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 * 2006 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 = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
32 JFFS2_WARNING("Can't allocate memory for summary information!\n");
36 c->summary->sum_buf = vmalloc(c->sector_size);
38 if (!c->summary->sum_buf) {
39 JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
44 dbg_summary("returned successfully\n");
49 void jffs2_sum_exit(struct jffs2_sb_info *c)
51 dbg_summary("called\n");
53 jffs2_sum_disable_collecting(c->summary);
55 vfree(c->summary->sum_buf);
56 c->summary->sum_buf = NULL;
62 static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
64 if (!s->sum_list_head)
65 s->sum_list_head = (union jffs2_sum_mem *) item;
67 s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
68 s->sum_list_tail = (union jffs2_sum_mem *) item;
70 switch (je16_to_cpu(item->u.nodetype)) {
71 case JFFS2_NODETYPE_INODE:
72 s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
74 dbg_summary("inode (%u) added to summary\n",
75 je32_to_cpu(item->i.inode));
77 case JFFS2_NODETYPE_DIRENT:
78 s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
80 dbg_summary("dirent (%u) added to summary\n",
81 je32_to_cpu(item->d.ino));
83 #ifdef CONFIG_JFFS2_FS_XATTR
84 case JFFS2_NODETYPE_XATTR:
85 s->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
87 dbg_summary("xattr (xid=%u, version=%u) added to summary\n",
88 je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version));
90 case JFFS2_NODETYPE_XREF:
91 s->sum_size += JFFS2_SUMMARY_XREF_SIZE;
93 dbg_summary("xref added to summary\n");
97 JFFS2_WARNING("UNKNOWN node type %u\n",
98 je16_to_cpu(item->u.nodetype));
105 /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */
107 int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size)
109 dbg_summary("called with %u\n", size);
110 s->sum_padded += size;
114 int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri,
117 struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
122 temp->nodetype = ri->nodetype;
123 temp->inode = ri->ino;
124 temp->version = ri->version;
125 temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */
126 temp->totlen = ri->totlen;
129 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
132 int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd,
135 struct jffs2_sum_dirent_mem *temp =
136 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL);
141 temp->nodetype = rd->nodetype;
142 temp->totlen = rd->totlen;
143 temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */
144 temp->pino = rd->pino;
145 temp->version = rd->version;
147 temp->nsize = rd->nsize;
148 temp->type = rd->type;
151 memcpy(temp->name, rd->name, rd->nsize);
153 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
156 #ifdef CONFIG_JFFS2_FS_XATTR
157 int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs)
159 struct jffs2_sum_xattr_mem *temp;
161 temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
165 temp->nodetype = rx->nodetype;
167 temp->version = rx->version;
168 temp->offset = cpu_to_je32(ofs);
169 temp->totlen = rx->totlen;
172 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
175 int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs)
177 struct jffs2_sum_xref_mem *temp;
179 temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
183 temp->nodetype = rr->nodetype;
184 temp->offset = cpu_to_je32(ofs);
187 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
190 /* Cleanup every collected summary information */
192 static void jffs2_sum_clean_collected(struct jffs2_summary *s)
194 union jffs2_sum_mem *temp;
196 if (!s->sum_list_head) {
197 dbg_summary("already empty\n");
199 while (s->sum_list_head) {
200 temp = s->sum_list_head;
201 s->sum_list_head = s->sum_list_head->u.next;
204 s->sum_list_tail = NULL;
209 void jffs2_sum_reset_collected(struct jffs2_summary *s)
211 dbg_summary("called\n");
212 jffs2_sum_clean_collected(s);
216 void jffs2_sum_disable_collecting(struct jffs2_summary *s)
218 dbg_summary("called\n");
219 jffs2_sum_clean_collected(s);
220 s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
223 int jffs2_sum_is_disabled(struct jffs2_summary *s)
225 return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE);
228 /* Move the collected summary information into sb (called from scan.c) */
230 void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
232 dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
233 c->summary->sum_size, c->summary->sum_num,
234 s->sum_size, s->sum_num);
236 c->summary->sum_size = s->sum_size;
237 c->summary->sum_num = s->sum_num;
238 c->summary->sum_padded = s->sum_padded;
239 c->summary->sum_list_head = s->sum_list_head;
240 c->summary->sum_list_tail = s->sum_list_tail;
242 s->sum_list_head = s->sum_list_tail = NULL;
245 /* Called from wbuf.c to collect writed node info */
247 int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
248 unsigned long count, uint32_t ofs)
250 union jffs2_node_union *node;
251 struct jffs2_eraseblock *jeb;
253 if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) {
254 dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n");
258 node = invecs[0].iov_base;
259 jeb = &c->blocks[ofs / c->sector_size];
262 switch (je16_to_cpu(node->u.nodetype)) {
263 case JFFS2_NODETYPE_INODE: {
264 struct jffs2_sum_inode_mem *temp =
265 kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
270 temp->nodetype = node->i.nodetype;
271 temp->inode = node->i.ino;
272 temp->version = node->i.version;
273 temp->offset = cpu_to_je32(ofs);
274 temp->totlen = node->i.totlen;
277 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
280 case JFFS2_NODETYPE_DIRENT: {
281 struct jffs2_sum_dirent_mem *temp =
282 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL);
287 temp->nodetype = node->d.nodetype;
288 temp->totlen = node->d.totlen;
289 temp->offset = cpu_to_je32(ofs);
290 temp->pino = node->d.pino;
291 temp->version = node->d.version;
292 temp->ino = node->d.ino;
293 temp->nsize = node->d.nsize;
294 temp->type = node->d.type;
299 memcpy(temp->name,node->d.name,node->d.nsize);
303 memcpy(temp->name,invecs[1].iov_base,node->d.nsize);
307 BUG(); /* impossible count value */
311 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
313 #ifdef CONFIG_JFFS2_FS_XATTR
314 case JFFS2_NODETYPE_XATTR: {
315 struct jffs2_sum_xattr_mem *temp;
316 temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
320 temp->nodetype = node->x.nodetype;
321 temp->xid = node->x.xid;
322 temp->version = node->x.version;
323 temp->totlen = node->x.totlen;
324 temp->offset = cpu_to_je32(ofs);
327 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
329 case JFFS2_NODETYPE_XREF: {
330 struct jffs2_sum_xref_mem *temp;
331 temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
334 temp->nodetype = node->r.nodetype;
335 temp->offset = cpu_to_je32(ofs);
338 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
341 case JFFS2_NODETYPE_PADDING:
342 dbg_summary("node PADDING\n");
343 c->summary->sum_padded += je32_to_cpu(node->u.totlen);
346 case JFFS2_NODETYPE_CLEANMARKER:
347 dbg_summary("node CLEANMARKER\n");
350 case JFFS2_NODETYPE_SUMMARY:
351 dbg_summary("node SUMMARY\n");
355 /* If you implement a new node type you should also implement
356 summary support for it or disable summary.
365 JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
369 static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
370 struct jffs2_eraseblock *jeb,
371 uint32_t ofs, uint32_t len,
372 struct jffs2_inode_cache *ic)
374 /* If there was a gap, mark it dirty */
375 if ((ofs & ~3) > c->sector_size - jeb->free_size) {
376 /* Ew. Summary doesn't actually tell us explicitly about dirty space */
377 jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size));
380 return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic);
383 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
385 static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
386 struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
388 struct jffs2_inode_cache *ic;
389 struct jffs2_full_dirent *fd;
396 for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
397 dbg_summary("processing summary index %d\n", i);
399 /* Make sure there's a spare ref for dirty space */
400 err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
404 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
405 case JFFS2_NODETYPE_INODE: {
406 struct jffs2_sum_inode_flash *spi;
409 ino = je32_to_cpu(spi->inode);
411 dbg_summary("Inode at 0x%08x-0x%08x\n",
412 jeb->offset + je32_to_cpu(spi->offset),
413 jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
415 ic = jffs2_scan_make_ino_cache(c, ino);
417 JFFS2_NOTICE("scan_make_ino_cache failed\n");
421 sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
422 PAD(je32_to_cpu(spi->totlen)), ic);
424 *pseudo_random += je32_to_cpu(spi->version);
426 sp += JFFS2_SUMMARY_INODE_SIZE;
431 case JFFS2_NODETYPE_DIRENT: {
432 struct jffs2_sum_dirent_flash *spd;
435 dbg_summary("Dirent at 0x%08x-0x%08x\n",
436 jeb->offset + je32_to_cpu(spd->offset),
437 jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
440 fd = jffs2_alloc_full_dirent(spd->nsize+1);
444 memcpy(&fd->name, spd->name, spd->nsize);
445 fd->name[spd->nsize] = 0;
447 ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
449 jffs2_free_full_dirent(fd);
453 fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED,
454 PAD(je32_to_cpu(spd->totlen)), ic);
457 fd->version = je32_to_cpu(spd->version);
458 fd->ino = je32_to_cpu(spd->ino);
459 fd->nhash = full_name_hash(fd->name, spd->nsize);
460 fd->type = spd->type;
462 jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
464 *pseudo_random += je32_to_cpu(spd->version);
466 sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
470 #ifdef CONFIG_JFFS2_FS_XATTR
471 case JFFS2_NODETYPE_XATTR: {
472 struct jffs2_xattr_datum *xd;
473 struct jffs2_sum_xattr_flash *spx;
475 spx = (struct jffs2_sum_xattr_flash *)sp;
476 dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n",
477 jeb->offset + je32_to_cpu(spx->offset),
478 jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
479 je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
481 xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
482 je32_to_cpu(spx->version));
485 if (xd->version > je32_to_cpu(spx->version)) {
486 /* node is not the newest one */
487 struct jffs2_raw_node_ref *raw
488 = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
489 PAD(je32_to_cpu(spx->totlen)), NULL);
490 raw->next_in_ino = xd->node->next_in_ino;
491 xd->node->next_in_ino = raw;
493 xd->version = je32_to_cpu(spx->version);
494 sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
495 PAD(je32_to_cpu(spx->totlen)), (void *)xd);
497 *pseudo_random += je32_to_cpu(spx->xid);
498 sp += JFFS2_SUMMARY_XATTR_SIZE;
502 case JFFS2_NODETYPE_XREF: {
503 struct jffs2_xattr_ref *ref;
504 struct jffs2_sum_xref_flash *spr;
506 spr = (struct jffs2_sum_xref_flash *)sp;
507 dbg_summary("xref at %#08x-%#08x\n",
508 jeb->offset + je32_to_cpu(spr->offset),
509 jeb->offset + je32_to_cpu(spr->offset) +
510 (uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
512 ref = jffs2_alloc_xattr_ref();
514 JFFS2_NOTICE("allocation of xattr_datum failed\n");
517 ref->next = c->xref_temp;
520 sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
521 PAD(sizeof(struct jffs2_raw_xref)), (void *)ref);
523 *pseudo_random += ref->node->flash_offset;
524 sp += JFFS2_SUMMARY_XREF_SIZE;
530 uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
531 JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
532 if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
535 /* For compatible node types, just fall back to the full scan */
536 c->wasted_size -= jeb->wasted_size;
537 c->free_size += c->sector_size - jeb->free_size;
538 c->used_size -= jeb->used_size;
539 c->dirty_size -= jeb->dirty_size;
540 jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
541 jeb->free_size = c->sector_size;
543 jffs2_free_jeb_node_refs(c, jeb);
544 return -ENOTRECOVERABLE;
551 /* Process the summary node - called from jffs2_scan_eraseblock() */
552 int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
553 struct jffs2_raw_summary *summary, uint32_t sumsize,
554 uint32_t *pseudo_random)
556 struct jffs2_unknown_node crcnode;
560 ofs = c->sector_size - sumsize;
562 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
563 jeb->offset, jeb->offset + ofs, sumsize);
565 /* OK, now check for node validity and CRC */
566 crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
567 crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
568 crcnode.totlen = summary->totlen;
569 crc = crc32(0, &crcnode, sizeof(crcnode)-4);
571 if (je32_to_cpu(summary->hdr_crc) != crc) {
572 dbg_summary("Summary node header is corrupt (bad CRC or "
573 "no summary at all)\n");
577 if (je32_to_cpu(summary->totlen) != sumsize) {
578 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
582 crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
584 if (je32_to_cpu(summary->node_crc) != crc) {
585 dbg_summary("Summary node is corrupt (bad CRC)\n");
589 crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
591 if (je32_to_cpu(summary->sum_crc) != crc) {
592 dbg_summary("Summary node data is corrupt (bad CRC)\n");
596 if ( je32_to_cpu(summary->cln_mkr) ) {
598 dbg_summary("Summary : CLEANMARKER node \n");
600 ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
604 if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
605 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
606 je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
607 if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
609 } else if (jeb->first_node) {
610 dbg_summary("CLEANMARKER node not first node in block "
611 "(0x%08x)\n", jeb->offset);
612 if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
615 jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL,
616 je32_to_cpu(summary->cln_mkr), NULL);
620 ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
621 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
622 scan of this eraseblock. So return zero */
623 if (ret == -ENOTRECOVERABLE)
626 return ret; /* real error */
628 /* for PARANOIA_CHECK */
629 ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
633 sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);
635 if (unlikely(jeb->free_size)) {
636 JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
637 jeb->free_size, jeb->offset);
638 jeb->wasted_size += jeb->free_size;
639 c->wasted_size += jeb->free_size;
640 c->free_size -= jeb->free_size;
644 return jffs2_scan_classify_jeb(c, jeb);
647 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
652 /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
654 static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
655 uint32_t infosize, uint32_t datasize, int padsize)
657 struct jffs2_raw_summary isum;
658 union jffs2_sum_mem *temp;
659 struct jffs2_sum_marker *sm;
666 memset(c->summary->sum_buf, 0xff, datasize);
667 memset(&isum, 0, sizeof(isum));
669 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
670 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
671 isum.totlen = cpu_to_je32(infosize);
672 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
673 isum.padded = cpu_to_je32(c->summary->sum_padded);
674 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
675 isum.sum_num = cpu_to_je32(c->summary->sum_num);
676 wpage = c->summary->sum_buf;
678 while (c->summary->sum_num) {
679 temp = c->summary->sum_list_head;
681 switch (je16_to_cpu(temp->u.nodetype)) {
682 case JFFS2_NODETYPE_INODE: {
683 struct jffs2_sum_inode_flash *sino_ptr = wpage;
685 sino_ptr->nodetype = temp->i.nodetype;
686 sino_ptr->inode = temp->i.inode;
687 sino_ptr->version = temp->i.version;
688 sino_ptr->offset = temp->i.offset;
689 sino_ptr->totlen = temp->i.totlen;
691 wpage += JFFS2_SUMMARY_INODE_SIZE;
696 case JFFS2_NODETYPE_DIRENT: {
697 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
699 sdrnt_ptr->nodetype = temp->d.nodetype;
700 sdrnt_ptr->totlen = temp->d.totlen;
701 sdrnt_ptr->offset = temp->d.offset;
702 sdrnt_ptr->pino = temp->d.pino;
703 sdrnt_ptr->version = temp->d.version;
704 sdrnt_ptr->ino = temp->d.ino;
705 sdrnt_ptr->nsize = temp->d.nsize;
706 sdrnt_ptr->type = temp->d.type;
708 memcpy(sdrnt_ptr->name, temp->d.name,
711 wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
715 #ifdef CONFIG_JFFS2_FS_XATTR
716 case JFFS2_NODETYPE_XATTR: {
717 struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
719 temp = c->summary->sum_list_head;
720 sxattr_ptr->nodetype = temp->x.nodetype;
721 sxattr_ptr->xid = temp->x.xid;
722 sxattr_ptr->version = temp->x.version;
723 sxattr_ptr->offset = temp->x.offset;
724 sxattr_ptr->totlen = temp->x.totlen;
726 wpage += JFFS2_SUMMARY_XATTR_SIZE;
729 case JFFS2_NODETYPE_XREF: {
730 struct jffs2_sum_xref_flash *sxref_ptr = wpage;
732 temp = c->summary->sum_list_head;
733 sxref_ptr->nodetype = temp->r.nodetype;
734 sxref_ptr->offset = temp->r.offset;
736 wpage += JFFS2_SUMMARY_XREF_SIZE;
741 if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
742 == JFFS2_FEATURE_RWCOMPAT_COPY) {
743 dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
744 je16_to_cpu(temp->u.nodetype));
745 jffs2_sum_disable_collecting(c->summary);
747 BUG(); /* unknown node in summary information */
752 c->summary->sum_list_head = temp->u.next;
755 c->summary->sum_num--;
758 jffs2_sum_reset_collected(c->summary);
763 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
764 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
766 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
767 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
769 vecs[0].iov_base = &isum;
770 vecs[0].iov_len = sizeof(isum);
771 vecs[1].iov_base = c->summary->sum_buf;
772 vecs[1].iov_len = datasize;
774 sum_ofs = jeb->offset + c->sector_size - jeb->free_size;
776 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
779 ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);
781 if (ret || (retlen != infosize)) {
783 JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
784 infosize, sum_ofs, ret, retlen);
787 /* Waste remaining space */
788 spin_lock(&c->erase_completion_lock);
789 jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
790 spin_unlock(&c->erase_completion_lock);
793 c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
798 spin_lock(&c->erase_completion_lock);
799 jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
800 spin_unlock(&c->erase_completion_lock);
805 /* Write out summary information - called from jffs2_do_reserve_space */
807 int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
809 int datasize, infosize, padsize;
810 struct jffs2_eraseblock *jeb;
813 dbg_summary("called\n");
815 spin_unlock(&c->erase_completion_lock);
818 jffs2_prealloc_raw_node_refs(c, jeb, 1);
820 if (!c->summary->sum_num || !c->summary->sum_list_head) {
821 JFFS2_WARNING("Empty summary info!!!\n");
825 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
826 infosize = sizeof(struct jffs2_raw_summary) + datasize;
827 padsize = jeb->free_size - infosize;
831 /* Is there enough space for summary? */
833 /* don't try to write out summary for this jeb */
834 jffs2_sum_disable_collecting(c->summary);
836 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
837 spin_lock(&c->erase_completion_lock);
841 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
842 spin_lock(&c->erase_completion_lock);