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Ferenc Havasie631ddb2005-09-07 09:35:26 +01001/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
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
KaiGai Kohei332a6b92006-06-24 09:17:42 +09008 * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com>
Ferenc Havasie631ddb2005-09-07 09:35:26 +01009 *
10 * For licensing information, see the file 'LICENCE' in this directory.
11 *
Ferenc Havasi2bc97642005-09-26 12:37:25 +010012 * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $
Ferenc Havasie631ddb2005-09-07 09:35:26 +010013 *
14 */
15
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>
24#include "nodelist.h"
25#include "debug.h"
26
27int jffs2_sum_init(struct jffs2_sb_info *c)
28{
29 c->summary = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
30
31 if (!c->summary) {
32 JFFS2_WARNING("Can't allocate memory for summary information!\n");
33 return -ENOMEM;
34 }
35
36 memset(c->summary, 0, sizeof(struct jffs2_summary));
37
38 c->summary->sum_buf = vmalloc(c->sector_size);
39
40 if (!c->summary->sum_buf) {
41 JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +010042 kfree(c->summary);
Ferenc Havasie631ddb2005-09-07 09:35:26 +010043 return -ENOMEM;
44 }
45
Andreas Mohrd6e05ed2006-06-26 18:35:02 +020046 dbg_summary("returned successfully\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +010047
48 return 0;
49}
50
51void jffs2_sum_exit(struct jffs2_sb_info *c)
52{
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +010053 dbg_summary("called\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +010054
55 jffs2_sum_disable_collecting(c->summary);
56
57 vfree(c->summary->sum_buf);
58 c->summary->sum_buf = NULL;
59
60 kfree(c->summary);
61 c->summary = NULL;
62}
63
64static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
65{
66 if (!s->sum_list_head)
67 s->sum_list_head = (union jffs2_sum_mem *) item;
68 if (s->sum_list_tail)
69 s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
70 s->sum_list_tail = (union jffs2_sum_mem *) item;
71
72 switch (je16_to_cpu(item->u.nodetype)) {
73 case JFFS2_NODETYPE_INODE:
74 s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
75 s->sum_num++;
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +010076 dbg_summary("inode (%u) added to summary\n",
Ferenc Havasie631ddb2005-09-07 09:35:26 +010077 je32_to_cpu(item->i.inode));
78 break;
79 case JFFS2_NODETYPE_DIRENT:
80 s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
81 s->sum_num++;
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +010082 dbg_summary("dirent (%u) added to summary\n",
Ferenc Havasie631ddb2005-09-07 09:35:26 +010083 je32_to_cpu(item->d.ino));
84 break;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090085#ifdef CONFIG_JFFS2_FS_XATTR
86 case JFFS2_NODETYPE_XATTR:
87 s->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
88 s->sum_num++;
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));
91 break;
92 case JFFS2_NODETYPE_XREF:
93 s->sum_size += JFFS2_SUMMARY_XREF_SIZE;
94 s->sum_num++;
95 dbg_summary("xref added to summary\n");
96 break;
97#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +010098 default:
Thomas Gleixner182ec4e2005-11-07 11:16:07 +000099 JFFS2_WARNING("UNKNOWN node type %u\n",
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100100 je16_to_cpu(item->u.nodetype));
101 return 1;
102 }
103 return 0;
104}
105
106
107/* The following 3 functions are called from scan.c to collect summary info for not closed jeb */
108
109int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size)
110{
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100111 dbg_summary("called with %u\n", size);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100112 s->sum_padded += size;
113 return 0;
114}
115
116int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri,
117 uint32_t ofs)
118{
119 struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
120
121 if (!temp)
122 return -ENOMEM;
123
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;
129 temp->next = NULL;
130
131 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
132}
133
134int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd,
135 uint32_t ofs)
136{
137 struct jffs2_sum_dirent_mem *temp =
138 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL);
139
140 if (!temp)
141 return -ENOMEM;
142
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;
148 temp->ino = rd->ino;
149 temp->nsize = rd->nsize;
150 temp->type = rd->type;
151 temp->next = NULL;
152
153 memcpy(temp->name, rd->name, rd->nsize);
154
155 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
156}
157
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900158#ifdef CONFIG_JFFS2_FS_XATTR
159int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs)
160{
161 struct jffs2_sum_xattr_mem *temp;
162
163 temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
164 if (!temp)
165 return -ENOMEM;
166
167 temp->nodetype = rx->nodetype;
168 temp->xid = rx->xid;
169 temp->version = rx->version;
170 temp->offset = cpu_to_je32(ofs);
171 temp->totlen = rx->totlen;
172 temp->next = NULL;
173
174 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
175}
176
177int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs)
178{
179 struct jffs2_sum_xref_mem *temp;
180
181 temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
182 if (!temp)
183 return -ENOMEM;
184
185 temp->nodetype = rr->nodetype;
186 temp->offset = cpu_to_je32(ofs);
187 temp->next = NULL;
188
189 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
190}
191#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100192/* Cleanup every collected summary information */
193
194static void jffs2_sum_clean_collected(struct jffs2_summary *s)
195{
196 union jffs2_sum_mem *temp;
197
198 if (!s->sum_list_head) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100199 dbg_summary("already empty\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100200 }
201 while (s->sum_list_head) {
202 temp = s->sum_list_head;
203 s->sum_list_head = s->sum_list_head->u.next;
204 kfree(temp);
205 }
206 s->sum_list_tail = NULL;
207 s->sum_padded = 0;
208 s->sum_num = 0;
209}
210
211void jffs2_sum_reset_collected(struct jffs2_summary *s)
212{
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100213 dbg_summary("called\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100214 jffs2_sum_clean_collected(s);
215 s->sum_size = 0;
216}
217
218void jffs2_sum_disable_collecting(struct jffs2_summary *s)
219{
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100220 dbg_summary("called\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100221 jffs2_sum_clean_collected(s);
222 s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
223}
224
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000225int jffs2_sum_is_disabled(struct jffs2_summary *s)
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100226{
227 return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE);
228}
229
230/* Move the collected summary information into sb (called from scan.c) */
231
232void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
233{
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100234 dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100235 c->summary->sum_size, c->summary->sum_num,
236 s->sum_size, s->sum_num);
237
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;
243
244 s->sum_list_head = s->sum_list_tail = NULL;
245}
246
247/* Called from wbuf.c to collect writed node info */
248
249int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
250 unsigned long count, uint32_t ofs)
251{
252 union jffs2_node_union *node;
253 struct jffs2_eraseblock *jeb;
254
Zoltan Sogor27bea322006-09-16 12:15:59 -0700255 if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) {
256 dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n");
257 return 0;
258 }
259
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100260 node = invecs[0].iov_base;
261 jeb = &c->blocks[ofs / c->sector_size];
262 ofs -= jeb->offset;
263
264 switch (je16_to_cpu(node->u.nodetype)) {
265 case JFFS2_NODETYPE_INODE: {
266 struct jffs2_sum_inode_mem *temp =
267 kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
268
269 if (!temp)
270 goto no_mem;
271
272 temp->nodetype = node->i.nodetype;
273 temp->inode = node->i.ino;
274 temp->version = node->i.version;
275 temp->offset = cpu_to_je32(ofs);
276 temp->totlen = node->i.totlen;
277 temp->next = NULL;
278
279 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
280 }
281
282 case JFFS2_NODETYPE_DIRENT: {
283 struct jffs2_sum_dirent_mem *temp =
284 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL);
285
286 if (!temp)
287 goto no_mem;
288
289 temp->nodetype = node->d.nodetype;
290 temp->totlen = node->d.totlen;
291 temp->offset = cpu_to_je32(ofs);
292 temp->pino = node->d.pino;
293 temp->version = node->d.version;
294 temp->ino = node->d.ino;
295 temp->nsize = node->d.nsize;
296 temp->type = node->d.type;
297 temp->next = NULL;
298
299 switch (count) {
300 case 1:
301 memcpy(temp->name,node->d.name,node->d.nsize);
302 break;
303
304 case 2:
305 memcpy(temp->name,invecs[1].iov_base,node->d.nsize);
306 break;
307
308 default:
309 BUG(); /* impossible count value */
310 break;
311 }
312
313 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
314 }
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900315#ifdef CONFIG_JFFS2_FS_XATTR
316 case JFFS2_NODETYPE_XATTR: {
317 struct jffs2_sum_xattr_mem *temp;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900318 temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
319 if (!temp)
320 goto no_mem;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100321
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900322 temp->nodetype = node->x.nodetype;
323 temp->xid = node->x.xid;
324 temp->version = node->x.version;
325 temp->totlen = node->x.totlen;
326 temp->offset = cpu_to_je32(ofs);
327 temp->next = NULL;
328
329 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
330 }
331 case JFFS2_NODETYPE_XREF: {
332 struct jffs2_sum_xref_mem *temp;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900333 temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
334 if (!temp)
335 goto no_mem;
336 temp->nodetype = node->r.nodetype;
337 temp->offset = cpu_to_je32(ofs);
338 temp->next = NULL;
339
340 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
341 }
342#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100343 case JFFS2_NODETYPE_PADDING:
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100344 dbg_summary("node PADDING\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100345 c->summary->sum_padded += je32_to_cpu(node->u.totlen);
346 break;
347
348 case JFFS2_NODETYPE_CLEANMARKER:
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100349 dbg_summary("node CLEANMARKER\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100350 break;
351
352 case JFFS2_NODETYPE_SUMMARY:
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100353 dbg_summary("node SUMMARY\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100354 break;
355
356 default:
357 /* If you implement a new node type you should also implement
358 summary support for it or disable summary.
359 */
360 BUG();
361 break;
362 }
363
364 return 0;
365
366no_mem:
367 JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
368 return -ENOMEM;
369}
370
David Woodhouse2f785402006-05-24 02:04:45 +0100371static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
372 struct jffs2_eraseblock *jeb,
373 uint32_t ofs, uint32_t len,
374 struct jffs2_inode_cache *ic)
David Woodhouse49f11d42006-05-21 04:00:01 +0100375{
David Woodhouse49f11d42006-05-21 04:00:01 +0100376 /* If there was a gap, mark it dirty */
David Woodhouse2f785402006-05-24 02:04:45 +0100377 if ((ofs & ~3) > c->sector_size - jeb->free_size) {
378 /* Ew. Summary doesn't actually tell us explicitly about dirty space */
379 jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size));
David Woodhouse49f11d42006-05-21 04:00:01 +0100380 }
David Woodhouse49f11d42006-05-21 04:00:01 +0100381
David Woodhouse2f785402006-05-24 02:04:45 +0100382 return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic);
David Woodhouse49f11d42006-05-21 04:00:01 +0100383}
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100384
385/* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
386
387static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
Ferenc Havasi2bc97642005-09-26 12:37:25 +0100388 struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100389{
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100390 struct jffs2_inode_cache *ic;
391 struct jffs2_full_dirent *fd;
392 void *sp;
393 int i, ino;
David Woodhouse68270992006-05-21 03:46:05 +0100394 int err;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100395
396 sp = summary->sum;
397
398 for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100399 dbg_summary("processing summary index %d\n", i);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100400
David Woodhouse2f785402006-05-24 02:04:45 +0100401 /* Make sure there's a spare ref for dirty space */
David Woodhouse046b8b92006-05-25 01:50:35 +0100402 err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
David Woodhouse2f785402006-05-24 02:04:45 +0100403 if (err)
404 return err;
405
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100406 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
407 case JFFS2_NODETYPE_INODE: {
408 struct jffs2_sum_inode_flash *spi;
409 spi = sp;
410
411 ino = je32_to_cpu(spi->inode);
412
David Woodhouse9167e0f2006-05-21 13:13:45 +0100413 dbg_summary("Inode at 0x%08x-0x%08x\n",
414 jeb->offset + je32_to_cpu(spi->offset),
David Woodhouse8b9e9fe2006-05-25 01:53:09 +0100415 jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100416
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100417 ic = jffs2_scan_make_ino_cache(c, ino);
418 if (!ic) {
419 JFFS2_NOTICE("scan_make_ino_cache failed\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100420 return -ENOMEM;
421 }
422
David Woodhouse2f785402006-05-24 02:04:45 +0100423 sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
424 PAD(je32_to_cpu(spi->totlen)), ic);
David Woodhousef1f96712006-05-20 19:45:26 +0100425
426 *pseudo_random += je32_to_cpu(spi->version);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100427
428 sp += JFFS2_SUMMARY_INODE_SIZE;
429
430 break;
431 }
432
433 case JFFS2_NODETYPE_DIRENT: {
434 struct jffs2_sum_dirent_flash *spd;
435 spd = sp;
436
David Woodhouse8b9e9fe2006-05-25 01:53:09 +0100437 dbg_summary("Dirent at 0x%08x-0x%08x\n",
David Woodhouse9167e0f2006-05-21 13:13:45 +0100438 jeb->offset + je32_to_cpu(spd->offset),
439 jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
440
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100441
442 fd = jffs2_alloc_full_dirent(spd->nsize+1);
David Woodhouse9641b782006-05-20 16:13:34 +0100443 if (!fd)
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100444 return -ENOMEM;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100445
446 memcpy(&fd->name, spd->name, spd->nsize);
447 fd->name[spd->nsize] = 0;
448
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100449 ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
450 if (!ic) {
451 jffs2_free_full_dirent(fd);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100452 return -ENOMEM;
453 }
454
David Woodhouse1046d882006-06-18 22:44:21 +0100455 fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED,
David Woodhouse2f785402006-05-24 02:04:45 +0100456 PAD(je32_to_cpu(spd->totlen)), ic);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100457
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100458 fd->next = NULL;
459 fd->version = je32_to_cpu(spd->version);
460 fd->ino = je32_to_cpu(spd->ino);
461 fd->nhash = full_name_hash(fd->name, spd->nsize);
462 fd->type = spd->type;
David Woodhousef1f96712006-05-20 19:45:26 +0100463
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100464 jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
465
466 *pseudo_random += je32_to_cpu(spd->version);
467
468 sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
469
470 break;
471 }
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900472#ifdef CONFIG_JFFS2_FS_XATTR
473 case JFFS2_NODETYPE_XATTR: {
474 struct jffs2_xattr_datum *xd;
475 struct jffs2_sum_xattr_flash *spx;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100476
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900477 spx = (struct jffs2_sum_xattr_flash *)sp;
David Woodhouse9167e0f2006-05-21 13:13:45 +0100478 dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n",
David Woodhouse49f11d42006-05-21 04:00:01 +0100479 jeb->offset + je32_to_cpu(spx->offset),
David Woodhouse9167e0f2006-05-21 13:13:45 +0100480 jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900481 je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
David Woodhouse2f785402006-05-24 02:04:45 +0100482
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900483 xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
484 je32_to_cpu(spx->version));
KaiGai Koheic9f700f2006-06-11 10:35:15 +0900485 if (IS_ERR(xd))
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900486 return PTR_ERR(xd);
KaiGai Koheic9f700f2006-06-11 10:35:15 +0900487 if (xd->version > je32_to_cpu(spx->version)) {
488 /* node is not the newest one */
489 struct jffs2_raw_node_ref *raw
490 = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
491 PAD(je32_to_cpu(spx->totlen)), NULL);
492 raw->next_in_ino = xd->node->next_in_ino;
493 xd->node->next_in_ino = raw;
494 } else {
495 xd->version = je32_to_cpu(spx->version);
496 sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
497 PAD(je32_to_cpu(spx->totlen)), (void *)xd);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900498 }
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900499 *pseudo_random += je32_to_cpu(spx->xid);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900500 sp += JFFS2_SUMMARY_XATTR_SIZE;
501
502 break;
503 }
504 case JFFS2_NODETYPE_XREF: {
505 struct jffs2_xattr_ref *ref;
506 struct jffs2_sum_xref_flash *spr;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900507
508 spr = (struct jffs2_sum_xref_flash *)sp;
David Woodhouse9167e0f2006-05-21 13:13:45 +0100509 dbg_summary("xref at %#08x-%#08x\n",
David Woodhouse49f11d42006-05-21 04:00:01 +0100510 jeb->offset + je32_to_cpu(spr->offset),
David Woodhouse9bfeb692006-05-26 21:19:05 +0100511 jeb->offset + je32_to_cpu(spr->offset) +
512 (uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
David Woodhouse9167e0f2006-05-21 13:13:45 +0100513
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900514 ref = jffs2_alloc_xattr_ref();
515 if (!ref) {
516 JFFS2_NOTICE("allocation of xattr_datum failed\n");
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900517 return -ENOMEM;
518 }
KaiGai Kohei8f2b6f42006-05-13 15:15:07 +0900519 ref->next = c->xref_temp;
520 c->xref_temp = ref;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900521
KaiGai Koheic9f700f2006-06-11 10:35:15 +0900522 sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
523 PAD(sizeof(struct jffs2_raw_xref)), (void *)ref);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900524
David Woodhouse2f785402006-05-24 02:04:45 +0100525 *pseudo_random += ref->node->flash_offset;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900526 sp += JFFS2_SUMMARY_XREF_SIZE;
527
528 break;
529 }
530#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100531 default : {
David Woodhouse7807ef72006-05-21 03:45:27 +0100532 uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
533 JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
534 if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
535 return -EIO;
536
537 /* For compatible node types, just fall back to the full scan */
538 c->wasted_size -= jeb->wasted_size;
539 c->free_size += c->sector_size - jeb->free_size;
540 c->used_size -= jeb->used_size;
541 c->dirty_size -= jeb->dirty_size;
542 jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
543 jeb->free_size = c->sector_size;
544
David Woodhousec38c1b62006-05-25 01:38:27 +0100545 jffs2_free_jeb_node_refs(c, jeb);
David Woodhouse7807ef72006-05-21 03:45:27 +0100546 return -ENOTRECOVERABLE;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100547 }
548 }
549 }
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100550 return 0;
551}
552
553/* Process the summary node - called from jffs2_scan_eraseblock() */
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100554int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
David Woodhouse9641b782006-05-20 16:13:34 +0100555 struct jffs2_raw_summary *summary, uint32_t sumsize,
556 uint32_t *pseudo_random)
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100557{
558 struct jffs2_unknown_node crcnode;
David Woodhouse9641b782006-05-20 16:13:34 +0100559 int ret, ofs;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100560 uint32_t crc;
561
David Woodhouse49f11d42006-05-21 04:00:01 +0100562 ofs = c->sector_size - sumsize;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100563
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100564 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
David Woodhouse49f11d42006-05-21 04:00:01 +0100565 jeb->offset, jeb->offset + ofs, sumsize);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100566
567 /* OK, now check for node validity and CRC */
568 crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
569 crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
570 crcnode.totlen = summary->totlen;
571 crc = crc32(0, &crcnode, sizeof(crcnode)-4);
572
573 if (je32_to_cpu(summary->hdr_crc) != crc) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100574 dbg_summary("Summary node header is corrupt (bad CRC or "
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100575 "no summary at all)\n");
576 goto crc_err;
577 }
578
579 if (je32_to_cpu(summary->totlen) != sumsize) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100580 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100581 goto crc_err;
582 }
583
Ferenc Havasi2bc97642005-09-26 12:37:25 +0100584 crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100585
586 if (je32_to_cpu(summary->node_crc) != crc) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100587 dbg_summary("Summary node is corrupt (bad CRC)\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100588 goto crc_err;
589 }
590
Ferenc Havasi2bc97642005-09-26 12:37:25 +0100591 crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100592
593 if (je32_to_cpu(summary->sum_crc) != crc) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100594 dbg_summary("Summary node data is corrupt (bad CRC)\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100595 goto crc_err;
596 }
597
598 if ( je32_to_cpu(summary->cln_mkr) ) {
599
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100600 dbg_summary("Summary : CLEANMARKER node \n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100601
David Woodhouse098a1982006-05-30 09:00:14 +0100602 ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
603 if (ret)
604 return ret;
605
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100606 if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100607 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100608 je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
David Woodhouse098a1982006-05-30 09:00:14 +0100609 if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
610 return ret;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100611 } else if (jeb->first_node) {
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100612 dbg_summary("CLEANMARKER node not first node in block "
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100613 "(0x%08x)\n", jeb->offset);
David Woodhouse098a1982006-05-30 09:00:14 +0100614 if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
615 return ret;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100616 } else {
David Woodhouse2f785402006-05-24 02:04:45 +0100617 jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL,
618 je32_to_cpu(summary->cln_mkr), NULL);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100619 }
620 }
621
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100622 ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
David Woodhouse7807ef72006-05-21 03:45:27 +0100623 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
624 scan of this eraseblock. So return zero */
625 if (ret == -ENOTRECOVERABLE)
626 return 0;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100627 if (ret)
David Woodhouse7807ef72006-05-21 03:45:27 +0100628 return ret; /* real error */
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100629
630 /* for PARANOIA_CHECK */
David Woodhouse046b8b92006-05-25 01:50:35 +0100631 ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
David Woodhouse2f785402006-05-24 02:04:45 +0100632 if (ret)
633 return ret;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100634
David Woodhousef61579c32006-05-25 01:42:40 +0100635 sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100636
David Woodhouse49f11d42006-05-21 04:00:01 +0100637 if (unlikely(jeb->free_size)) {
638 JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
639 jeb->free_size, jeb->offset);
640 jeb->wasted_size += jeb->free_size;
641 c->wasted_size += jeb->free_size;
642 c->free_size -= jeb->free_size;
643 jeb->free_size = 0;
644 }
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100645
646 return jffs2_scan_classify_jeb(c, jeb);
647
648crc_err:
649 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
650
651 return 0;
652}
653
654/* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
655
656static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
657 uint32_t infosize, uint32_t datasize, int padsize)
658{
Ferenc Havasi2bc97642005-09-26 12:37:25 +0100659 struct jffs2_raw_summary isum;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100660 union jffs2_sum_mem *temp;
661 struct jffs2_sum_marker *sm;
662 struct kvec vecs[2];
David Woodhouse2f785402006-05-24 02:04:45 +0100663 uint32_t sum_ofs;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100664 void *wpage;
665 int ret;
666 size_t retlen;
667
668 memset(c->summary->sum_buf, 0xff, datasize);
669 memset(&isum, 0, sizeof(isum));
670
671 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
672 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
673 isum.totlen = cpu_to_je32(infosize);
674 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
675 isum.padded = cpu_to_je32(c->summary->sum_padded);
676 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
677 isum.sum_num = cpu_to_je32(c->summary->sum_num);
678 wpage = c->summary->sum_buf;
679
680 while (c->summary->sum_num) {
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100681 temp = c->summary->sum_list_head;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100682
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100683 switch (je16_to_cpu(temp->u.nodetype)) {
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100684 case JFFS2_NODETYPE_INODE: {
685 struct jffs2_sum_inode_flash *sino_ptr = wpage;
686
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100687 sino_ptr->nodetype = temp->i.nodetype;
688 sino_ptr->inode = temp->i.inode;
689 sino_ptr->version = temp->i.version;
690 sino_ptr->offset = temp->i.offset;
691 sino_ptr->totlen = temp->i.totlen;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100692
693 wpage += JFFS2_SUMMARY_INODE_SIZE;
694
695 break;
696 }
697
698 case JFFS2_NODETYPE_DIRENT: {
699 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
700
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100701 sdrnt_ptr->nodetype = temp->d.nodetype;
702 sdrnt_ptr->totlen = temp->d.totlen;
703 sdrnt_ptr->offset = temp->d.offset;
704 sdrnt_ptr->pino = temp->d.pino;
705 sdrnt_ptr->version = temp->d.version;
706 sdrnt_ptr->ino = temp->d.ino;
707 sdrnt_ptr->nsize = temp->d.nsize;
708 sdrnt_ptr->type = temp->d.type;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100709
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100710 memcpy(sdrnt_ptr->name, temp->d.name,
711 temp->d.nsize);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100712
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100713 wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100714
715 break;
716 }
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900717#ifdef CONFIG_JFFS2_FS_XATTR
718 case JFFS2_NODETYPE_XATTR: {
719 struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100720
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900721 temp = c->summary->sum_list_head;
722 sxattr_ptr->nodetype = temp->x.nodetype;
723 sxattr_ptr->xid = temp->x.xid;
724 sxattr_ptr->version = temp->x.version;
725 sxattr_ptr->offset = temp->x.offset;
726 sxattr_ptr->totlen = temp->x.totlen;
727
728 wpage += JFFS2_SUMMARY_XATTR_SIZE;
729 break;
730 }
731 case JFFS2_NODETYPE_XREF: {
732 struct jffs2_sum_xref_flash *sxref_ptr = wpage;
733
734 temp = c->summary->sum_list_head;
735 sxref_ptr->nodetype = temp->r.nodetype;
736 sxref_ptr->offset = temp->r.offset;
737
738 wpage += JFFS2_SUMMARY_XREF_SIZE;
739 break;
740 }
741#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100742 default : {
David Woodhouse61715862006-05-21 00:02:06 +0100743 if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
744 == JFFS2_FEATURE_RWCOMPAT_COPY) {
745 dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
746 je16_to_cpu(temp->u.nodetype));
747 jffs2_sum_disable_collecting(c->summary);
748 } else {
749 BUG(); /* unknown node in summary information */
750 }
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100751 }
752 }
753
Jesper Juhl20ffdcb2006-05-12 11:55:51 +0100754 c->summary->sum_list_head = temp->u.next;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100755 kfree(temp);
756
757 c->summary->sum_num--;
758 }
759
760 jffs2_sum_reset_collected(c->summary);
761
762 wpage += padsize;
763
764 sm = wpage;
765 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
766 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
767
768 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
769 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
770
771 vecs[0].iov_base = &isum;
772 vecs[0].iov_len = sizeof(isum);
773 vecs[1].iov_base = c->summary->sum_buf;
774 vecs[1].iov_len = datasize;
775
David Woodhouse2f785402006-05-24 02:04:45 +0100776 sum_ofs = jeb->offset + c->sector_size - jeb->free_size;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100777
David Woodhouse2f785402006-05-24 02:04:45 +0100778 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
779 sum_ofs);
780
781 ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100782
783 if (ret || (retlen != infosize)) {
David Woodhouse010b06d2006-05-21 13:15:59 +0100784
David Woodhousec41ff6e2006-05-16 17:05:33 +0100785 JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
David Woodhouse2f785402006-05-24 02:04:45 +0100786 infosize, sum_ofs, ret, retlen);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100787
David Woodhouse9bfeb692006-05-26 21:19:05 +0100788 if (retlen) {
789 /* Waste remaining space */
790 spin_lock(&c->erase_completion_lock);
791 jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
792 spin_unlock(&c->erase_completion_lock);
793 }
David Woodhouse010b06d2006-05-21 13:15:59 +0100794
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100795 c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100796
David Woodhouse2f785402006-05-24 02:04:45 +0100797 return 0;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100798 }
799
David Woodhouse010b06d2006-05-21 13:15:59 +0100800 spin_lock(&c->erase_completion_lock);
David Woodhouse2f785402006-05-24 02:04:45 +0100801 jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
802 spin_unlock(&c->erase_completion_lock);
David Woodhouse010b06d2006-05-21 13:15:59 +0100803
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100804 return 0;
805}
806
807/* Write out summary information - called from jffs2_do_reserve_space */
808
809int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
810{
David Woodhouse2f785402006-05-24 02:04:45 +0100811 int datasize, infosize, padsize;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100812 struct jffs2_eraseblock *jeb;
David Woodhouse2f785402006-05-24 02:04:45 +0100813 int ret;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100814
Artem B. Bityutskiy733802d2005-09-22 12:25:00 +0100815 dbg_summary("called\n");
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100816
David Woodhouse2f785402006-05-24 02:04:45 +0100817 spin_unlock(&c->erase_completion_lock);
David Woodhouse2f785402006-05-24 02:04:45 +0100818
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100819 jeb = c->nextblock;
David Woodhouse046b8b92006-05-25 01:50:35 +0100820 jffs2_prealloc_raw_node_refs(c, jeb, 1);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100821
822 if (!c->summary->sum_num || !c->summary->sum_list_head) {
823 JFFS2_WARNING("Empty summary info!!!\n");
824 BUG();
825 }
826
827 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
Ferenc Havasi2bc97642005-09-26 12:37:25 +0100828 infosize = sizeof(struct jffs2_raw_summary) + datasize;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100829 padsize = jeb->free_size - infosize;
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000830 infosize += padsize;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100831 datasize += padsize;
832
833 /* Is there enough space for summary? */
834 if (padsize < 0) {
835 /* don't try to write out summary for this jeb */
836 jffs2_sum_disable_collecting(c->summary);
837
838 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
David Woodhouse9bfeb692006-05-26 21:19:05 +0100839 spin_lock(&c->erase_completion_lock);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100840 return 0;
841 }
842
843 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
David Woodhouse010b06d2006-05-21 13:15:59 +0100844 spin_lock(&c->erase_completion_lock);
David Woodhouse2f785402006-05-24 02:04:45 +0100845 return ret;
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100846}