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 14e631ddbaSFerenc Havasi #include <linux/kernel.h> 15e631ddbaSFerenc Havasi #include <linux/slab.h> 16e631ddbaSFerenc Havasi #include <linux/mtd/mtd.h> 17e631ddbaSFerenc Havasi #include <linux/pagemap.h> 18e631ddbaSFerenc Havasi #include <linux/crc32.h> 19e631ddbaSFerenc Havasi #include <linux/compiler.h> 20e631ddbaSFerenc Havasi #include <linux/vmalloc.h> 21e631ddbaSFerenc Havasi #include "nodelist.h" 22e631ddbaSFerenc Havasi #include "debug.h" 23e631ddbaSFerenc Havasi 24e631ddbaSFerenc Havasi int jffs2_sum_init(struct jffs2_sb_info *c) 25e631ddbaSFerenc Havasi { 260fed784bSRoel Kluin uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE); 27b7600dbaSDavid Woodhouse 283d375d9eSYan Burman c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); 29e631ddbaSFerenc Havasi 30e631ddbaSFerenc Havasi if (!c->summary) { 31e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate memory for summary information!\n"); 32e631ddbaSFerenc Havasi return -ENOMEM; 33e631ddbaSFerenc Havasi } 34e631ddbaSFerenc Havasi 35b7600dbaSDavid Woodhouse c->summary->sum_buf = kmalloc(sum_size, GFP_KERNEL); 36e631ddbaSFerenc Havasi 37e631ddbaSFerenc Havasi if (!c->summary->sum_buf) { 38e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 39733802d9SArtem B. Bityutskiy kfree(c->summary); 40e631ddbaSFerenc Havasi return -ENOMEM; 41e631ddbaSFerenc Havasi } 42e631ddbaSFerenc Havasi 43d6e05edcSAndreas Mohr dbg_summary("returned successfully\n"); 44e631ddbaSFerenc Havasi 45e631ddbaSFerenc Havasi return 0; 46e631ddbaSFerenc Havasi } 47e631ddbaSFerenc Havasi 48e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c) 49e631ddbaSFerenc Havasi { 50733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 51e631ddbaSFerenc Havasi 52e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 53e631ddbaSFerenc Havasi 54b7600dbaSDavid Woodhouse kfree(c->summary->sum_buf); 55e631ddbaSFerenc Havasi c->summary->sum_buf = NULL; 56e631ddbaSFerenc Havasi 57e631ddbaSFerenc Havasi kfree(c->summary); 58e631ddbaSFerenc Havasi c->summary = NULL; 59e631ddbaSFerenc Havasi } 60e631ddbaSFerenc Havasi 61e631ddbaSFerenc Havasi static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) 62e631ddbaSFerenc Havasi { 63e631ddbaSFerenc Havasi if (!s->sum_list_head) 64e631ddbaSFerenc Havasi s->sum_list_head = (union jffs2_sum_mem *) item; 65e631ddbaSFerenc Havasi if (s->sum_list_tail) 66e631ddbaSFerenc Havasi s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; 67e631ddbaSFerenc Havasi s->sum_list_tail = (union jffs2_sum_mem *) item; 68e631ddbaSFerenc Havasi 69e631ddbaSFerenc Havasi switch (je16_to_cpu(item->u.nodetype)) { 70e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: 71e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_INODE_SIZE; 72e631ddbaSFerenc Havasi s->sum_num++; 73733802d9SArtem B. Bityutskiy dbg_summary("inode (%u) added to summary\n", 74e631ddbaSFerenc Havasi je32_to_cpu(item->i.inode)); 75e631ddbaSFerenc Havasi break; 76e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: 77e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); 78e631ddbaSFerenc Havasi s->sum_num++; 79733802d9SArtem B. Bityutskiy dbg_summary("dirent (%u) added to summary\n", 80e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino)); 81e631ddbaSFerenc Havasi break; 82aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 83aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: 84aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; 85aa98d7cfSKaiGai Kohei s->sum_num++; 86aa98d7cfSKaiGai Kohei dbg_summary("xattr (xid=%u, version=%u) added to summary\n", 87aa98d7cfSKaiGai Kohei je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); 88aa98d7cfSKaiGai Kohei break; 89aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: 90aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XREF_SIZE; 91aa98d7cfSKaiGai Kohei s->sum_num++; 92aa98d7cfSKaiGai Kohei dbg_summary("xref added to summary\n"); 93aa98d7cfSKaiGai Kohei break; 94aa98d7cfSKaiGai Kohei #endif 95e631ddbaSFerenc Havasi default: 96e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n", 97e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype)); 98e631ddbaSFerenc Havasi return 1; 99e631ddbaSFerenc Havasi } 100e631ddbaSFerenc Havasi return 0; 101e631ddbaSFerenc Havasi } 102e631ddbaSFerenc Havasi 103e631ddbaSFerenc Havasi 104e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 105e631ddbaSFerenc Havasi 106e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 107e631ddbaSFerenc Havasi { 108733802d9SArtem B. Bityutskiy dbg_summary("called with %u\n", size); 109e631ddbaSFerenc Havasi s->sum_padded += size; 110e631ddbaSFerenc Havasi return 0; 111e631ddbaSFerenc Havasi } 112e631ddbaSFerenc Havasi 113e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 114e631ddbaSFerenc Havasi uint32_t ofs) 115e631ddbaSFerenc Havasi { 116e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 117e631ddbaSFerenc Havasi 118e631ddbaSFerenc Havasi if (!temp) 119e631ddbaSFerenc Havasi return -ENOMEM; 120e631ddbaSFerenc Havasi 121e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype; 122e631ddbaSFerenc Havasi temp->inode = ri->ino; 123e631ddbaSFerenc Havasi temp->version = ri->version; 12425985edcSLucas De Marchi temp->offset = cpu_to_je32(ofs); /* relative offset from the beginning of the jeb */ 125e631ddbaSFerenc Havasi temp->totlen = ri->totlen; 126e631ddbaSFerenc Havasi temp->next = NULL; 127e631ddbaSFerenc Havasi 128e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 129e631ddbaSFerenc Havasi } 130e631ddbaSFerenc Havasi 131e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 132e631ddbaSFerenc Havasi uint32_t ofs) 133e631ddbaSFerenc Havasi { 134e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 135e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 136e631ddbaSFerenc Havasi 137e631ddbaSFerenc Havasi if (!temp) 138e631ddbaSFerenc Havasi return -ENOMEM; 139e631ddbaSFerenc Havasi 140e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype; 141e631ddbaSFerenc Havasi temp->totlen = rd->totlen; 14225985edcSLucas De Marchi temp->offset = cpu_to_je32(ofs); /* relative from the beginning of the jeb */ 143e631ddbaSFerenc Havasi temp->pino = rd->pino; 144e631ddbaSFerenc Havasi temp->version = rd->version; 145e631ddbaSFerenc Havasi temp->ino = rd->ino; 146e631ddbaSFerenc Havasi temp->nsize = rd->nsize; 147e631ddbaSFerenc Havasi temp->type = rd->type; 148e631ddbaSFerenc Havasi temp->next = NULL; 149e631ddbaSFerenc Havasi 150e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize); 151e631ddbaSFerenc Havasi 152e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 153e631ddbaSFerenc Havasi } 154e631ddbaSFerenc Havasi 155aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 156aa98d7cfSKaiGai Kohei int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) 157aa98d7cfSKaiGai Kohei { 158aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 159aa98d7cfSKaiGai Kohei 160aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 161aa98d7cfSKaiGai Kohei if (!temp) 162aa98d7cfSKaiGai Kohei return -ENOMEM; 163aa98d7cfSKaiGai Kohei 164aa98d7cfSKaiGai Kohei temp->nodetype = rx->nodetype; 165aa98d7cfSKaiGai Kohei temp->xid = rx->xid; 166aa98d7cfSKaiGai Kohei temp->version = rx->version; 167aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 168aa98d7cfSKaiGai Kohei temp->totlen = rx->totlen; 169aa98d7cfSKaiGai Kohei temp->next = NULL; 170aa98d7cfSKaiGai Kohei 171aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 172aa98d7cfSKaiGai Kohei } 173aa98d7cfSKaiGai Kohei 174aa98d7cfSKaiGai Kohei int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) 175aa98d7cfSKaiGai Kohei { 176aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 177aa98d7cfSKaiGai Kohei 178aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 179aa98d7cfSKaiGai Kohei if (!temp) 180aa98d7cfSKaiGai Kohei return -ENOMEM; 181aa98d7cfSKaiGai Kohei 182aa98d7cfSKaiGai Kohei temp->nodetype = rr->nodetype; 183aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 184aa98d7cfSKaiGai Kohei temp->next = NULL; 185aa98d7cfSKaiGai Kohei 186aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 187aa98d7cfSKaiGai Kohei } 188aa98d7cfSKaiGai Kohei #endif 189e631ddbaSFerenc Havasi /* Cleanup every collected summary information */ 190e631ddbaSFerenc Havasi 191e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s) 192e631ddbaSFerenc Havasi { 193e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 194e631ddbaSFerenc Havasi 195e631ddbaSFerenc Havasi if (!s->sum_list_head) { 196733802d9SArtem B. Bityutskiy dbg_summary("already empty\n"); 197e631ddbaSFerenc Havasi } 198e631ddbaSFerenc Havasi while (s->sum_list_head) { 199e631ddbaSFerenc Havasi temp = s->sum_list_head; 200e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next; 201e631ddbaSFerenc Havasi kfree(temp); 202e631ddbaSFerenc Havasi } 203e631ddbaSFerenc Havasi s->sum_list_tail = NULL; 204e631ddbaSFerenc Havasi s->sum_padded = 0; 205e631ddbaSFerenc Havasi s->sum_num = 0; 206e631ddbaSFerenc Havasi } 207e631ddbaSFerenc Havasi 208e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s) 209e631ddbaSFerenc Havasi { 210733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 211e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 212e631ddbaSFerenc Havasi s->sum_size = 0; 213e631ddbaSFerenc Havasi } 214e631ddbaSFerenc Havasi 215e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s) 216e631ddbaSFerenc Havasi { 217733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 218e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 219e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 220e631ddbaSFerenc Havasi } 221e631ddbaSFerenc Havasi 222e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s) 223e631ddbaSFerenc Havasi { 224e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 225e631ddbaSFerenc Havasi } 226e631ddbaSFerenc Havasi 227e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */ 228e631ddbaSFerenc Havasi 229e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 230e631ddbaSFerenc Havasi { 231733802d9SArtem B. Bityutskiy dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 232e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num, 233e631ddbaSFerenc Havasi s->sum_size, s->sum_num); 234e631ddbaSFerenc Havasi 235e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size; 236e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num; 237e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded; 238e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head; 239e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail; 240e631ddbaSFerenc Havasi 241e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL; 242e631ddbaSFerenc Havasi } 243e631ddbaSFerenc Havasi 244e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */ 245e631ddbaSFerenc Havasi 246e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 247e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs) 248e631ddbaSFerenc Havasi { 249e631ddbaSFerenc Havasi union jffs2_node_union *node; 250e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 251e631ddbaSFerenc Havasi 25227bea327SZoltan Sogor if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { 25327bea327SZoltan Sogor dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n"); 25427bea327SZoltan Sogor return 0; 25527bea327SZoltan Sogor } 25627bea327SZoltan Sogor 257e631ddbaSFerenc Havasi node = invecs[0].iov_base; 258e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size]; 259e631ddbaSFerenc Havasi ofs -= jeb->offset; 260e631ddbaSFerenc Havasi 261e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) { 262e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 263e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = 264e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 265e631ddbaSFerenc Havasi 266e631ddbaSFerenc Havasi if (!temp) 267e631ddbaSFerenc Havasi goto no_mem; 268e631ddbaSFerenc Havasi 269e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype; 270e631ddbaSFerenc Havasi temp->inode = node->i.ino; 271e631ddbaSFerenc Havasi temp->version = node->i.version; 272e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 273e631ddbaSFerenc Havasi temp->totlen = node->i.totlen; 274e631ddbaSFerenc Havasi temp->next = NULL; 275e631ddbaSFerenc Havasi 276e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 277e631ddbaSFerenc Havasi } 278e631ddbaSFerenc Havasi 279e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 280e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 281e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 282e631ddbaSFerenc Havasi 283e631ddbaSFerenc Havasi if (!temp) 284e631ddbaSFerenc Havasi goto no_mem; 285e631ddbaSFerenc Havasi 286e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype; 287e631ddbaSFerenc Havasi temp->totlen = node->d.totlen; 288e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 289e631ddbaSFerenc Havasi temp->pino = node->d.pino; 290e631ddbaSFerenc Havasi temp->version = node->d.version; 291e631ddbaSFerenc Havasi temp->ino = node->d.ino; 292e631ddbaSFerenc Havasi temp->nsize = node->d.nsize; 293e631ddbaSFerenc Havasi temp->type = node->d.type; 294e631ddbaSFerenc Havasi temp->next = NULL; 295e631ddbaSFerenc Havasi 296e631ddbaSFerenc Havasi switch (count) { 297e631ddbaSFerenc Havasi case 1: 298e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize); 299e631ddbaSFerenc Havasi break; 300e631ddbaSFerenc Havasi 301e631ddbaSFerenc Havasi case 2: 302e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 303e631ddbaSFerenc Havasi break; 304e631ddbaSFerenc Havasi 305e631ddbaSFerenc Havasi default: 306e631ddbaSFerenc Havasi BUG(); /* impossible count value */ 307e631ddbaSFerenc Havasi break; 308e631ddbaSFerenc Havasi } 309e631ddbaSFerenc Havasi 310e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 311e631ddbaSFerenc Havasi } 312aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 313aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 314aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 315aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 316aa98d7cfSKaiGai Kohei if (!temp) 317aa98d7cfSKaiGai Kohei goto no_mem; 318e631ddbaSFerenc Havasi 319aa98d7cfSKaiGai Kohei temp->nodetype = node->x.nodetype; 320aa98d7cfSKaiGai Kohei temp->xid = node->x.xid; 321aa98d7cfSKaiGai Kohei temp->version = node->x.version; 322aa98d7cfSKaiGai Kohei temp->totlen = node->x.totlen; 323aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 324aa98d7cfSKaiGai Kohei temp->next = NULL; 325aa98d7cfSKaiGai Kohei 326aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 327aa98d7cfSKaiGai Kohei } 328aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 329aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 330aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 331aa98d7cfSKaiGai Kohei if (!temp) 332aa98d7cfSKaiGai Kohei goto no_mem; 333aa98d7cfSKaiGai Kohei temp->nodetype = node->r.nodetype; 334aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 335aa98d7cfSKaiGai Kohei temp->next = NULL; 336aa98d7cfSKaiGai Kohei 337aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 338aa98d7cfSKaiGai Kohei } 339aa98d7cfSKaiGai Kohei #endif 340e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING: 341733802d9SArtem B. Bityutskiy dbg_summary("node PADDING\n"); 342e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen); 343e631ddbaSFerenc Havasi break; 344e631ddbaSFerenc Havasi 345e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER: 346733802d9SArtem B. Bityutskiy dbg_summary("node CLEANMARKER\n"); 347e631ddbaSFerenc Havasi break; 348e631ddbaSFerenc Havasi 349e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY: 350733802d9SArtem B. Bityutskiy dbg_summary("node SUMMARY\n"); 351e631ddbaSFerenc Havasi break; 352e631ddbaSFerenc Havasi 353e631ddbaSFerenc Havasi default: 354e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement 355e631ddbaSFerenc Havasi summary support for it or disable summary. 356e631ddbaSFerenc Havasi */ 357e631ddbaSFerenc Havasi BUG(); 358e631ddbaSFerenc Havasi break; 359e631ddbaSFerenc Havasi } 360e631ddbaSFerenc Havasi 361e631ddbaSFerenc Havasi return 0; 362e631ddbaSFerenc Havasi 363e631ddbaSFerenc Havasi no_mem: 364e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 365e631ddbaSFerenc Havasi return -ENOMEM; 366e631ddbaSFerenc Havasi } 367e631ddbaSFerenc Havasi 3682f785402SDavid Woodhouse static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, 3692f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3702f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 3712f785402SDavid Woodhouse struct jffs2_inode_cache *ic) 37249f11d40SDavid Woodhouse { 37349f11d40SDavid Woodhouse /* If there was a gap, mark it dirty */ 3742f785402SDavid Woodhouse if ((ofs & ~3) > c->sector_size - jeb->free_size) { 3752f785402SDavid Woodhouse /* Ew. Summary doesn't actually tell us explicitly about dirty space */ 3762f785402SDavid Woodhouse jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); 37749f11d40SDavid Woodhouse } 37849f11d40SDavid Woodhouse 3792f785402SDavid Woodhouse return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); 38049f11d40SDavid Woodhouse } 381e631ddbaSFerenc Havasi 382e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 383e631ddbaSFerenc Havasi 384e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 3852bc9764cSFerenc Havasi struct jffs2_raw_summary *summary, uint32_t *pseudo_random) 386e631ddbaSFerenc Havasi { 387e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic; 388e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd; 389e631ddbaSFerenc Havasi void *sp; 390e631ddbaSFerenc Havasi int i, ino; 39168270995SDavid Woodhouse int err; 392e631ddbaSFerenc Havasi 393e631ddbaSFerenc Havasi sp = summary->sum; 394e631ddbaSFerenc Havasi 395e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 396733802d9SArtem B. Bityutskiy dbg_summary("processing summary index %d\n", i); 397e631ddbaSFerenc Havasi 398a2166b93SArtem Bityutskiy cond_resched(); 399a2166b93SArtem Bityutskiy 4002f785402SDavid Woodhouse /* Make sure there's a spare ref for dirty space */ 401046b8b98SDavid Woodhouse err = jffs2_prealloc_raw_node_refs(c, jeb, 2); 4022f785402SDavid Woodhouse if (err) 4032f785402SDavid Woodhouse return err; 4042f785402SDavid Woodhouse 405e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 406e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 407e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi; 408e631ddbaSFerenc Havasi spi = sp; 409e631ddbaSFerenc Havasi 410e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode); 411e631ddbaSFerenc Havasi 4129167e0f8SDavid Woodhouse dbg_summary("Inode at 0x%08x-0x%08x\n", 4139167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset), 4148b9e9fe8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); 415e631ddbaSFerenc Havasi 416e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino); 417e631ddbaSFerenc Havasi if (!ic) { 418e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n"); 419e631ddbaSFerenc Havasi return -ENOMEM; 420e631ddbaSFerenc Havasi } 421e631ddbaSFerenc Havasi 4222f785402SDavid Woodhouse sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, 4232f785402SDavid Woodhouse PAD(je32_to_cpu(spi->totlen)), ic); 424f1f9671bSDavid Woodhouse 425f1f9671bSDavid Woodhouse *pseudo_random += je32_to_cpu(spi->version); 426e631ddbaSFerenc Havasi 427e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE; 428e631ddbaSFerenc Havasi 429e631ddbaSFerenc Havasi break; 430e631ddbaSFerenc Havasi } 431e631ddbaSFerenc Havasi 432e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 433e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd; 434b534e70cSDavid Woodhouse int checkedlen; 435e631ddbaSFerenc Havasi spd = sp; 436e631ddbaSFerenc Havasi 4378b9e9fe8SDavid Woodhouse dbg_summary("Dirent at 0x%08x-0x%08x\n", 4389167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset), 4399167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); 4409167e0f8SDavid Woodhouse 441e631ddbaSFerenc Havasi 442b534e70cSDavid Woodhouse /* This should never happen, but https://dev.laptop.org/ticket/4184 */ 443b534e70cSDavid Woodhouse checkedlen = strnlen(spd->name, spd->nsize); 444b534e70cSDavid Woodhouse if (!checkedlen) { 445da320f05SJoe Perches pr_err("Dirent at %08x has zero at start of name. Aborting mount.\n", 446da320f05SJoe Perches jeb->offset + 447da320f05SJoe Perches je32_to_cpu(spd->offset)); 448b534e70cSDavid Woodhouse return -EIO; 449b534e70cSDavid Woodhouse } 450b534e70cSDavid Woodhouse if (checkedlen < spd->nsize) { 451da320f05SJoe Perches pr_err("Dirent at %08x has zeroes in name. Truncating to %d chars\n", 452da320f05SJoe Perches jeb->offset + 453da320f05SJoe Perches je32_to_cpu(spd->offset), 454da320f05SJoe Perches checkedlen); 455b534e70cSDavid Woodhouse } 456b534e70cSDavid Woodhouse 457b534e70cSDavid Woodhouse 458b534e70cSDavid Woodhouse fd = jffs2_alloc_full_dirent(checkedlen+1); 4599641b784SDavid Woodhouse if (!fd) 460e631ddbaSFerenc Havasi return -ENOMEM; 461e631ddbaSFerenc Havasi 462b534e70cSDavid Woodhouse memcpy(&fd->name, spd->name, checkedlen); 463b534e70cSDavid Woodhouse fd->name[checkedlen] = 0; 464e631ddbaSFerenc Havasi 465e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 466e631ddbaSFerenc Havasi if (!ic) { 467e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 468e631ddbaSFerenc Havasi return -ENOMEM; 469e631ddbaSFerenc Havasi } 470e631ddbaSFerenc Havasi 4711046d880SDavid Woodhouse fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, 4722f785402SDavid Woodhouse PAD(je32_to_cpu(spd->totlen)), ic); 473e631ddbaSFerenc Havasi 474e631ddbaSFerenc Havasi fd->next = NULL; 475e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version); 476e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino); 477b534e70cSDavid Woodhouse fd->nhash = full_name_hash(fd->name, checkedlen); 478e631ddbaSFerenc Havasi fd->type = spd->type; 479f1f9671bSDavid Woodhouse 480e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 481e631ddbaSFerenc Havasi 482e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version); 483e631ddbaSFerenc Havasi 484e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 485e631ddbaSFerenc Havasi 486e631ddbaSFerenc Havasi break; 487e631ddbaSFerenc Havasi } 488aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 489aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 490aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 491aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *spx; 492e631ddbaSFerenc Havasi 493aa98d7cfSKaiGai Kohei spx = (struct jffs2_sum_xattr_flash *)sp; 4949167e0f8SDavid Woodhouse dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 49549f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset), 4969167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), 497aa98d7cfSKaiGai Kohei je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); 4982f785402SDavid Woodhouse 499aa98d7cfSKaiGai Kohei xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), 500aa98d7cfSKaiGai Kohei je32_to_cpu(spx->version)); 501c9f700f8SKaiGai Kohei if (IS_ERR(xd)) 502aa98d7cfSKaiGai Kohei return PTR_ERR(xd); 503c9f700f8SKaiGai Kohei if (xd->version > je32_to_cpu(spx->version)) { 504c9f700f8SKaiGai Kohei /* node is not the newest one */ 505c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw 506c9f700f8SKaiGai Kohei = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 5072f785402SDavid Woodhouse PAD(je32_to_cpu(spx->totlen)), NULL); 508c9f700f8SKaiGai Kohei raw->next_in_ino = xd->node->next_in_ino; 509c9f700f8SKaiGai Kohei xd->node->next_in_ino = raw; 510c9f700f8SKaiGai Kohei } else { 511c9f700f8SKaiGai Kohei xd->version = je32_to_cpu(spx->version); 512c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 513c9f700f8SKaiGai Kohei PAD(je32_to_cpu(spx->totlen)), (void *)xd); 514c9f700f8SKaiGai Kohei } 515aa98d7cfSKaiGai Kohei *pseudo_random += je32_to_cpu(spx->xid); 516aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XATTR_SIZE; 517aa98d7cfSKaiGai Kohei 518aa98d7cfSKaiGai Kohei break; 519aa98d7cfSKaiGai Kohei } 520aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 521aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 522aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *spr; 523aa98d7cfSKaiGai Kohei 524aa98d7cfSKaiGai Kohei spr = (struct jffs2_sum_xref_flash *)sp; 5259167e0f8SDavid Woodhouse dbg_summary("xref at %#08x-%#08x\n", 52649f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset), 5279bfeb691SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset) + 5289bfeb691SDavid Woodhouse (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); 5299167e0f8SDavid Woodhouse 530aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 531aa98d7cfSKaiGai Kohei if (!ref) { 532aa98d7cfSKaiGai Kohei JFFS2_NOTICE("allocation of xattr_datum failed\n"); 533aa98d7cfSKaiGai Kohei return -ENOMEM; 534aa98d7cfSKaiGai Kohei } 5358f2b6f49SKaiGai Kohei ref->next = c->xref_temp; 5368f2b6f49SKaiGai Kohei c->xref_temp = ref; 537aa98d7cfSKaiGai Kohei 538c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, 539c9f700f8SKaiGai Kohei PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); 540aa98d7cfSKaiGai Kohei 5412f785402SDavid Woodhouse *pseudo_random += ref->node->flash_offset; 542aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XREF_SIZE; 543aa98d7cfSKaiGai Kohei 544aa98d7cfSKaiGai Kohei break; 545aa98d7cfSKaiGai Kohei } 546aa98d7cfSKaiGai Kohei #endif 547e631ddbaSFerenc Havasi default : { 5487807ef7bSDavid Woodhouse uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); 5497807ef7bSDavid Woodhouse JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); 5507807ef7bSDavid Woodhouse if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) 551e631ddbaSFerenc Havasi return -EIO; 5527807ef7bSDavid Woodhouse 5537807ef7bSDavid Woodhouse /* For compatible node types, just fall back to the full scan */ 5547807ef7bSDavid Woodhouse c->wasted_size -= jeb->wasted_size; 5557807ef7bSDavid Woodhouse c->free_size += c->sector_size - jeb->free_size; 5567807ef7bSDavid Woodhouse c->used_size -= jeb->used_size; 5577807ef7bSDavid Woodhouse c->dirty_size -= jeb->dirty_size; 5587807ef7bSDavid Woodhouse jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; 5597807ef7bSDavid Woodhouse jeb->free_size = c->sector_size; 5607807ef7bSDavid Woodhouse 561c38c1b61SDavid Woodhouse jffs2_free_jeb_node_refs(c, jeb); 5627807ef7bSDavid Woodhouse return -ENOTRECOVERABLE; 563e631ddbaSFerenc Havasi } 564e631ddbaSFerenc Havasi } 565e631ddbaSFerenc Havasi } 566e631ddbaSFerenc Havasi return 0; 567e631ddbaSFerenc Havasi } 568e631ddbaSFerenc Havasi 569e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */ 570e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 5719641b784SDavid Woodhouse struct jffs2_raw_summary *summary, uint32_t sumsize, 5729641b784SDavid Woodhouse uint32_t *pseudo_random) 573e631ddbaSFerenc Havasi { 574e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode; 5759641b784SDavid Woodhouse int ret, ofs; 576e631ddbaSFerenc Havasi uint32_t crc; 577e631ddbaSFerenc Havasi 57849f11d40SDavid Woodhouse ofs = c->sector_size - sumsize; 579e631ddbaSFerenc Havasi 580733802d9SArtem B. Bityutskiy dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 58149f11d40SDavid Woodhouse jeb->offset, jeb->offset + ofs, sumsize); 582e631ddbaSFerenc Havasi 583e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */ 584e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 585e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 586e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen; 587e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4); 588e631ddbaSFerenc Havasi 589e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) { 590733802d9SArtem B. Bityutskiy dbg_summary("Summary node header is corrupt (bad CRC or " 591e631ddbaSFerenc Havasi "no summary at all)\n"); 592e631ddbaSFerenc Havasi goto crc_err; 593e631ddbaSFerenc Havasi } 594e631ddbaSFerenc Havasi 595e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) { 596733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); 597e631ddbaSFerenc Havasi goto crc_err; 598e631ddbaSFerenc Havasi } 599e631ddbaSFerenc Havasi 6002bc9764cSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); 601e631ddbaSFerenc Havasi 602e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) { 603733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (bad CRC)\n"); 604e631ddbaSFerenc Havasi goto crc_err; 605e631ddbaSFerenc Havasi } 606e631ddbaSFerenc Havasi 6072bc9764cSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); 608e631ddbaSFerenc Havasi 609e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) { 610733802d9SArtem B. Bityutskiy dbg_summary("Summary node data is corrupt (bad CRC)\n"); 611e631ddbaSFerenc Havasi goto crc_err; 612e631ddbaSFerenc Havasi } 613e631ddbaSFerenc Havasi 614e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) { 615e631ddbaSFerenc Havasi 616733802d9SArtem B. Bityutskiy dbg_summary("Summary : CLEANMARKER node \n"); 617e631ddbaSFerenc Havasi 618098a1981SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); 619098a1981SDavid Woodhouse if (ret) 620098a1981SDavid Woodhouse return ret; 621098a1981SDavid Woodhouse 622e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 623733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 624e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 625098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 626098a1981SDavid Woodhouse return ret; 627e631ddbaSFerenc Havasi } else if (jeb->first_node) { 628733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node not first node in block " 629e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset); 630098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 631098a1981SDavid Woodhouse return ret; 632e631ddbaSFerenc Havasi } else { 6332f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, 6342f785402SDavid Woodhouse je32_to_cpu(summary->cln_mkr), NULL); 635e631ddbaSFerenc Havasi } 636e631ddbaSFerenc Havasi } 637e631ddbaSFerenc Havasi 638e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 6397807ef7bSDavid Woodhouse /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full 6407807ef7bSDavid Woodhouse scan of this eraseblock. So return zero */ 6417807ef7bSDavid Woodhouse if (ret == -ENOTRECOVERABLE) 6427807ef7bSDavid Woodhouse return 0; 643e631ddbaSFerenc Havasi if (ret) 6447807ef7bSDavid Woodhouse return ret; /* real error */ 645e631ddbaSFerenc Havasi 646e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */ 647046b8b98SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); 6482f785402SDavid Woodhouse if (ret) 6492f785402SDavid Woodhouse return ret; 650e631ddbaSFerenc Havasi 651f61579c3SDavid Woodhouse sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); 652e631ddbaSFerenc Havasi 65349f11d40SDavid Woodhouse if (unlikely(jeb->free_size)) { 65449f11d40SDavid Woodhouse JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", 65549f11d40SDavid Woodhouse jeb->free_size, jeb->offset); 656e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size; 657e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size; 658e631ddbaSFerenc Havasi c->free_size -= jeb->free_size; 659e631ddbaSFerenc Havasi jeb->free_size = 0; 66049f11d40SDavid Woodhouse } 661e631ddbaSFerenc Havasi 662e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb); 663e631ddbaSFerenc Havasi 664e631ddbaSFerenc Havasi crc_err: 665e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 666e631ddbaSFerenc Havasi 667e631ddbaSFerenc Havasi return 0; 668e631ddbaSFerenc Havasi } 669e631ddbaSFerenc Havasi 670e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 671e631ddbaSFerenc Havasi 672e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 673e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize) 674e631ddbaSFerenc Havasi { 6752bc9764cSFerenc Havasi struct jffs2_raw_summary isum; 676e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 677e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm; 678e631ddbaSFerenc Havasi struct kvec vecs[2]; 6792f785402SDavid Woodhouse uint32_t sum_ofs; 680e631ddbaSFerenc Havasi void *wpage; 681e631ddbaSFerenc Havasi int ret; 682e631ddbaSFerenc Havasi size_t retlen; 683e631ddbaSFerenc Havasi 684b7600dbaSDavid Woodhouse if (padsize + datasize > MAX_SUMMARY_SIZE) { 685b7600dbaSDavid Woodhouse /* It won't fit in the buffer. Abort summary for this jeb */ 686b7600dbaSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 687b7600dbaSDavid Woodhouse 688b7600dbaSDavid Woodhouse JFFS2_WARNING("Summary too big (%d data, %d pad) in eraseblock at %08x\n", 689b7600dbaSDavid Woodhouse datasize, padsize, jeb->offset); 690b7600dbaSDavid Woodhouse /* Non-fatal */ 691b7600dbaSDavid Woodhouse return 0; 692b7600dbaSDavid Woodhouse } 693b7600dbaSDavid Woodhouse /* Is there enough space for summary? */ 694b7600dbaSDavid Woodhouse if (padsize < 0) { 695b7600dbaSDavid Woodhouse /* don't try to write out summary for this jeb */ 696b7600dbaSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 697b7600dbaSDavid Woodhouse 698b7600dbaSDavid Woodhouse JFFS2_WARNING("Not enough space for summary, padsize = %d\n", 699b7600dbaSDavid Woodhouse padsize); 700b7600dbaSDavid Woodhouse /* Non-fatal */ 701b7600dbaSDavid Woodhouse return 0; 702b7600dbaSDavid Woodhouse } 703b7600dbaSDavid Woodhouse 704e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize); 705e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum)); 706e631ddbaSFerenc Havasi 707e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 708e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 709e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize); 710e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 711e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded); 712e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 713e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num); 714e631ddbaSFerenc Havasi wpage = c->summary->sum_buf; 715e631ddbaSFerenc Havasi 716e631ddbaSFerenc Havasi while (c->summary->sum_num) { 71720ffdcb0SJesper Juhl temp = c->summary->sum_list_head; 718e631ddbaSFerenc Havasi 71920ffdcb0SJesper Juhl switch (je16_to_cpu(temp->u.nodetype)) { 720e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 721e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage; 722e631ddbaSFerenc Havasi 72320ffdcb0SJesper Juhl sino_ptr->nodetype = temp->i.nodetype; 72420ffdcb0SJesper Juhl sino_ptr->inode = temp->i.inode; 72520ffdcb0SJesper Juhl sino_ptr->version = temp->i.version; 72620ffdcb0SJesper Juhl sino_ptr->offset = temp->i.offset; 72720ffdcb0SJesper Juhl sino_ptr->totlen = temp->i.totlen; 728e631ddbaSFerenc Havasi 729e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE; 730e631ddbaSFerenc Havasi 731e631ddbaSFerenc Havasi break; 732e631ddbaSFerenc Havasi } 733e631ddbaSFerenc Havasi 734e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 735e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 736e631ddbaSFerenc Havasi 73720ffdcb0SJesper Juhl sdrnt_ptr->nodetype = temp->d.nodetype; 73820ffdcb0SJesper Juhl sdrnt_ptr->totlen = temp->d.totlen; 73920ffdcb0SJesper Juhl sdrnt_ptr->offset = temp->d.offset; 74020ffdcb0SJesper Juhl sdrnt_ptr->pino = temp->d.pino; 74120ffdcb0SJesper Juhl sdrnt_ptr->version = temp->d.version; 74220ffdcb0SJesper Juhl sdrnt_ptr->ino = temp->d.ino; 74320ffdcb0SJesper Juhl sdrnt_ptr->nsize = temp->d.nsize; 74420ffdcb0SJesper Juhl sdrnt_ptr->type = temp->d.type; 745e631ddbaSFerenc Havasi 74620ffdcb0SJesper Juhl memcpy(sdrnt_ptr->name, temp->d.name, 74720ffdcb0SJesper Juhl temp->d.nsize); 748e631ddbaSFerenc Havasi 74920ffdcb0SJesper Juhl wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); 750e631ddbaSFerenc Havasi 751e631ddbaSFerenc Havasi break; 752e631ddbaSFerenc Havasi } 753aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 754aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 755aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; 756e631ddbaSFerenc Havasi 757aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 758aa98d7cfSKaiGai Kohei sxattr_ptr->nodetype = temp->x.nodetype; 759aa98d7cfSKaiGai Kohei sxattr_ptr->xid = temp->x.xid; 760aa98d7cfSKaiGai Kohei sxattr_ptr->version = temp->x.version; 761aa98d7cfSKaiGai Kohei sxattr_ptr->offset = temp->x.offset; 762aa98d7cfSKaiGai Kohei sxattr_ptr->totlen = temp->x.totlen; 763aa98d7cfSKaiGai Kohei 764aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XATTR_SIZE; 765aa98d7cfSKaiGai Kohei break; 766aa98d7cfSKaiGai Kohei } 767aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 768aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *sxref_ptr = wpage; 769aa98d7cfSKaiGai Kohei 770aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 771aa98d7cfSKaiGai Kohei sxref_ptr->nodetype = temp->r.nodetype; 772aa98d7cfSKaiGai Kohei sxref_ptr->offset = temp->r.offset; 773aa98d7cfSKaiGai Kohei 774aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XREF_SIZE; 775aa98d7cfSKaiGai Kohei break; 776aa98d7cfSKaiGai Kohei } 777aa98d7cfSKaiGai Kohei #endif 778e631ddbaSFerenc Havasi default : { 7796171586aSDavid Woodhouse if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) 7806171586aSDavid Woodhouse == JFFS2_FEATURE_RWCOMPAT_COPY) { 7816171586aSDavid Woodhouse dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", 7826171586aSDavid Woodhouse je16_to_cpu(temp->u.nodetype)); 7836171586aSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 7846171586aSDavid Woodhouse } else { 785e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */ 786e631ddbaSFerenc Havasi } 787e631ddbaSFerenc Havasi } 7886171586aSDavid Woodhouse } 789e631ddbaSFerenc Havasi 79020ffdcb0SJesper Juhl c->summary->sum_list_head = temp->u.next; 791e631ddbaSFerenc Havasi kfree(temp); 792e631ddbaSFerenc Havasi 793e631ddbaSFerenc Havasi c->summary->sum_num--; 794e631ddbaSFerenc Havasi } 795e631ddbaSFerenc Havasi 796e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary); 797e631ddbaSFerenc Havasi 798e631ddbaSFerenc Havasi wpage += padsize; 799e631ddbaSFerenc Havasi 800e631ddbaSFerenc Havasi sm = wpage; 801e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 802e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 803e631ddbaSFerenc Havasi 804e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 805e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 806e631ddbaSFerenc Havasi 807e631ddbaSFerenc Havasi vecs[0].iov_base = &isum; 808e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum); 809e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf; 810e631ddbaSFerenc Havasi vecs[1].iov_len = datasize; 811e631ddbaSFerenc Havasi 8122f785402SDavid Woodhouse sum_ofs = jeb->offset + c->sector_size - jeb->free_size; 813e631ddbaSFerenc Havasi 8142f785402SDavid Woodhouse dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", 8152f785402SDavid Woodhouse sum_ofs); 8162f785402SDavid Woodhouse 8172f785402SDavid Woodhouse ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); 818e631ddbaSFerenc Havasi 819e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) { 820010b06d6SDavid Woodhouse 821c41ff6e5SDavid Woodhouse JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", 8222f785402SDavid Woodhouse infosize, sum_ofs, ret, retlen); 823e631ddbaSFerenc Havasi 8249bfeb691SDavid Woodhouse if (retlen) { 825010b06d6SDavid Woodhouse /* Waste remaining space */ 826010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8272f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); 8282f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8299bfeb691SDavid Woodhouse } 830010b06d6SDavid Woodhouse 831e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 832e631ddbaSFerenc Havasi 8332f785402SDavid Woodhouse return 0; 834e631ddbaSFerenc Havasi } 835e631ddbaSFerenc Havasi 836010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8372f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); 8382f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 839010b06d6SDavid Woodhouse 840e631ddbaSFerenc Havasi return 0; 841e631ddbaSFerenc Havasi } 842e631ddbaSFerenc Havasi 843e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */ 844e631ddbaSFerenc Havasi 845e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 846e631ddbaSFerenc Havasi { 8472f785402SDavid Woodhouse int datasize, infosize, padsize; 848e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 849b7600dbaSDavid Woodhouse int ret = 0; 850e631ddbaSFerenc Havasi 851733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 852e631ddbaSFerenc Havasi 8532f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8542f785402SDavid Woodhouse 855e631ddbaSFerenc Havasi jeb = c->nextblock; 856046b8b98SDavid Woodhouse jffs2_prealloc_raw_node_refs(c, jeb, 1); 857e631ddbaSFerenc Havasi 858e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) { 859e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n"); 860e631ddbaSFerenc Havasi BUG(); 861e631ddbaSFerenc Havasi } 862e631ddbaSFerenc Havasi 863e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 8642bc9764cSFerenc Havasi infosize = sizeof(struct jffs2_raw_summary) + datasize; 865e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize; 866e631ddbaSFerenc Havasi infosize += padsize; 867e631ddbaSFerenc Havasi datasize += padsize; 868e631ddbaSFerenc Havasi 869e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 870010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8712f785402SDavid Woodhouse return ret; 872e631ddbaSFerenc Havasi } 873