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!");
373 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
375 static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
376 struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
378 struct jffs2_raw_node_ref *raw;
379 struct jffs2_inode_cache *ic;
380 struct jffs2_full_dirent *fd;
386 for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
387 dbg_summary("processing summary index %d\n", i);
389 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
390 case JFFS2_NODETYPE_INODE: {
391 struct jffs2_sum_inode_flash *spi;
394 ino = je32_to_cpu(spi->inode);
396 dbg_summary("Inode at 0x%08x\n",
397 jeb->offset + je32_to_cpu(spi->offset));
399 raw = jffs2_alloc_raw_node_ref();
401 JFFS2_NOTICE("allocation of node reference failed\n");
405 ic = jffs2_scan_make_ino_cache(c, ino);
407 JFFS2_NOTICE("scan_make_ino_cache failed\n");
408 jffs2_free_raw_node_ref(raw);
412 raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
414 raw->next_in_ino = ic->nodes;
417 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spi->totlen)));
419 *pseudo_random += je32_to_cpu(spi->version);
421 sp += JFFS2_SUMMARY_INODE_SIZE;
426 case JFFS2_NODETYPE_DIRENT: {
427 struct jffs2_sum_dirent_flash *spd;
430 dbg_summary("Dirent at 0x%08x\n",
431 jeb->offset + je32_to_cpu(spd->offset));
433 fd = jffs2_alloc_full_dirent(spd->nsize+1);
437 memcpy(&fd->name, spd->name, spd->nsize);
438 fd->name[spd->nsize] = 0;
440 raw = jffs2_alloc_raw_node_ref();
442 jffs2_free_full_dirent(fd);
443 JFFS2_NOTICE("allocation of node reference failed\n");
447 ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
449 jffs2_free_full_dirent(fd);
450 jffs2_free_raw_node_ref(raw);
454 raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
455 raw->next_in_ino = ic->nodes;
458 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spd->totlen)));
462 fd->version = je32_to_cpu(spd->version);
463 fd->ino = je32_to_cpu(spd->ino);
464 fd->nhash = full_name_hash(fd->name, spd->nsize);
465 fd->type = spd->type;
467 jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
469 *pseudo_random += je32_to_cpu(spd->version);
471 sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
475 #ifdef CONFIG_JFFS2_FS_XATTR
476 case JFFS2_NODETYPE_XATTR: {
477 struct jffs2_xattr_datum *xd;
478 struct jffs2_sum_xattr_flash *spx;
481 spx = (struct jffs2_sum_xattr_flash *)sp;
482 ofs = jeb->offset + je32_to_cpu(spx->offset);
483 dbg_summary("xattr at %#08x (xid=%u, version=%u)\n", ofs,
484 je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
485 raw = jffs2_alloc_raw_node_ref();
487 JFFS2_NOTICE("allocation of node reference failed\n");
491 xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
492 je32_to_cpu(spx->version));
494 jffs2_free_raw_node_ref(raw);
495 if (PTR_ERR(xd) == -EEXIST) {
496 /* a newer version of xd exists */
497 DIRTY_SPACE(je32_to_cpu(spx->totlen));
498 sp += JFFS2_SUMMARY_XATTR_SIZE;
501 JFFS2_NOTICE("allocation of xattr_datum failed\n");
507 raw->flash_offset = ofs | REF_UNCHECKED;
508 raw->next_in_ino = (void *)xd;
510 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spx->totlen)));
512 *pseudo_random += je32_to_cpu(spx->xid);
513 sp += JFFS2_SUMMARY_XATTR_SIZE;
517 case JFFS2_NODETYPE_XREF: {
518 struct jffs2_xattr_ref *ref;
519 struct jffs2_sum_xref_flash *spr;
522 spr = (struct jffs2_sum_xref_flash *)sp;
523 ofs = jeb->offset + je32_to_cpu(spr->offset);
524 dbg_summary("xref at %#08x (xid=%u, ino=%u)\n", ofs,
525 je32_to_cpu(spr->xid), je32_to_cpu(spr->ino));
526 raw = jffs2_alloc_raw_node_ref();
528 JFFS2_NOTICE("allocation of node reference failed\n");
532 ref = jffs2_alloc_xattr_ref();
534 JFFS2_NOTICE("allocation of xattr_datum failed\n");
535 jffs2_free_raw_node_ref(raw);
539 ref->ino = 0xfffffffe;
540 ref->xid = 0xfffffffd;
542 ref->next = c->xref_temp;
545 raw->flash_offset = ofs | REF_UNCHECKED;
546 raw->next_in_ino = (void *)ref;
548 jffs2_link_node_ref(c, jeb, raw, PAD(sizeof(struct jffs2_raw_xref)));
550 *pseudo_random += ofs;
551 sp += JFFS2_SUMMARY_XREF_SIZE;
557 uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
558 JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
559 if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
562 /* For compatible node types, just fall back to the full scan */
563 c->wasted_size -= jeb->wasted_size;
564 c->free_size += c->sector_size - jeb->free_size;
565 c->used_size -= jeb->used_size;
566 c->dirty_size -= jeb->dirty_size;
567 jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
568 jeb->free_size = c->sector_size;
570 jffs2_free_all_node_refs(c, jeb);
571 return -ENOTRECOVERABLE;
579 /* Process the summary node - called from jffs2_scan_eraseblock() */
580 int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
581 struct jffs2_raw_summary *summary, uint32_t sumsize,
582 uint32_t *pseudo_random)
584 struct jffs2_unknown_node crcnode;
585 struct jffs2_raw_node_ref *cache_ref;
589 ofs = jeb->offset + c->sector_size - sumsize;
591 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
592 jeb->offset, ofs, sumsize);
594 /* OK, now check for node validity and CRC */
595 crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
596 crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
597 crcnode.totlen = summary->totlen;
598 crc = crc32(0, &crcnode, sizeof(crcnode)-4);
600 if (je32_to_cpu(summary->hdr_crc) != crc) {
601 dbg_summary("Summary node header is corrupt (bad CRC or "
602 "no summary at all)\n");
606 if (je32_to_cpu(summary->totlen) != sumsize) {
607 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
611 crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
613 if (je32_to_cpu(summary->node_crc) != crc) {
614 dbg_summary("Summary node is corrupt (bad CRC)\n");
618 crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
620 if (je32_to_cpu(summary->sum_crc) != crc) {
621 dbg_summary("Summary node data is corrupt (bad CRC)\n");
625 if ( je32_to_cpu(summary->cln_mkr) ) {
627 dbg_summary("Summary : CLEANMARKER node \n");
629 if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
630 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
631 je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
632 DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
633 } else if (jeb->first_node) {
634 dbg_summary("CLEANMARKER node not first node in block "
635 "(0x%08x)\n", jeb->offset);
636 DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
638 struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
641 JFFS2_NOTICE("Failed to allocate node ref for clean marker\n");
645 marker_ref->flash_offset = jeb->offset | REF_NORMAL;
646 marker_ref->next_in_ino = NULL;
648 jffs2_link_node_ref(c, jeb, marker_ref, je32_to_cpu(summary->cln_mkr));
652 if (je32_to_cpu(summary->padded)) {
653 DIRTY_SPACE(je32_to_cpu(summary->padded));
656 ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
657 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
658 scan of this eraseblock. So return zero */
659 if (ret == -ENOTRECOVERABLE)
662 return ret; /* real error */
664 /* for PARANOIA_CHECK */
665 cache_ref = jffs2_alloc_raw_node_ref();
668 JFFS2_NOTICE("Failed to allocate node ref for cache\n");
672 cache_ref->next_in_ino = NULL;
673 cache_ref->next_phys = NULL;
674 cache_ref->flash_offset = ofs | REF_NORMAL;
676 jffs2_link_node_ref(c, jeb, cache_ref, sumsize);
678 jeb->wasted_size += jeb->free_size;
679 c->wasted_size += jeb->free_size;
680 c->free_size -= jeb->free_size;
683 return jffs2_scan_classify_jeb(c, jeb);
686 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
691 /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
693 static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
694 uint32_t infosize, uint32_t datasize, int padsize)
696 struct jffs2_raw_summary isum;
697 union jffs2_sum_mem *temp;
698 struct jffs2_sum_marker *sm;
704 memset(c->summary->sum_buf, 0xff, datasize);
705 memset(&isum, 0, sizeof(isum));
707 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
708 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
709 isum.totlen = cpu_to_je32(infosize);
710 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
711 isum.padded = cpu_to_je32(c->summary->sum_padded);
712 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
713 isum.sum_num = cpu_to_je32(c->summary->sum_num);
714 wpage = c->summary->sum_buf;
716 while (c->summary->sum_num) {
717 temp = c->summary->sum_list_head;
719 switch (je16_to_cpu(temp->u.nodetype)) {
720 case JFFS2_NODETYPE_INODE: {
721 struct jffs2_sum_inode_flash *sino_ptr = wpage;
723 sino_ptr->nodetype = temp->i.nodetype;
724 sino_ptr->inode = temp->i.inode;
725 sino_ptr->version = temp->i.version;
726 sino_ptr->offset = temp->i.offset;
727 sino_ptr->totlen = temp->i.totlen;
729 wpage += JFFS2_SUMMARY_INODE_SIZE;
734 case JFFS2_NODETYPE_DIRENT: {
735 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
737 sdrnt_ptr->nodetype = temp->d.nodetype;
738 sdrnt_ptr->totlen = temp->d.totlen;
739 sdrnt_ptr->offset = temp->d.offset;
740 sdrnt_ptr->pino = temp->d.pino;
741 sdrnt_ptr->version = temp->d.version;
742 sdrnt_ptr->ino = temp->d.ino;
743 sdrnt_ptr->nsize = temp->d.nsize;
744 sdrnt_ptr->type = temp->d.type;
746 memcpy(sdrnt_ptr->name, temp->d.name,
749 wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
753 #ifdef CONFIG_JFFS2_FS_XATTR
754 case JFFS2_NODETYPE_XATTR: {
755 struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
757 temp = c->summary->sum_list_head;
758 sxattr_ptr->nodetype = temp->x.nodetype;
759 sxattr_ptr->xid = temp->x.xid;
760 sxattr_ptr->version = temp->x.version;
761 sxattr_ptr->offset = temp->x.offset;
762 sxattr_ptr->totlen = temp->x.totlen;
764 wpage += JFFS2_SUMMARY_XATTR_SIZE;
767 case JFFS2_NODETYPE_XREF: {
768 struct jffs2_sum_xref_flash *sxref_ptr = wpage;
770 temp = c->summary->sum_list_head;
771 sxref_ptr->nodetype = temp->r.nodetype;
772 sxref_ptr->offset = temp->r.offset;
774 wpage += JFFS2_SUMMARY_XREF_SIZE;
779 if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
780 == JFFS2_FEATURE_RWCOMPAT_COPY) {
781 dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
782 je16_to_cpu(temp->u.nodetype));
783 jffs2_sum_disable_collecting(c->summary);
785 BUG(); /* unknown node in summary information */
790 c->summary->sum_list_head = temp->u.next;
793 c->summary->sum_num--;
796 jffs2_sum_reset_collected(c->summary);
801 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
802 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
804 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
805 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
807 vecs[0].iov_base = &isum;
808 vecs[0].iov_len = sizeof(isum);
809 vecs[1].iov_base = c->summary->sum_buf;
810 vecs[1].iov_len = datasize;
812 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
813 jeb->offset + c->sector_size - jeb->free_size);
815 spin_unlock(&c->erase_completion_lock);
816 ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size -
817 jeb->free_size, &retlen, 0);
818 spin_lock(&c->erase_completion_lock);
821 if (ret || (retlen != infosize)) {
822 JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
823 infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen);
825 c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
826 DIRTY_SPACE(infosize);
834 /* Write out summary information - called from jffs2_do_reserve_space */
836 int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
838 struct jffs2_raw_node_ref *summary_ref;
839 int datasize, infosize, padsize, ret;
840 struct jffs2_eraseblock *jeb;
842 dbg_summary("called\n");
846 if (!c->summary->sum_num || !c->summary->sum_list_head) {
847 JFFS2_WARNING("Empty summary info!!!\n");
851 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
852 infosize = sizeof(struct jffs2_raw_summary) + datasize;
853 padsize = jeb->free_size - infosize;
857 /* Is there enough space for summary? */
859 /* don't try to write out summary for this jeb */
860 jffs2_sum_disable_collecting(c->summary);
862 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
866 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
868 return 0; /* can't write out summary, block is marked as NOSUM_SIZE */
870 /* for ACCT_PARANOIA_CHECK */
871 spin_unlock(&c->erase_completion_lock);
872 summary_ref = jffs2_alloc_raw_node_ref();
873 spin_lock(&c->erase_completion_lock);
876 JFFS2_NOTICE("Failed to allocate node ref for summary\n");
880 summary_ref->next_in_ino = NULL;
881 summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL;
883 jffs2_link_node_ref(c, jeb, summary_ref, infosize);