1e631ddbaSFerenc Havasi /*
2e631ddbaSFerenc Havasi * JFFS2 -- Journalling Flash File System, Version 2.
3e631ddbaSFerenc Havasi *
4c00c310eSDavid Woodhouse * Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
5e631ddbaSFerenc Havasi * Zoltan Sogor <weth@inf.u-szeged.hu>,
6e631ddbaSFerenc Havasi * Patrik Kluba <pajko@halom.u-szeged.hu>,
7e631ddbaSFerenc Havasi * University of Szeged, Hungary
8332a6b99SKaiGai Kohei * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com>
9e631ddbaSFerenc Havasi *
10e631ddbaSFerenc Havasi * For licensing information, see the file 'LICENCE' in this directory.
11e631ddbaSFerenc Havasi *
12e631ddbaSFerenc Havasi */
13e631ddbaSFerenc Havasi
145a528957SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
155a528957SJoe Perches
16e631ddbaSFerenc Havasi #include <linux/kernel.h>
17e631ddbaSFerenc Havasi #include <linux/slab.h>
18e631ddbaSFerenc Havasi #include <linux/mtd/mtd.h>
19e631ddbaSFerenc Havasi #include <linux/pagemap.h>
20e631ddbaSFerenc Havasi #include <linux/crc32.h>
21e631ddbaSFerenc Havasi #include <linux/compiler.h>
22e631ddbaSFerenc Havasi #include <linux/vmalloc.h>
23e631ddbaSFerenc Havasi #include "nodelist.h"
24e631ddbaSFerenc Havasi #include "debug.h"
25e631ddbaSFerenc Havasi
jffs2_sum_init(struct jffs2_sb_info * c)26e631ddbaSFerenc Havasi int jffs2_sum_init(struct jffs2_sb_info *c)
27e631ddbaSFerenc Havasi {
280fed784bSRoel Kluin uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE);
29b7600dbaSDavid Woodhouse
303d375d9eSYan Burman c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
31e631ddbaSFerenc Havasi
32e631ddbaSFerenc Havasi if (!c->summary) {
33e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate memory for summary information!\n");
34e631ddbaSFerenc Havasi return -ENOMEM;
35e631ddbaSFerenc Havasi }
36e631ddbaSFerenc Havasi
37b7600dbaSDavid Woodhouse c->summary->sum_buf = kmalloc(sum_size, GFP_KERNEL);
38e631ddbaSFerenc Havasi
39e631ddbaSFerenc Havasi if (!c->summary->sum_buf) {
40e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
41733802d9SArtem B. Bityutskiy kfree(c->summary);
42e631ddbaSFerenc Havasi return -ENOMEM;
43e631ddbaSFerenc Havasi }
44e631ddbaSFerenc Havasi
45d6e05edcSAndreas Mohr dbg_summary("returned successfully\n");
46e631ddbaSFerenc Havasi
47e631ddbaSFerenc Havasi return 0;
48e631ddbaSFerenc Havasi }
49e631ddbaSFerenc Havasi
jffs2_sum_exit(struct jffs2_sb_info * c)50e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c)
51e631ddbaSFerenc Havasi {
52733802d9SArtem B. Bityutskiy dbg_summary("called\n");
53e631ddbaSFerenc Havasi
54e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary);
55e631ddbaSFerenc Havasi
56b7600dbaSDavid Woodhouse kfree(c->summary->sum_buf);
57e631ddbaSFerenc Havasi c->summary->sum_buf = NULL;
58e631ddbaSFerenc Havasi
59e631ddbaSFerenc Havasi kfree(c->summary);
60e631ddbaSFerenc Havasi c->summary = NULL;
61e631ddbaSFerenc Havasi }
62e631ddbaSFerenc Havasi
jffs2_sum_add_mem(struct jffs2_summary * s,union jffs2_sum_mem * item)63e631ddbaSFerenc Havasi static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
64e631ddbaSFerenc Havasi {
65e631ddbaSFerenc Havasi if (!s->sum_list_head)
66e631ddbaSFerenc Havasi s->sum_list_head = (union jffs2_sum_mem *) item;
67e631ddbaSFerenc Havasi if (s->sum_list_tail)
68e631ddbaSFerenc Havasi s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
69e631ddbaSFerenc Havasi s->sum_list_tail = (union jffs2_sum_mem *) item;
70e631ddbaSFerenc Havasi
71e631ddbaSFerenc Havasi switch (je16_to_cpu(item->u.nodetype)) {
72e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE:
73e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
74e631ddbaSFerenc Havasi s->sum_num++;
75733802d9SArtem B. Bityutskiy dbg_summary("inode (%u) added to summary\n",
76e631ddbaSFerenc Havasi je32_to_cpu(item->i.inode));
77e631ddbaSFerenc Havasi break;
78e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT:
79e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
80e631ddbaSFerenc Havasi s->sum_num++;
81733802d9SArtem B. Bityutskiy dbg_summary("dirent (%u) added to summary\n",
82e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino));
83e631ddbaSFerenc Havasi break;
84aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
85aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR:
86aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
87aa98d7cfSKaiGai Kohei s->sum_num++;
88aa98d7cfSKaiGai Kohei dbg_summary("xattr (xid=%u, version=%u) added to summary\n",
89aa98d7cfSKaiGai Kohei je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version));
90aa98d7cfSKaiGai Kohei break;
91aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF:
92aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XREF_SIZE;
93aa98d7cfSKaiGai Kohei s->sum_num++;
94aa98d7cfSKaiGai Kohei dbg_summary("xref added to summary\n");
95aa98d7cfSKaiGai Kohei break;
96aa98d7cfSKaiGai Kohei #endif
97e631ddbaSFerenc Havasi default:
98e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n",
99e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype));
100e631ddbaSFerenc Havasi return 1;
101e631ddbaSFerenc Havasi }
102e631ddbaSFerenc Havasi return 0;
103e631ddbaSFerenc Havasi }
104e631ddbaSFerenc Havasi
105e631ddbaSFerenc Havasi
106e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */
107e631ddbaSFerenc Havasi
jffs2_sum_add_padding_mem(struct jffs2_summary * s,uint32_t size)108e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size)
109e631ddbaSFerenc Havasi {
110733802d9SArtem B. Bityutskiy dbg_summary("called with %u\n", size);
111e631ddbaSFerenc Havasi s->sum_padded += size;
112e631ddbaSFerenc Havasi return 0;
113e631ddbaSFerenc Havasi }
114e631ddbaSFerenc Havasi
jffs2_sum_add_inode_mem(struct jffs2_summary * s,struct jffs2_raw_inode * ri,uint32_t ofs)115e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri,
116e631ddbaSFerenc Havasi uint32_t ofs)
117e631ddbaSFerenc Havasi {
118e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
119e631ddbaSFerenc Havasi
120e631ddbaSFerenc Havasi if (!temp)
121e631ddbaSFerenc Havasi return -ENOMEM;
122e631ddbaSFerenc Havasi
123e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype;
124e631ddbaSFerenc Havasi temp->inode = ri->ino;
125e631ddbaSFerenc Havasi temp->version = ri->version;
12625985edcSLucas De Marchi temp->offset = cpu_to_je32(ofs); /* relative offset from the beginning of the jeb */
127e631ddbaSFerenc Havasi temp->totlen = ri->totlen;
128e631ddbaSFerenc Havasi temp->next = NULL;
129e631ddbaSFerenc Havasi
130e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
131e631ddbaSFerenc Havasi }
132e631ddbaSFerenc Havasi
jffs2_sum_add_dirent_mem(struct jffs2_summary * s,struct jffs2_raw_dirent * rd,uint32_t ofs)133e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd,
134e631ddbaSFerenc Havasi uint32_t ofs)
135e631ddbaSFerenc Havasi {
136e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp =
137e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL);
138e631ddbaSFerenc Havasi
139e631ddbaSFerenc Havasi if (!temp)
140e631ddbaSFerenc Havasi return -ENOMEM;
141e631ddbaSFerenc Havasi
142e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype;
143e631ddbaSFerenc Havasi temp->totlen = rd->totlen;
14425985edcSLucas De Marchi temp->offset = cpu_to_je32(ofs); /* relative from the beginning of the jeb */
145e631ddbaSFerenc Havasi temp->pino = rd->pino;
146e631ddbaSFerenc Havasi temp->version = rd->version;
147e631ddbaSFerenc Havasi temp->ino = rd->ino;
148e631ddbaSFerenc Havasi temp->nsize = rd->nsize;
149e631ddbaSFerenc Havasi temp->type = rd->type;
150e631ddbaSFerenc Havasi temp->next = NULL;
151e631ddbaSFerenc Havasi
152e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize);
153e631ddbaSFerenc Havasi
154e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
155e631ddbaSFerenc Havasi }
156e631ddbaSFerenc Havasi
157aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
jffs2_sum_add_xattr_mem(struct jffs2_summary * s,struct jffs2_raw_xattr * rx,uint32_t ofs)158aa98d7cfSKaiGai Kohei int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs)
159aa98d7cfSKaiGai Kohei {
160aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp;
161aa98d7cfSKaiGai Kohei
162aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
163aa98d7cfSKaiGai Kohei if (!temp)
164aa98d7cfSKaiGai Kohei return -ENOMEM;
165aa98d7cfSKaiGai Kohei
166aa98d7cfSKaiGai Kohei temp->nodetype = rx->nodetype;
167aa98d7cfSKaiGai Kohei temp->xid = rx->xid;
168aa98d7cfSKaiGai Kohei temp->version = rx->version;
169aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs);
170aa98d7cfSKaiGai Kohei temp->totlen = rx->totlen;
171aa98d7cfSKaiGai Kohei temp->next = NULL;
172aa98d7cfSKaiGai Kohei
173aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
174aa98d7cfSKaiGai Kohei }
175aa98d7cfSKaiGai Kohei
jffs2_sum_add_xref_mem(struct jffs2_summary * s,struct jffs2_raw_xref * rr,uint32_t ofs)176aa98d7cfSKaiGai Kohei int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs)
177aa98d7cfSKaiGai Kohei {
178aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp;
179aa98d7cfSKaiGai Kohei
180aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
181aa98d7cfSKaiGai Kohei if (!temp)
182aa98d7cfSKaiGai Kohei return -ENOMEM;
183aa98d7cfSKaiGai Kohei
184aa98d7cfSKaiGai Kohei temp->nodetype = rr->nodetype;
185aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs);
186aa98d7cfSKaiGai Kohei temp->next = NULL;
187aa98d7cfSKaiGai Kohei
188aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp);
189aa98d7cfSKaiGai Kohei }
190aa98d7cfSKaiGai Kohei #endif
191e631ddbaSFerenc Havasi /* Cleanup every collected summary information */
192e631ddbaSFerenc Havasi
jffs2_sum_clean_collected(struct jffs2_summary * s)193e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s)
194e631ddbaSFerenc Havasi {
195e631ddbaSFerenc Havasi union jffs2_sum_mem *temp;
196e631ddbaSFerenc Havasi
197e631ddbaSFerenc Havasi if (!s->sum_list_head) {
198733802d9SArtem B. Bityutskiy dbg_summary("already empty\n");
199e631ddbaSFerenc Havasi }
200e631ddbaSFerenc Havasi while (s->sum_list_head) {
201e631ddbaSFerenc Havasi temp = s->sum_list_head;
202e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next;
203e631ddbaSFerenc Havasi kfree(temp);
204e631ddbaSFerenc Havasi }
205e631ddbaSFerenc Havasi s->sum_list_tail = NULL;
206e631ddbaSFerenc Havasi s->sum_padded = 0;
207e631ddbaSFerenc Havasi s->sum_num = 0;
208e631ddbaSFerenc Havasi }
209e631ddbaSFerenc Havasi
jffs2_sum_reset_collected(struct jffs2_summary * s)210e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s)
211e631ddbaSFerenc Havasi {
212733802d9SArtem B. Bityutskiy dbg_summary("called\n");
213e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s);
214e631ddbaSFerenc Havasi s->sum_size = 0;
215e631ddbaSFerenc Havasi }
216e631ddbaSFerenc Havasi
jffs2_sum_disable_collecting(struct jffs2_summary * s)217e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s)
218e631ddbaSFerenc Havasi {
219733802d9SArtem B. Bityutskiy dbg_summary("called\n");
220e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s);
221e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
222e631ddbaSFerenc Havasi }
223e631ddbaSFerenc Havasi
jffs2_sum_is_disabled(struct jffs2_summary * s)224e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s)
225e631ddbaSFerenc Havasi {
226e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE);
227e631ddbaSFerenc Havasi }
228e631ddbaSFerenc Havasi
229e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */
230e631ddbaSFerenc Havasi
jffs2_sum_move_collected(struct jffs2_sb_info * c,struct jffs2_summary * s)231e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
232e631ddbaSFerenc Havasi {
233733802d9SArtem B. Bityutskiy dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
234e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num,
235e631ddbaSFerenc Havasi s->sum_size, s->sum_num);
236e631ddbaSFerenc Havasi
237e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size;
238e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num;
239e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded;
240e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head;
241e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail;
242e631ddbaSFerenc Havasi
243e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL;
244e631ddbaSFerenc Havasi }
245e631ddbaSFerenc Havasi
246e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */
247e631ddbaSFerenc Havasi
jffs2_sum_add_kvec(struct jffs2_sb_info * c,const struct kvec * invecs,unsigned long count,uint32_t ofs)248e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
249e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs)
250e631ddbaSFerenc Havasi {
251e631ddbaSFerenc Havasi union jffs2_node_union *node;
252e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb;
253e631ddbaSFerenc Havasi
25427bea327SZoltan Sogor if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) {
25527bea327SZoltan Sogor dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n");
25627bea327SZoltan Sogor return 0;
25727bea327SZoltan Sogor }
25827bea327SZoltan Sogor
259e631ddbaSFerenc Havasi node = invecs[0].iov_base;
260e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size];
261e631ddbaSFerenc Havasi ofs -= jeb->offset;
262e631ddbaSFerenc Havasi
263e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) {
264e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: {
265e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp =
266e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL);
267e631ddbaSFerenc Havasi
268e631ddbaSFerenc Havasi if (!temp)
269e631ddbaSFerenc Havasi goto no_mem;
270e631ddbaSFerenc Havasi
271e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype;
272e631ddbaSFerenc Havasi temp->inode = node->i.ino;
273e631ddbaSFerenc Havasi temp->version = node->i.version;
274e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs);
275e631ddbaSFerenc Havasi temp->totlen = node->i.totlen;
276e631ddbaSFerenc Havasi temp->next = NULL;
277e631ddbaSFerenc Havasi
278e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
279e631ddbaSFerenc Havasi }
280e631ddbaSFerenc Havasi
281e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: {
282e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp =
283e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL);
284e631ddbaSFerenc Havasi
285e631ddbaSFerenc Havasi if (!temp)
286e631ddbaSFerenc Havasi goto no_mem;
287e631ddbaSFerenc Havasi
288e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype;
289e631ddbaSFerenc Havasi temp->totlen = node->d.totlen;
290e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs);
291e631ddbaSFerenc Havasi temp->pino = node->d.pino;
292e631ddbaSFerenc Havasi temp->version = node->d.version;
293e631ddbaSFerenc Havasi temp->ino = node->d.ino;
294e631ddbaSFerenc Havasi temp->nsize = node->d.nsize;
295e631ddbaSFerenc Havasi temp->type = node->d.type;
296e631ddbaSFerenc Havasi temp->next = NULL;
297e631ddbaSFerenc Havasi
298e631ddbaSFerenc Havasi switch (count) {
299e631ddbaSFerenc Havasi case 1:
300e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize);
301e631ddbaSFerenc Havasi break;
302e631ddbaSFerenc Havasi
303e631ddbaSFerenc Havasi case 2:
304e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize);
305e631ddbaSFerenc Havasi break;
306e631ddbaSFerenc Havasi
307e631ddbaSFerenc Havasi default:
308e631ddbaSFerenc Havasi BUG(); /* impossible count value */
309e631ddbaSFerenc Havasi break;
310e631ddbaSFerenc Havasi }
311e631ddbaSFerenc Havasi
312e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
313e631ddbaSFerenc Havasi }
314aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
315aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: {
316aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp;
317aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
318aa98d7cfSKaiGai Kohei if (!temp)
319aa98d7cfSKaiGai Kohei goto no_mem;
320e631ddbaSFerenc Havasi
321aa98d7cfSKaiGai Kohei temp->nodetype = node->x.nodetype;
322aa98d7cfSKaiGai Kohei temp->xid = node->x.xid;
323aa98d7cfSKaiGai Kohei temp->version = node->x.version;
324aa98d7cfSKaiGai Kohei temp->totlen = node->x.totlen;
325aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs);
326aa98d7cfSKaiGai Kohei temp->next = NULL;
327aa98d7cfSKaiGai Kohei
328aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
329aa98d7cfSKaiGai Kohei }
330aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: {
331aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp;
332aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
333aa98d7cfSKaiGai Kohei if (!temp)
334aa98d7cfSKaiGai Kohei goto no_mem;
335aa98d7cfSKaiGai Kohei temp->nodetype = node->r.nodetype;
336aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs);
337aa98d7cfSKaiGai Kohei temp->next = NULL;
338aa98d7cfSKaiGai Kohei
339aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
340aa98d7cfSKaiGai Kohei }
341aa98d7cfSKaiGai Kohei #endif
342e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING:
343733802d9SArtem B. Bityutskiy dbg_summary("node PADDING\n");
344e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen);
345e631ddbaSFerenc Havasi break;
346e631ddbaSFerenc Havasi
347e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER:
348733802d9SArtem B. Bityutskiy dbg_summary("node CLEANMARKER\n");
349e631ddbaSFerenc Havasi break;
350e631ddbaSFerenc Havasi
351e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY:
352733802d9SArtem B. Bityutskiy dbg_summary("node SUMMARY\n");
353e631ddbaSFerenc Havasi break;
354e631ddbaSFerenc Havasi
355e631ddbaSFerenc Havasi default:
356e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement
357e631ddbaSFerenc Havasi summary support for it or disable summary.
358e631ddbaSFerenc Havasi */
359e631ddbaSFerenc Havasi BUG();
360e631ddbaSFerenc Havasi break;
361e631ddbaSFerenc Havasi }
362e631ddbaSFerenc Havasi
363e631ddbaSFerenc Havasi return 0;
364e631ddbaSFerenc Havasi
365e631ddbaSFerenc Havasi no_mem:
366e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
367e631ddbaSFerenc Havasi return -ENOMEM;
368e631ddbaSFerenc Havasi }
369e631ddbaSFerenc Havasi
sum_link_node_ref(struct jffs2_sb_info * c,struct jffs2_eraseblock * jeb,uint32_t ofs,uint32_t len,struct jffs2_inode_cache * ic)3702f785402SDavid Woodhouse static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
3712f785402SDavid Woodhouse struct jffs2_eraseblock *jeb,
3722f785402SDavid Woodhouse uint32_t ofs, uint32_t len,
3732f785402SDavid Woodhouse struct jffs2_inode_cache *ic)
37449f11d40SDavid Woodhouse {
37549f11d40SDavid Woodhouse /* If there was a gap, mark it dirty */
3762f785402SDavid Woodhouse if ((ofs & ~3) > c->sector_size - jeb->free_size) {
3772f785402SDavid Woodhouse /* Ew. Summary doesn't actually tell us explicitly about dirty space */
3782f785402SDavid Woodhouse jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size));
37949f11d40SDavid Woodhouse }
38049f11d40SDavid Woodhouse
3812f785402SDavid Woodhouse return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic);
38249f11d40SDavid Woodhouse }
383e631ddbaSFerenc Havasi
384e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
385e631ddbaSFerenc Havasi
jffs2_sum_process_sum_data(struct jffs2_sb_info * c,struct jffs2_eraseblock * jeb,struct jffs2_raw_summary * summary,uint32_t * pseudo_random)386e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
3872bc9764cSFerenc Havasi struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
388e631ddbaSFerenc Havasi {
389e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic;
390e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd;
391e631ddbaSFerenc Havasi void *sp;
392e631ddbaSFerenc Havasi int i, ino;
39368270995SDavid Woodhouse int err;
394e631ddbaSFerenc Havasi
395e631ddbaSFerenc Havasi sp = summary->sum;
396e631ddbaSFerenc Havasi
397e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
398733802d9SArtem B. Bityutskiy dbg_summary("processing summary index %d\n", i);
399e631ddbaSFerenc Havasi
400a2166b93SArtem Bityutskiy cond_resched();
401a2166b93SArtem Bityutskiy
4022f785402SDavid Woodhouse /* Make sure there's a spare ref for dirty space */
403046b8b98SDavid Woodhouse err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
4042f785402SDavid Woodhouse if (err)
4052f785402SDavid Woodhouse return err;
4062f785402SDavid Woodhouse
407e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
408e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: {
409e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi;
410e631ddbaSFerenc Havasi spi = sp;
411e631ddbaSFerenc Havasi
412e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode);
413e631ddbaSFerenc Havasi
4149167e0f8SDavid Woodhouse dbg_summary("Inode at 0x%08x-0x%08x\n",
4159167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset),
4168b9e9fe8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
417e631ddbaSFerenc Havasi
418e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino);
419e631ddbaSFerenc Havasi if (!ic) {
420e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n");
421e631ddbaSFerenc Havasi return -ENOMEM;
422e631ddbaSFerenc Havasi }
423e631ddbaSFerenc Havasi
4242f785402SDavid Woodhouse sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
4252f785402SDavid Woodhouse PAD(je32_to_cpu(spi->totlen)), ic);
426f1f9671bSDavid Woodhouse
427f1f9671bSDavid Woodhouse *pseudo_random += je32_to_cpu(spi->version);
428e631ddbaSFerenc Havasi
429e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE;
430e631ddbaSFerenc Havasi
431e631ddbaSFerenc Havasi break;
432e631ddbaSFerenc Havasi }
433e631ddbaSFerenc Havasi
434e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: {
435e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd;
436b534e70cSDavid Woodhouse int checkedlen;
437e631ddbaSFerenc Havasi spd = sp;
438e631ddbaSFerenc Havasi
4398b9e9fe8SDavid Woodhouse dbg_summary("Dirent at 0x%08x-0x%08x\n",
4409167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset),
4419167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
4429167e0f8SDavid Woodhouse
443e631ddbaSFerenc Havasi
444b534e70cSDavid Woodhouse /* This should never happen, but https://dev.laptop.org/ticket/4184 */
445b534e70cSDavid Woodhouse checkedlen = strnlen(spd->name, spd->nsize);
446b534e70cSDavid Woodhouse if (!checkedlen) {
447da320f05SJoe Perches pr_err("Dirent at %08x has zero at start of name. Aborting mount.\n",
448da320f05SJoe Perches jeb->offset +
449da320f05SJoe Perches je32_to_cpu(spd->offset));
450b534e70cSDavid Woodhouse return -EIO;
451b534e70cSDavid Woodhouse }
452b534e70cSDavid Woodhouse if (checkedlen < spd->nsize) {
453da320f05SJoe Perches pr_err("Dirent at %08x has zeroes in name. Truncating to %d chars\n",
454da320f05SJoe Perches jeb->offset +
455da320f05SJoe Perches je32_to_cpu(spd->offset),
456da320f05SJoe Perches checkedlen);
457b534e70cSDavid Woodhouse }
458b534e70cSDavid Woodhouse
459b534e70cSDavid Woodhouse
460b534e70cSDavid Woodhouse fd = jffs2_alloc_full_dirent(checkedlen+1);
4619641b784SDavid Woodhouse if (!fd)
462e631ddbaSFerenc Havasi return -ENOMEM;
463e631ddbaSFerenc Havasi
464b534e70cSDavid Woodhouse memcpy(&fd->name, spd->name, checkedlen);
465b534e70cSDavid Woodhouse fd->name[checkedlen] = 0;
466e631ddbaSFerenc Havasi
467e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
468e631ddbaSFerenc Havasi if (!ic) {
469e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd);
470e631ddbaSFerenc Havasi return -ENOMEM;
471e631ddbaSFerenc Havasi }
472e631ddbaSFerenc Havasi
4731046d880SDavid Woodhouse fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED,
4742f785402SDavid Woodhouse PAD(je32_to_cpu(spd->totlen)), ic);
475e631ddbaSFerenc Havasi
476e631ddbaSFerenc Havasi fd->next = NULL;
477e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version);
478e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino);
4798387ff25SLinus Torvalds fd->nhash = full_name_hash(NULL, fd->name, checkedlen);
480e631ddbaSFerenc Havasi fd->type = spd->type;
481f1f9671bSDavid Woodhouse
482e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
483e631ddbaSFerenc Havasi
484e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version);
485e631ddbaSFerenc Havasi
486e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
487e631ddbaSFerenc Havasi
488e631ddbaSFerenc Havasi break;
489e631ddbaSFerenc Havasi }
490aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
491aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: {
492aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd;
493aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *spx;
494e631ddbaSFerenc Havasi
495aa98d7cfSKaiGai Kohei spx = (struct jffs2_sum_xattr_flash *)sp;
4969167e0f8SDavid Woodhouse dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n",
49749f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset),
4989167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
499aa98d7cfSKaiGai Kohei je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
5002f785402SDavid Woodhouse
501aa98d7cfSKaiGai Kohei xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
502aa98d7cfSKaiGai Kohei je32_to_cpu(spx->version));
503c9f700f8SKaiGai Kohei if (IS_ERR(xd))
504aa98d7cfSKaiGai Kohei return PTR_ERR(xd);
505c9f700f8SKaiGai Kohei if (xd->version > je32_to_cpu(spx->version)) {
506c9f700f8SKaiGai Kohei /* node is not the newest one */
507c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw
508c9f700f8SKaiGai Kohei = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
5092f785402SDavid Woodhouse PAD(je32_to_cpu(spx->totlen)), NULL);
510c9f700f8SKaiGai Kohei raw->next_in_ino = xd->node->next_in_ino;
511c9f700f8SKaiGai Kohei xd->node->next_in_ino = raw;
512c9f700f8SKaiGai Kohei } else {
513c9f700f8SKaiGai Kohei xd->version = je32_to_cpu(spx->version);
514c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
515c9f700f8SKaiGai Kohei PAD(je32_to_cpu(spx->totlen)), (void *)xd);
516c9f700f8SKaiGai Kohei }
517aa98d7cfSKaiGai Kohei *pseudo_random += je32_to_cpu(spx->xid);
518aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XATTR_SIZE;
519aa98d7cfSKaiGai Kohei
520aa98d7cfSKaiGai Kohei break;
521aa98d7cfSKaiGai Kohei }
522aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: {
523aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref;
524aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *spr;
525aa98d7cfSKaiGai Kohei
526aa98d7cfSKaiGai Kohei spr = (struct jffs2_sum_xref_flash *)sp;
5279167e0f8SDavid Woodhouse dbg_summary("xref at %#08x-%#08x\n",
52849f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset),
5299bfeb691SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset) +
5309bfeb691SDavid Woodhouse (uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
5319167e0f8SDavid Woodhouse
532aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref();
533aa98d7cfSKaiGai Kohei if (!ref) {
534aa98d7cfSKaiGai Kohei JFFS2_NOTICE("allocation of xattr_datum failed\n");
535aa98d7cfSKaiGai Kohei return -ENOMEM;
536aa98d7cfSKaiGai Kohei }
5378f2b6f49SKaiGai Kohei ref->next = c->xref_temp;
5388f2b6f49SKaiGai Kohei c->xref_temp = ref;
539aa98d7cfSKaiGai Kohei
540c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
541c9f700f8SKaiGai Kohei PAD(sizeof(struct jffs2_raw_xref)), (void *)ref);
542aa98d7cfSKaiGai Kohei
5432f785402SDavid Woodhouse *pseudo_random += ref->node->flash_offset;
544aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XREF_SIZE;
545aa98d7cfSKaiGai Kohei
546aa98d7cfSKaiGai Kohei break;
547aa98d7cfSKaiGai Kohei }
548aa98d7cfSKaiGai Kohei #endif
549e631ddbaSFerenc Havasi default : {
5507807ef7bSDavid Woodhouse uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
5517807ef7bSDavid Woodhouse JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
5527807ef7bSDavid Woodhouse if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
553e631ddbaSFerenc Havasi return -EIO;
5547807ef7bSDavid Woodhouse
5557807ef7bSDavid Woodhouse /* For compatible node types, just fall back to the full scan */
5567807ef7bSDavid Woodhouse c->wasted_size -= jeb->wasted_size;
5577807ef7bSDavid Woodhouse c->free_size += c->sector_size - jeb->free_size;
5587807ef7bSDavid Woodhouse c->used_size -= jeb->used_size;
5597807ef7bSDavid Woodhouse c->dirty_size -= jeb->dirty_size;
5607807ef7bSDavid Woodhouse jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
5617807ef7bSDavid Woodhouse jeb->free_size = c->sector_size;
5627807ef7bSDavid Woodhouse
563c38c1b61SDavid Woodhouse jffs2_free_jeb_node_refs(c, jeb);
5647807ef7bSDavid Woodhouse return -ENOTRECOVERABLE;
565e631ddbaSFerenc Havasi }
566e631ddbaSFerenc Havasi }
567e631ddbaSFerenc Havasi }
568e631ddbaSFerenc Havasi return 0;
569e631ddbaSFerenc Havasi }
570e631ddbaSFerenc Havasi
571e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */
jffs2_sum_scan_sumnode(struct jffs2_sb_info * c,struct jffs2_eraseblock * jeb,struct jffs2_raw_summary * summary,uint32_t sumsize,uint32_t * pseudo_random)572e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
5739641b784SDavid Woodhouse struct jffs2_raw_summary *summary, uint32_t sumsize,
5749641b784SDavid Woodhouse uint32_t *pseudo_random)
575e631ddbaSFerenc Havasi {
576e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode;
5779641b784SDavid Woodhouse int ret, ofs;
578e631ddbaSFerenc Havasi uint32_t crc;
579e631ddbaSFerenc Havasi
58049f11d40SDavid Woodhouse ofs = c->sector_size - sumsize;
581e631ddbaSFerenc Havasi
582733802d9SArtem B. Bityutskiy dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
58349f11d40SDavid Woodhouse jeb->offset, jeb->offset + ofs, sumsize);
584e631ddbaSFerenc Havasi
585e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */
586e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
587e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
588e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen;
589e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4);
590e631ddbaSFerenc Havasi
591e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) {
592733802d9SArtem B. Bityutskiy dbg_summary("Summary node header is corrupt (bad CRC or "
593e631ddbaSFerenc Havasi "no summary at all)\n");
594e631ddbaSFerenc Havasi goto crc_err;
595e631ddbaSFerenc Havasi }
596e631ddbaSFerenc Havasi
597e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) {
598733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
599e631ddbaSFerenc Havasi goto crc_err;
600e631ddbaSFerenc Havasi }
601e631ddbaSFerenc Havasi
6022bc9764cSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
603e631ddbaSFerenc Havasi
604e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) {
605733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (bad CRC)\n");
606e631ddbaSFerenc Havasi goto crc_err;
607e631ddbaSFerenc Havasi }
608e631ddbaSFerenc Havasi
6092bc9764cSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
610e631ddbaSFerenc Havasi
611e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) {
612733802d9SArtem B. Bityutskiy dbg_summary("Summary node data is corrupt (bad CRC)\n");
613e631ddbaSFerenc Havasi goto crc_err;
614e631ddbaSFerenc Havasi }
615e631ddbaSFerenc Havasi
616e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) {
617e631ddbaSFerenc Havasi
618733802d9SArtem B. Bityutskiy dbg_summary("Summary : CLEANMARKER node \n");
619e631ddbaSFerenc Havasi
620098a1981SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
621098a1981SDavid Woodhouse if (ret)
622098a1981SDavid Woodhouse return ret;
623098a1981SDavid Woodhouse
624e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
625733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
626e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
627098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
628098a1981SDavid Woodhouse return ret;
629e631ddbaSFerenc Havasi } else if (jeb->first_node) {
630733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node not first node in block "
631e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset);
632098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
633098a1981SDavid Woodhouse return ret;
634e631ddbaSFerenc Havasi } else {
6352f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL,
6362f785402SDavid Woodhouse je32_to_cpu(summary->cln_mkr), NULL);
637e631ddbaSFerenc Havasi }
638e631ddbaSFerenc Havasi }
639e631ddbaSFerenc Havasi
640e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
6417807ef7bSDavid Woodhouse /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
6427807ef7bSDavid Woodhouse scan of this eraseblock. So return zero */
6437807ef7bSDavid Woodhouse if (ret == -ENOTRECOVERABLE)
6447807ef7bSDavid Woodhouse return 0;
645e631ddbaSFerenc Havasi if (ret)
6467807ef7bSDavid Woodhouse return ret; /* real error */
647e631ddbaSFerenc Havasi
648e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */
649046b8b98SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
6502f785402SDavid Woodhouse if (ret)
6512f785402SDavid Woodhouse return ret;
652e631ddbaSFerenc Havasi
653f61579c3SDavid Woodhouse sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);
654e631ddbaSFerenc Havasi
65549f11d40SDavid Woodhouse if (unlikely(jeb->free_size)) {
65649f11d40SDavid Woodhouse JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
65749f11d40SDavid Woodhouse jeb->free_size, jeb->offset);
658e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size;
659e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size;
660e631ddbaSFerenc Havasi c->free_size -= jeb->free_size;
661e631ddbaSFerenc Havasi jeb->free_size = 0;
66249f11d40SDavid Woodhouse }
663e631ddbaSFerenc Havasi
664e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb);
665e631ddbaSFerenc Havasi
666e631ddbaSFerenc Havasi crc_err:
667e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
668e631ddbaSFerenc Havasi
669e631ddbaSFerenc Havasi return 0;
670e631ddbaSFerenc Havasi }
671e631ddbaSFerenc Havasi
672e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
673e631ddbaSFerenc Havasi
jffs2_sum_write_data(struct jffs2_sb_info * c,struct jffs2_eraseblock * jeb,uint32_t infosize,uint32_t datasize,int padsize)674e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
675e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize)
676e631ddbaSFerenc Havasi {
6772bc9764cSFerenc Havasi struct jffs2_raw_summary isum;
678e631ddbaSFerenc Havasi union jffs2_sum_mem *temp;
679e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm;
680e631ddbaSFerenc Havasi struct kvec vecs[2];
6812f785402SDavid Woodhouse uint32_t sum_ofs;
682e631ddbaSFerenc Havasi void *wpage;
683e631ddbaSFerenc Havasi int ret;
684e631ddbaSFerenc Havasi size_t retlen;
685e631ddbaSFerenc Havasi
686b7600dbaSDavid Woodhouse if (padsize + datasize > MAX_SUMMARY_SIZE) {
687b7600dbaSDavid Woodhouse /* It won't fit in the buffer. Abort summary for this jeb */
688b7600dbaSDavid Woodhouse jffs2_sum_disable_collecting(c->summary);
689b7600dbaSDavid Woodhouse
690b7600dbaSDavid Woodhouse JFFS2_WARNING("Summary too big (%d data, %d pad) in eraseblock at %08x\n",
691b7600dbaSDavid Woodhouse datasize, padsize, jeb->offset);
692b7600dbaSDavid Woodhouse /* Non-fatal */
693b7600dbaSDavid Woodhouse return 0;
694b7600dbaSDavid Woodhouse }
695b7600dbaSDavid Woodhouse /* Is there enough space for summary? */
696b7600dbaSDavid Woodhouse if (padsize < 0) {
697b7600dbaSDavid Woodhouse /* don't try to write out summary for this jeb */
698b7600dbaSDavid Woodhouse jffs2_sum_disable_collecting(c->summary);
699b7600dbaSDavid Woodhouse
700b7600dbaSDavid Woodhouse JFFS2_WARNING("Not enough space for summary, padsize = %d\n",
701b7600dbaSDavid Woodhouse padsize);
702b7600dbaSDavid Woodhouse /* Non-fatal */
703b7600dbaSDavid Woodhouse return 0;
704b7600dbaSDavid Woodhouse }
705b7600dbaSDavid Woodhouse
706e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize);
707e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum));
708e631ddbaSFerenc Havasi
709e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
710e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
711e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize);
712e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
713e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded);
714e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
715e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num);
716e631ddbaSFerenc Havasi wpage = c->summary->sum_buf;
717e631ddbaSFerenc Havasi
718e631ddbaSFerenc Havasi while (c->summary->sum_num) {
71920ffdcb0SJesper Juhl temp = c->summary->sum_list_head;
720e631ddbaSFerenc Havasi
72120ffdcb0SJesper Juhl switch (je16_to_cpu(temp->u.nodetype)) {
722e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: {
723e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage;
724e631ddbaSFerenc Havasi
72520ffdcb0SJesper Juhl sino_ptr->nodetype = temp->i.nodetype;
72620ffdcb0SJesper Juhl sino_ptr->inode = temp->i.inode;
72720ffdcb0SJesper Juhl sino_ptr->version = temp->i.version;
72820ffdcb0SJesper Juhl sino_ptr->offset = temp->i.offset;
72920ffdcb0SJesper Juhl sino_ptr->totlen = temp->i.totlen;
730e631ddbaSFerenc Havasi
731e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE;
732e631ddbaSFerenc Havasi
733e631ddbaSFerenc Havasi break;
734e631ddbaSFerenc Havasi }
735e631ddbaSFerenc Havasi
736e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: {
737e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
738e631ddbaSFerenc Havasi
73920ffdcb0SJesper Juhl sdrnt_ptr->nodetype = temp->d.nodetype;
74020ffdcb0SJesper Juhl sdrnt_ptr->totlen = temp->d.totlen;
74120ffdcb0SJesper Juhl sdrnt_ptr->offset = temp->d.offset;
74220ffdcb0SJesper Juhl sdrnt_ptr->pino = temp->d.pino;
74320ffdcb0SJesper Juhl sdrnt_ptr->version = temp->d.version;
74420ffdcb0SJesper Juhl sdrnt_ptr->ino = temp->d.ino;
74520ffdcb0SJesper Juhl sdrnt_ptr->nsize = temp->d.nsize;
74620ffdcb0SJesper Juhl sdrnt_ptr->type = temp->d.type;
747e631ddbaSFerenc Havasi
74820ffdcb0SJesper Juhl memcpy(sdrnt_ptr->name, temp->d.name,
74920ffdcb0SJesper Juhl temp->d.nsize);
750e631ddbaSFerenc Havasi
75120ffdcb0SJesper Juhl wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
752e631ddbaSFerenc Havasi
753e631ddbaSFerenc Havasi break;
754e631ddbaSFerenc Havasi }
755aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR
756aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: {
757aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
758e631ddbaSFerenc Havasi
759aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head;
760aa98d7cfSKaiGai Kohei sxattr_ptr->nodetype = temp->x.nodetype;
761aa98d7cfSKaiGai Kohei sxattr_ptr->xid = temp->x.xid;
762aa98d7cfSKaiGai Kohei sxattr_ptr->version = temp->x.version;
763aa98d7cfSKaiGai Kohei sxattr_ptr->offset = temp->x.offset;
764aa98d7cfSKaiGai Kohei sxattr_ptr->totlen = temp->x.totlen;
765aa98d7cfSKaiGai Kohei
766aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XATTR_SIZE;
767aa98d7cfSKaiGai Kohei break;
768aa98d7cfSKaiGai Kohei }
769aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: {
770aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *sxref_ptr = wpage;
771aa98d7cfSKaiGai Kohei
772aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head;
773aa98d7cfSKaiGai Kohei sxref_ptr->nodetype = temp->r.nodetype;
774aa98d7cfSKaiGai Kohei sxref_ptr->offset = temp->r.offset;
775aa98d7cfSKaiGai Kohei
776aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XREF_SIZE;
777aa98d7cfSKaiGai Kohei break;
778aa98d7cfSKaiGai Kohei }
779aa98d7cfSKaiGai Kohei #endif
780e631ddbaSFerenc Havasi default : {
7816171586aSDavid Woodhouse if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
7826171586aSDavid Woodhouse == JFFS2_FEATURE_RWCOMPAT_COPY) {
7836171586aSDavid Woodhouse dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
7846171586aSDavid Woodhouse je16_to_cpu(temp->u.nodetype));
7856171586aSDavid Woodhouse jffs2_sum_disable_collecting(c->summary);
786*19646447STom Rix /* The above call removes the list, nothing more to do */
787*19646447STom Rix goto bail_rwcompat;
7886171586aSDavid Woodhouse } else {
789e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */
790e631ddbaSFerenc Havasi }
791e631ddbaSFerenc Havasi }
7926171586aSDavid Woodhouse }
793e631ddbaSFerenc Havasi
79420ffdcb0SJesper Juhl c->summary->sum_list_head = temp->u.next;
795e631ddbaSFerenc Havasi kfree(temp);
796e631ddbaSFerenc Havasi
797e631ddbaSFerenc Havasi c->summary->sum_num--;
798e631ddbaSFerenc Havasi }
799*19646447STom Rix bail_rwcompat:
800e631ddbaSFerenc Havasi
801e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary);
802e631ddbaSFerenc Havasi
803e631ddbaSFerenc Havasi wpage += padsize;
804e631ddbaSFerenc Havasi
805e631ddbaSFerenc Havasi sm = wpage;
806e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
807e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
808e631ddbaSFerenc Havasi
809e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
810e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
811e631ddbaSFerenc Havasi
812e631ddbaSFerenc Havasi vecs[0].iov_base = &isum;
813e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum);
814e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf;
815e631ddbaSFerenc Havasi vecs[1].iov_len = datasize;
816e631ddbaSFerenc Havasi
8172f785402SDavid Woodhouse sum_ofs = jeb->offset + c->sector_size - jeb->free_size;
818e631ddbaSFerenc Havasi
8195a528957SJoe Perches dbg_summary("writing out data to flash to pos : 0x%08x\n", sum_ofs);
8202f785402SDavid Woodhouse
8212f785402SDavid Woodhouse ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);
822e631ddbaSFerenc Havasi
823e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) {
824010b06d6SDavid Woodhouse
825c41ff6e5SDavid Woodhouse JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
8262f785402SDavid Woodhouse infosize, sum_ofs, ret, retlen);
827e631ddbaSFerenc Havasi
8289bfeb691SDavid Woodhouse if (retlen) {
829010b06d6SDavid Woodhouse /* Waste remaining space */
830010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock);
8312f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
8322f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock);
8339bfeb691SDavid Woodhouse }
834010b06d6SDavid Woodhouse
835e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
836e631ddbaSFerenc Havasi
8372f785402SDavid Woodhouse return 0;
838e631ddbaSFerenc Havasi }
839e631ddbaSFerenc Havasi
840010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock);
8412f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
8422f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock);
843010b06d6SDavid Woodhouse
844e631ddbaSFerenc Havasi return 0;
845e631ddbaSFerenc Havasi }
846e631ddbaSFerenc Havasi
847e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */
848e631ddbaSFerenc Havasi
jffs2_sum_write_sumnode(struct jffs2_sb_info * c)849e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
8507f4028b2SFabian Frederick __must_hold(&c->erase_completion_block)
851e631ddbaSFerenc Havasi {
8522f785402SDavid Woodhouse int datasize, infosize, padsize;
853e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb;
854b7600dbaSDavid Woodhouse int ret = 0;
855e631ddbaSFerenc Havasi
856733802d9SArtem B. Bityutskiy dbg_summary("called\n");
857e631ddbaSFerenc Havasi
8582f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock);
8592f785402SDavid Woodhouse
860e631ddbaSFerenc Havasi jeb = c->nextblock;
861046b8b98SDavid Woodhouse jffs2_prealloc_raw_node_refs(c, jeb, 1);
862e631ddbaSFerenc Havasi
863e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) {
864e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n");
865e631ddbaSFerenc Havasi BUG();
866e631ddbaSFerenc Havasi }
867e631ddbaSFerenc Havasi
868e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
8692bc9764cSFerenc Havasi infosize = sizeof(struct jffs2_raw_summary) + datasize;
870e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize;
871e631ddbaSFerenc Havasi infosize += padsize;
872e631ddbaSFerenc Havasi datasize += padsize;
873e631ddbaSFerenc Havasi
874e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
875010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock);
8762f785402SDavid Woodhouse return ret;
877e631ddbaSFerenc Havasi }
878