= ri
->nodetype
;
125 temp
->inode
= ri
->ino
;
126 temp
->version
= ri
->version
;
127 temp
->offset
= cpu_to_je32(ofs
); /* relative offset from the begining of the jeb */
128 temp
->totlen
= ri
->totlen
;
131 return jffs2_sum_add_mem(s
, (union jffs2_sum_mem
*)temp
);
134 int jffs2_sum_add_dirent_mem(struct jffs2_summary
*s
, struct jffs2_raw_dirent
*rd
,
137 struct jffs2_sum_dirent_mem
*temp
=
138 kmalloc(sizeof(struct jffs2_sum_dirent_mem
) + rd
->nsize
, GFP_KERNEL
);
143 temp
->nodetype
= rd
->nodetype
;
144 temp
->totlen
= rd
->totlen
;
145 temp
->offset
= cpu_to_je32(ofs
); /* relative from the begining of the jeb */
146 temp
->pino
= rd
->pino
;
147 temp
->version
= rd
->version
;
149 temp
->nsize
= rd
->nsize
;
150 temp
->type
= rd
->type
;
153 memcpy(temp
->name
, rd
->name
, rd
->nsize
);
155 return jffs2_sum_add_mem(s
, (union jffs2_sum_mem
*)temp
);
158 #ifdef CONFIG_JFFS2_FS_XATTR
159 int jffs2_sum_add_xattr_mem(struct jffs2_summary
*s
, struct jffs2_raw_xattr
*rx
, uint32_t ofs
)
161 struct jffs2_sum_xattr_mem
*temp
;
163 temp
= kmalloc(sizeof(struct jffs2_sum_xattr_mem
), GFP_KERNEL
);
167 temp
->nodetype
= rx
->nodetype
;
169 temp
->version
= rx
->version
;
170 temp
->offset
= cpu_to_je32(ofs
);
171 temp
->totlen
= rx
->totlen
;
174 return jffs2_sum_add_mem(s
, (union jffs2_sum_mem
*)temp
);
177 int jffs2_sum_add_xref_mem(struct jffs2_summary
*s
, struct jffs2_raw_xref
*rr
, uint32_t ofs
)
179 struct jffs2_sum_xref_mem
*temp
;
181 temp
= kmalloc(sizeof(struct jffs2_sum_xref_mem
), GFP_KERNEL
);
185 temp
->nodetype
= rr
->nodetype
;
186 temp
->offset
= cpu_to_je32(ofs
);
189 return jffs2_sum_add_mem(s
, (union jffs2_sum_mem
*)temp
);
192 /* Cleanup every collected summary information */
194 static void jffs2_sum_clean_collected(struct jffs2_summary
*s
)
196 union jffs2_sum_mem
*temp
;
198 if (!s
->sum_list_head
) {
199 dbg_summary("already empty\n");
201 while (s
->sum_list_head
) {
202 temp
= s
->sum_list_head
;
203 s
->sum_list_head
= s
->sum_list_head
->u
.next
;
206 s
->sum_list_tail
= NULL
;
211 void jffs2_sum_reset_collected(struct jffs2_summary
*s
)
213 dbg_summary("called\n");
214 jffs2_sum_clean_collected(s
);
218 void jffs2_sum_disable_collecting(struct jffs2_summary
*s
)
220 dbg_summary("called\n");
221 jffs2_sum_clean_collected(s
);
222 s
->sum_size
= JFFS2_SUMMARY_NOSUM_SIZE
;
225 int jffs2_sum_is_disabled(struct jffs2_summary
*s
)
227 return (s
->sum_size
== JFFS2_SUMMARY_NOSUM_SIZE
);
230 /* Move the collected summary information into sb (called from scan.c) */
232 void jffs2_sum_move_collected(struct jffs2_sb_info
*c
, struct jffs2_summary
*s
)
234 dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
235 c
->summary
->sum_size
, c
->summary
->sum_num
,
236 s
->sum_size
, s
->sum_num
);
238 c
->summary
->sum_size
= s
->sum_size
;
239 c
->summary
->sum_num
= s
->sum_num
;
240 c
->summary
->sum_padded
= s
->sum_padded
;
241 c
->summary
->sum_list_head
= s
->sum_list_head
;
242 c
->summary
->sum_list_tail
= s
->sum_list_tail
;
244 s
->sum_list_head
= s
->sum_list_tail
= NULL
;
247 /* Called from wbuf.c to collect writed node info */
249 int jffs2_sum_add_kvec(struct jffs2_sb_info
*c
, const struct kvec
*invecs
,
250 unsigned long count
, uint32_t ofs
)
252 union jffs2_node_union
*node
;
253 struct jffs2_eraseblock
*jeb
;
255 node
= invecs
[0].iov_base
;
256 jeb
= &c
->blocks
[ofs
/ c
->sector_size
];
259 switch (je16_to_cpu(node
->u
.nodetype
)) {
260 case JFFS2_NODETYPE_INODE
: {
261 struct jffs2_sum_inode_mem
*temp
=
262 kmalloc(sizeof(struct jffs2_sum_inode_mem
), GFP_KERNEL
);
267 temp
->nodetype
= node
->i
.nodetype
;
268 temp
->inode
= node
->i
.ino
;
269 temp
->version
= node
->i
.version
;
270 temp
->offset
= cpu_to_je32(ofs
);
271 temp
->totlen
= node
->i
.totlen
;
274 return jffs2_sum_add_mem(c
->summary
, (union jffs2_sum_mem
*)temp
);
277 case JFFS2_NODETYPE_DIRENT
: {
278 struct jffs2_sum_dirent_mem
*temp
=
279 kmalloc(sizeof(struct jffs2_sum_dirent_mem
) + node
->d
.nsize
, GFP_KERNEL
);
284 temp
->nodetype
= node
->d
.nodetype
;
285 temp
->totlen
= node
->d
.totlen
;
286 temp
->offset
= cpu_to_je32(ofs
);
287 temp
->pino
= node
->d
.pino
;
288 temp
->version
= node
->d
.version
;
289 temp
->ino
= node
->d
.ino
;
290 temp
->nsize
= node
->d
.nsize
;
291 temp
->type
= node
->d
.type
;
296 memcpy(temp
->name
,node
->d
.name
,node
->d
.nsize
);
300 memcpy(temp
->name
,invecs
[1].iov_base
,node
->d
.nsize
);
304 BUG(); /* impossible count value */
308 return jffs2_sum_add_mem(c
->summary
, (union jffs2_sum_mem
*)temp
);
310 #ifdef CONFIG_JFFS2_FS_XATTR
311 case JFFS2_NODETYPE_XATTR
: {
312 struct jffs2_sum_xattr_mem
*temp
;
313 if (je32_to_cpu(node
->x
.version
) == 0xffffffff)
315 temp
= kmalloc(sizeof(struct jffs2_sum_xattr_mem
), GFP_KERNEL
);
319 temp
->nodetype
= node
->x
.nodetype
;
320 temp
->xid
= node
->x
.xid
;
321 temp
->version
= node
->x
.version
;
322 temp
->totlen
= node
->x
.totlen
;
323 temp
->offset
= cpu_to_je32(ofs
);
326 return jffs2_sum_add_mem(c
->summary
, (union jffs2_sum_mem
*)temp
);
328 case JFFS2_NODETYPE_XREF
: {
329 struct jffs2_sum_xref_mem
*temp
;
331 if (je32_to_cpu(node
->r
.ino
) == 0xffffffff
332 && je32_to_cpu(node
->r
.xid
) == 0xffffffff)
334 temp
= kmalloc(sizeof(struct jffs2_sum_xref_mem
), GFP_KERNEL
);
337 temp
->nodetype
= node
->r
.nodetype
;
338 temp
->offset
= cpu_to_je32(ofs
);
341 return jffs2_sum_add_mem(c
->summary
, (union jffs2_sum_mem
*)temp
);
344 case JFFS2_NODETYPE_PADDING
:
345 dbg_summary("node PADDING\n");
346 c
->summary
->sum_padded
+= je32_to_cpu(node
->u
.totlen
);
349 case JFFS2_NODETYPE_CLEANMARKER
:
350 dbg_summary("node CLEANMARKER\n");
353 case JFFS2_NODETYPE_SUMMARY
:
354 dbg_summary("node SUMMARY\n");
358 /* If you implement a new node type you should also implement
359 summary support for it or disable summary.
368 JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
372 static struct jffs2_raw_node_ref
*alloc_ref_at(struct jffs2_sb_info
*c
, struct jffs2_eraseblock
*jeb
,
375 struct jffs2_raw_node_ref
*ref
;
376 /* If there was a gap, mark it dirty */
377 if (offset
> c
->sector_size
- jeb
->free_size
) {
378 int ret
= jffs2_scan_dirty_space(c
, jeb
, offset
- (c
->sector_size
- jeb
->free_size
));
382 ref
= jffs2_alloc_raw_node_ref();
386 ref
->flash_offset
= jeb
->offset
+ offset
;
390 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
392 static int jffs2_sum_process_sum_data(struct jffs2_sb_info
*c
, struct jffs2_eraseblock
*jeb
,
393 struct jffs2_raw_summary
*summary
, uint32_t *pseudo_random
)
395 struct jffs2_raw_node_ref
*raw
;
396 struct jffs2_inode_cache
*ic
;
397 struct jffs2_full_dirent
*fd
;
404 for (i
=0; i
<je32_to_cpu(summary
->sum_num
); i
++) {
405 dbg_summary("processing summary index %d\n", i
);
407 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash
*)sp
)->nodetype
)) {
408 case JFFS2_NODETYPE_INODE
: {
409 struct jffs2_sum_inode_flash
*spi
;
412 ino
= je32_to_cpu(spi
->inode
);
414 dbg_summary("Inode at 0x%08x\n",
415 jeb
->offset
+ je32_to_cpu(spi
->offset
));
417 raw
= alloc_ref_at(c
, jeb
, je32_to_cpu(spi
->offset
));
419 JFFS2_NOTICE("allocation of node reference failed\n");
423 ic
= jffs2_scan_make_ino_cache(c
, ino
);
425 JFFS2_NOTICE("scan_make_ino_cache failed\n");
426 jffs2_free_raw_node_ref(raw
);
430 raw
->flash_offset
|= REF_UNCHECKED
;
432 raw
->next_in_ino
= ic
->nodes
;
435 jffs2_link_node_ref(c
, jeb
, raw
, PAD(je32_to_cpu(spi
->totlen
)));
437 *pseudo_random
+= je32_to_cpu(spi
->version
);
439 sp
+= JFFS2_SUMMARY_INODE_SIZE
;
444 case JFFS2_NODETYPE_DIRENT
: {
445 struct jffs2_sum_dirent_flash
*spd
;
448 dbg_summary("Dirent at 0x%08x\n",
449 jeb
->offset
+ je32_to_cpu(spd
->offset
));
451 fd
= jffs2_alloc_full_dirent(spd
->nsize
+1);
455 memcpy(&fd
->name
, spd
->name
, spd
->nsize
);
456 fd
->name
[spd
->nsize
] = 0;
458 raw
= alloc_ref_at(c
, jeb
, je32_to_cpu(spd
->offset
));
460 jffs2_free_full_dirent(fd
);
461 JFFS2_NOTICE("allocation of node reference failed\n");
465 ic
= jffs2_scan_make_ino_cache(c
, je32_to_cpu(spd
->pino
));
467 jffs2_free_full_dirent(fd
);
468 jffs2_free_raw_node_ref(raw
);
472 raw
->flash_offset
|= REF_PRISTINE
;
473 raw
->next_in_ino
= ic
->nodes
;
476 jffs2_link_node_ref(c
, jeb
, raw
, PAD(je32_to_cpu(spd
->totlen
)));
480 fd
->version
= je32_to_cpu(spd
->version
);
481 fd
->ino
= je32_to_cpu(spd
->ino
);
482 fd
->nhash
= full_name_hash(fd
->name
, spd
->nsize
);
483 fd
->type
= spd
->type
;
485 jffs2_add_fd_to_list(c
, fd
, &ic
->scan_dents
);
487 *pseudo_random
+= je32_to_cpu(spd
->version
);
489 sp
+= JFFS2_SUMMARY_DIRENT_SIZE(spd
->nsize
);
493 #ifdef CONFIG_JFFS2_FS_XATTR
494 case JFFS2_NODETYPE_XATTR
: {
495 struct jffs2_xattr_datum
*xd
;
496 struct jffs2_sum_xattr_flash
*spx
;
498 spx
= (struct jffs2_sum_xattr_flash
*)sp
;
499 dbg_summary("xattr at %#08x (xid=%u, version=%u)\n",
500 jeb
->offset
+ je32_to_cpu(spx
->offset
),
501 je32_to_cpu(spx
->xid
), je32_to_cpu(spx
->version
));
502 raw
= alloc_ref_at(c
, jeb
, je32_to_cpu(spx
->offset
));
504 JFFS2_NOTICE("allocation of node reference failed\n");
508 xd
= jffs2_setup_xattr_datum(c
, je32_to_cpu(spx
->xid
),
509 je32_to_cpu(spx
->version
));
511 jffs2_free_raw_node_ref(raw
);
512 if (PTR_ERR(xd
) == -EEXIST
) {
513 /* a newer version of xd exists */
514 if ((err
= jffs2_scan_dirty_space(c
, jeb
, je32_to_cpu(spx
->totlen
))))
516 sp
+= JFFS2_SUMMARY_XATTR_SIZE
;
519 JFFS2_NOTICE("allocation of xattr_datum failed\n");
525 raw
->flash_offset
|= REF_UNCHECKED
;
526 raw
->next_in_ino
= (void *)xd
;
528 jffs2_link_node_ref(c
, jeb
, raw
, PAD(je32_to_cpu(spx
->totlen
)));
530 *pseudo_random
+= je32_to_cpu(spx
->xid
);
531 sp
+= JFFS2_SUMMARY_XATTR_SIZE
;
535 case JFFS2_NODETYPE_XREF
: {
536 struct jffs2_xattr_ref
*ref
;
537 struct jffs2_sum_xref_flash
*spr
;
539 spr
= (struct jffs2_sum_xref_flash
*)sp
;
540 dbg_summary("xref at %#08x (xid=%u, ino=%u)\n",
541 jeb
->offset
+ je32_to_cpu(spr
->offset
),
542 je32_to_cpu(spr
->xid
), je32_to_cpu(spr
->ino
));
543 raw
= alloc_ref_at(c
, jeb
, je32_to_cpu(spr
->offset
));
545 JFFS2_NOTICE("allocation of node reference failed\n");
549 ref
= jffs2_alloc_xattr_ref();
551 JFFS2_NOTICE("allocation of xattr_datum failed\n");
552 jffs2_free_raw_node_ref(raw
);
556 ref
->ino
= 0xfffffffe;
557 ref
->xid
= 0xfffffffd;
559 ref
->next
= c
->xref_temp
;
562 raw
->flash_offset
|= REF_UNCHECKED
;
563 raw
->next_in_ino
= (void *)ref
;
565 jffs2_link_node_ref(c
, jeb
, raw
, PAD(sizeof(struct jffs2_raw_xref
)));
567 *pseudo_random
+= raw
->flash_offset
;
568 sp
+= JFFS2_SUMMARY_XREF_SIZE
;
574 uint16_t nodetype
= je16_to_cpu(((struct jffs2_sum_unknown_flash
*)sp
)->nodetype
);
575 JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype
);
576 if ((nodetype
& JFFS2_COMPAT_MASK
) == JFFS2_FEATURE_INCOMPAT
)
579 /* For compatible node types, just fall back to the full scan */
580 c
->wasted_size
-= jeb
->wasted_size
;
581 c
->free_size
+= c
->sector_size
- jeb
->free_size
;
582 c
->used_size
-= jeb
->used_size
;
583 c
->dirty_size
-= jeb
->dirty_size
;
584 jeb
->wasted_size
= jeb
->used_size
= jeb
->dirty_size
= 0;
585 jeb
->free_size
= c
->sector_size
;
587 jffs2_free_all_node_refs(c
, jeb
);
588 return -ENOTRECOVERABLE
;
596 /* Process the summary node - called from jffs2_scan_eraseblock() */
597 int jffs2_sum_scan_sumnode(struct jffs2_sb_info
*c
, struct jffs2_eraseblock
*jeb
,
598 struct jffs2_raw_summary
*summary
, uint32_t sumsize
,
599 uint32_t *pseudo_random
)
601 struct jffs2_unknown_node crcnode
;
602 struct jffs2_raw_node_ref
*cache_ref
;
607 ofs
= c
->sector_size
- sumsize
;
609 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
610 jeb
->offset
, jeb
->offset
+ ofs
, sumsize
);
612 /* OK, now check for node validity and CRC */
613 crcnode
.magic
= cpu_to_je16(JFFS2_MAGIC_BITMASK
);
614 crcnode
.nodetype
= cpu_to_je16(JFFS2_NODETYPE_SUMMARY
);
615 crcnode
.totlen
= summary
->totlen
;
616 crc
= crc32(0, &crcnode
, sizeof(crcnode
)-4);
618 if (je32_to_cpu(summary
->hdr_crc
) != crc
) {
619 dbg_summary("Summary node header is corrupt (bad CRC or "
620 "no summary at all)\n");
624 if (je32_to_cpu(summary
->totlen
) != sumsize
) {
625 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
629 crc
= crc32(0, summary
, sizeof(struct jffs2_raw_summary
)-8);
631 if (je32_to_cpu(summary
->node_crc
) != crc
) {
632 dbg_summary("Summary node is corrupt (bad CRC)\n");
636 crc
= crc32(0, summary
->sum
, sumsize
- sizeof(struct jffs2_raw_summary
));
638 if (je32_to_cpu(summary
->sum_crc
) != crc
) {
639 dbg_summary("Summary node data is corrupt (bad CRC)\n");
643 if ( je32_to_cpu(summary
->cln_mkr
) ) {
645 dbg_summary("Summary : CLEANMARKER node \n");
647 if (je32_to_cpu(summary
->cln_mkr
) != c
->cleanmarker_size
) {
648 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
649 je32_to_cpu(summary
->cln_mkr
), c
->cleanmarker_size
);
650 if ((err
= jffs2_scan_dirty_space(c
, jeb
, PAD(je32_to_cpu(summary
->cln_mkr
)))))
652 } else if (jeb
->first_node
) {
653 dbg_summary("CLEANMARKER node not first node in block "
654 "(0x%08x)\n", jeb
->offset
);
655 if ((err
= jffs2_scan_dirty_space(c
, jeb
, PAD(je32_to_cpu(summary
->cln_mkr
)))))
658 struct jffs2_raw_node_ref
*marker_ref
= jffs2_alloc_raw_node_ref();
661 JFFS2_NOTICE("Failed to allocate node ref for clean marker\n");
665 marker_ref
->flash_offset
= jeb
->offset
| REF_NORMAL
;
666 marker_ref
->next_in_ino
= NULL
;
668 jffs2_link_node_ref(c
, jeb
, marker_ref
, je32_to_cpu(summary
->cln_mkr
));
672 ret
= jffs2_sum_process_sum_data(c
, jeb
, summary
, pseudo_random
);
673 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
674 scan of this eraseblock. So return zero */
675 if (ret
== -ENOTRECOVERABLE
)
678 return ret
; /* real error */
680 /* for PARANOIA_CHECK */
681 cache_ref
= alloc_ref_at(c
, jeb
, ofs
);
684 JFFS2_NOTICE("Failed to allocate node ref for cache\n");
688 cache_ref
->next_in_ino
= NULL
;
689 cache_ref
->flash_offset
|= REF_NORMAL
;
691 jffs2_link_node_ref(c
, jeb
, cache_ref
, sumsize
);
693 if (unlikely(jeb
->free_size
)) {
694 JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
695 jeb
->free_size
, jeb
->offset
);
696 jeb
->wasted_size
+= jeb
->free_size
;
697 c
->wasted_size
+= jeb
->free_size
;
698 c
->free_size
-= jeb
->free_size
;
702 return jffs2_scan_classify_jeb(c
, jeb
);
705 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
710 /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
712 static int jffs2_sum_write_data(struct jffs2_sb_info
*c
, struct jffs2_eraseblock
*jeb
,
713 uint32_t infosize
, uint32_t datasize
, int padsize
)
715 struct jffs2_raw_summary isum
;
716 union jffs2_sum_mem
*temp
;
717 struct jffs2_sum_marker
*sm
;
723 memset(c
->summary
->sum_buf
, 0xff, datasize
);
724 memset(&isum
, 0, sizeof(isum
));
726 isum
.magic
= cpu_to_je16(JFFS2_MAGIC_BITMASK
);
727 isum
.nodetype
= cpu_to_je16(JFFS2_NODETYPE_SUMMARY
);
728 isum
.totlen
= cpu_to_je32(infosize
);
729 isum
.hdr_crc
= cpu_to_je32(crc32(0, &isum
, sizeof(struct jffs2_unknown_node
) - 4));
730 isum
.padded
= cpu_to_je32(c
->summary
->sum_padded
);
731 isum
.cln_mkr
= cpu_to_je32(c
->cleanmarker_size
);
732 isum
.sum_num
= cpu_to_je32(c
->summary
->sum_num
);
733 wpage
= c
->summary
->sum_buf
;
735 while (c
->summary
->sum_num
) {
736 temp
= c
->summary
->sum_list_head
;
738 switch (je16_to_cpu(temp
->u
.nodetype
)) {
739 case JFFS2_NODETYPE_INODE
: {
740 struct jffs2_sum_inode_flash
*sino_ptr
= wpage
;
742 sino_ptr
->nodetype
= temp
->i
.nodetype
;
743 sino_ptr
->inode
= temp
->i
.inode
;
744 sino_ptr
->version
= temp
->i
.version
;
745 sino_ptr
->offset
= temp
->i
.offset
;
746 sino_ptr
->totlen
= temp
->i
.totlen
;
748 wpage
+= JFFS2_SUMMARY_INODE_SIZE
;
753 case JFFS2_NODETYPE_DIRENT
: {
754 struct jffs2_sum_dirent_flash
*sdrnt_ptr
= wpage
;
756 sdrnt_ptr
->nodetype
= temp
->d
.nodetype
;
757 sdrnt_ptr
->totlen
= temp
->d
.totlen
;
758 sdrnt_ptr
->offset
= temp
->d
.offset
;
759 sdrnt_ptr
->pino
= temp
->d
.pino
;
760 sdrnt_ptr
->version
= temp
->d
.version
;
761 sdrnt_ptr
->ino
= temp
->d
.ino
;
762 sdrnt_ptr
->nsize
= temp
->d
.nsize
;
763 sdrnt_ptr
->type
= temp
->d
.type
;
765 memcpy(sdrnt_ptr
->name
, temp
->d
.name
,
768 wpage
+= JFFS2_SUMMARY_DIRENT_SIZE(temp
->d
.nsize
);
772 #ifdef CONFIG_JFFS2_FS_XATTR
773 case JFFS2_NODETYPE_XATTR
: {
774 struct jffs2_sum_xattr_flash
*sxattr_ptr
= wpage
;
776 temp
= c
->summary
->sum_list_head
;
777 sxattr_ptr
->nodetype
= temp
->x
.nodetype
;
778 sxattr_ptr
->xid
= temp
->x
.xid
;
779 sxattr_ptr
->version
= temp
->x
.version
;
780 sxattr_ptr
->offset
= temp
->x
.offset
;
781 sxattr_ptr
->totlen
= temp
->x
.totlen
;
783 wpage
+= JFFS2_SUMMARY_XATTR_SIZE
;
786 case JFFS2_NODETYPE_XREF
: {
787 struct jffs2_sum_xref_flash
*sxref_ptr
= wpage
;
789 temp
= c
->summary
->sum_list_head
;
790 sxref_ptr
->nodetype
= temp
->r
.nodetype
;
791 sxref_ptr
->offset
= temp
->r
.offset
;
793 wpage
+= JFFS2_SUMMARY_XREF_SIZE
;
798 if ((je16_to_cpu(temp
->u
.nodetype
) & JFFS2_COMPAT_MASK
)
799 == JFFS2_FEATURE_RWCOMPAT_COPY
) {
800 dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
801 je16_to_cpu(temp
->u
.nodetype
));
802 jffs2_sum_disable_collecting(c
->summary
);
804 BUG(); /* unknown node in summary information */
809 c
->summary
->sum_list_head
= temp
->u
.next
;
812 c
->summary
->sum_num
--;
815 jffs2_sum_reset_collected(c
->summary
);
820 sm
->offset
= cpu_to_je32(c
->sector_size
- jeb
->free_size
);
821 sm
->magic
= cpu_to_je32(JFFS2_SUM_MAGIC
);
823 isum
.sum_crc
= cpu_to_je32(crc32(0, c
->summary
->sum_buf
, datasize
));
824 isum
.node_crc
= cpu_to_je32(crc32(0, &isum
, sizeof(isum
) - 8));
826 vecs
[0].iov_base
= &isum
;
827 vecs
[0].iov_len
= sizeof(isum
);
828 vecs
[1].iov_base
= c
->summary
->sum_buf
;
829 vecs
[1].iov_len
= datasize
;
831 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
832 jeb
->offset
+ c
->sector_size
- jeb
->free_size
);
834 spin_unlock(&c
->erase_completion_lock
);
835 ret
= jffs2_flash_writev(c
, vecs
, 2, jeb
->offset
+ c
->sector_size
-
836 jeb
->free_size
, &retlen
, 0);
837 spin_lock(&c
->erase_completion_lock
);
840 if (ret
|| (retlen
!= infosize
)) {
841 JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
842 infosize
, jeb
->offset
+ c
->sector_size
- jeb
->free_size
, ret
, retlen
);
844 c
->summary
->sum_size
= JFFS2_SUMMARY_NOSUM_SIZE
;
845 jffs2_scan_dirty_space(c
, jeb
, infosize
);
853 /* Write out summary information - called from jffs2_do_reserve_space */
855 int jffs2_sum_write_sumnode(struct jffs2_sb_info
*c
)
857 struct jffs2_raw_node_ref
*summary_ref
;
858 int datasize
, infosize
, padsize
, ret
;
859 struct jffs2_eraseblock
*jeb
;
861 dbg_summary("called\n");
865 if (!c
->summary
->sum_num
|| !c
->summary
->sum_list_head
) {
866 JFFS2_WARNING("Empty summary info!!!\n");
870 datasize
= c
->summary
->sum_size
+ sizeof(struct jffs2_sum_marker
);
871 infosize
= sizeof(struct jffs2_raw_summary
) + datasize
;
872 padsize
= jeb
->free_size
- infosize
;
876 /* Is there enough space for summary? */
878 /* don't try to write out summary for this jeb */
879 jffs2_sum_disable_collecting(c
->summary
);
881 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize
);
885 ret
= jffs2_sum_write_data(c
, jeb
, infosize
, datasize
, padsize
);
887 return 0; /* can't write out summary, block is marked as NOSUM_SIZE */
889 /* for ACCT_PARANOIA_CHECK */
890 spin_unlock(&c
->erase_completion_lock
);
891 summary_ref
= jffs2_alloc_raw_node_ref();
892 spin_lock(&c
->erase_completion_lock
);
895 JFFS2_NOTICE("Failed to allocate node ref for summary\n");
899 summary_ref
->next_in_ino
= NULL
;
900 summary_ref
->flash_offset
= (jeb
->offset
+ c
->sector_size
- jeb
->free_size
) | REF_NORMAL
;
902 jffs2_link_node_ref(c
, jeb
, summary_ref
, infosize
);