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 { 263d375d9eSYan Burman c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); 27e631ddbaSFerenc Havasi 28e631ddbaSFerenc Havasi if (!c->summary) { 29e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate memory for summary information!\n"); 30e631ddbaSFerenc Havasi return -ENOMEM; 31e631ddbaSFerenc Havasi } 32e631ddbaSFerenc Havasi 33e631ddbaSFerenc Havasi c->summary->sum_buf = vmalloc(c->sector_size); 34e631ddbaSFerenc Havasi 35e631ddbaSFerenc Havasi if (!c->summary->sum_buf) { 36e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 37733802d9SArtem B. Bityutskiy kfree(c->summary); 38e631ddbaSFerenc Havasi return -ENOMEM; 39e631ddbaSFerenc Havasi } 40e631ddbaSFerenc Havasi 41d6e05edcSAndreas Mohr dbg_summary("returned successfully\n"); 42e631ddbaSFerenc Havasi 43e631ddbaSFerenc Havasi return 0; 44e631ddbaSFerenc Havasi } 45e631ddbaSFerenc Havasi 46e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c) 47e631ddbaSFerenc Havasi { 48733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 49e631ddbaSFerenc Havasi 50e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 51e631ddbaSFerenc Havasi 52e631ddbaSFerenc Havasi vfree(c->summary->sum_buf); 53e631ddbaSFerenc Havasi c->summary->sum_buf = NULL; 54e631ddbaSFerenc Havasi 55e631ddbaSFerenc Havasi kfree(c->summary); 56e631ddbaSFerenc Havasi c->summary = NULL; 57e631ddbaSFerenc Havasi } 58e631ddbaSFerenc Havasi 59e631ddbaSFerenc Havasi static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) 60e631ddbaSFerenc Havasi { 61e631ddbaSFerenc Havasi if (!s->sum_list_head) 62e631ddbaSFerenc Havasi s->sum_list_head = (union jffs2_sum_mem *) item; 63e631ddbaSFerenc Havasi if (s->sum_list_tail) 64e631ddbaSFerenc Havasi s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; 65e631ddbaSFerenc Havasi s->sum_list_tail = (union jffs2_sum_mem *) item; 66e631ddbaSFerenc Havasi 67e631ddbaSFerenc Havasi switch (je16_to_cpu(item->u.nodetype)) { 68e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: 69e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_INODE_SIZE; 70e631ddbaSFerenc Havasi s->sum_num++; 71733802d9SArtem B. Bityutskiy dbg_summary("inode (%u) added to summary\n", 72e631ddbaSFerenc Havasi je32_to_cpu(item->i.inode)); 73e631ddbaSFerenc Havasi break; 74e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: 75e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); 76e631ddbaSFerenc Havasi s->sum_num++; 77733802d9SArtem B. Bityutskiy dbg_summary("dirent (%u) added to summary\n", 78e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino)); 79e631ddbaSFerenc Havasi break; 80aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 81aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: 82aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; 83aa98d7cfSKaiGai Kohei s->sum_num++; 84aa98d7cfSKaiGai Kohei dbg_summary("xattr (xid=%u, version=%u) added to summary\n", 85aa98d7cfSKaiGai Kohei je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); 86aa98d7cfSKaiGai Kohei break; 87aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: 88aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XREF_SIZE; 89aa98d7cfSKaiGai Kohei s->sum_num++; 90aa98d7cfSKaiGai Kohei dbg_summary("xref added to summary\n"); 91aa98d7cfSKaiGai Kohei break; 92aa98d7cfSKaiGai Kohei #endif 93e631ddbaSFerenc Havasi default: 94e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n", 95e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype)); 96e631ddbaSFerenc Havasi return 1; 97e631ddbaSFerenc Havasi } 98e631ddbaSFerenc Havasi return 0; 99e631ddbaSFerenc Havasi } 100e631ddbaSFerenc Havasi 101e631ddbaSFerenc Havasi 102e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 103e631ddbaSFerenc Havasi 104e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 105e631ddbaSFerenc Havasi { 106733802d9SArtem B. Bityutskiy dbg_summary("called with %u\n", size); 107e631ddbaSFerenc Havasi s->sum_padded += size; 108e631ddbaSFerenc Havasi return 0; 109e631ddbaSFerenc Havasi } 110e631ddbaSFerenc Havasi 111e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 112e631ddbaSFerenc Havasi uint32_t ofs) 113e631ddbaSFerenc Havasi { 114e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 115e631ddbaSFerenc Havasi 116e631ddbaSFerenc Havasi if (!temp) 117e631ddbaSFerenc Havasi return -ENOMEM; 118e631ddbaSFerenc Havasi 119e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype; 120e631ddbaSFerenc Havasi temp->inode = ri->ino; 121e631ddbaSFerenc Havasi temp->version = ri->version; 122e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ 123e631ddbaSFerenc Havasi temp->totlen = ri->totlen; 124e631ddbaSFerenc Havasi temp->next = NULL; 125e631ddbaSFerenc Havasi 126e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 127e631ddbaSFerenc Havasi } 128e631ddbaSFerenc Havasi 129e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 130e631ddbaSFerenc Havasi uint32_t ofs) 131e631ddbaSFerenc Havasi { 132e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 133e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 134e631ddbaSFerenc Havasi 135e631ddbaSFerenc Havasi if (!temp) 136e631ddbaSFerenc Havasi return -ENOMEM; 137e631ddbaSFerenc Havasi 138e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype; 139e631ddbaSFerenc Havasi temp->totlen = rd->totlen; 140e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ 141e631ddbaSFerenc Havasi temp->pino = rd->pino; 142e631ddbaSFerenc Havasi temp->version = rd->version; 143e631ddbaSFerenc Havasi temp->ino = rd->ino; 144e631ddbaSFerenc Havasi temp->nsize = rd->nsize; 145e631ddbaSFerenc Havasi temp->type = rd->type; 146e631ddbaSFerenc Havasi temp->next = NULL; 147e631ddbaSFerenc Havasi 148e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize); 149e631ddbaSFerenc Havasi 150e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 151e631ddbaSFerenc Havasi } 152e631ddbaSFerenc Havasi 153aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 154aa98d7cfSKaiGai Kohei int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) 155aa98d7cfSKaiGai Kohei { 156aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 157aa98d7cfSKaiGai Kohei 158aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 159aa98d7cfSKaiGai Kohei if (!temp) 160aa98d7cfSKaiGai Kohei return -ENOMEM; 161aa98d7cfSKaiGai Kohei 162aa98d7cfSKaiGai Kohei temp->nodetype = rx->nodetype; 163aa98d7cfSKaiGai Kohei temp->xid = rx->xid; 164aa98d7cfSKaiGai Kohei temp->version = rx->version; 165aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 166aa98d7cfSKaiGai Kohei temp->totlen = rx->totlen; 167aa98d7cfSKaiGai Kohei temp->next = NULL; 168aa98d7cfSKaiGai Kohei 169aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 170aa98d7cfSKaiGai Kohei } 171aa98d7cfSKaiGai Kohei 172aa98d7cfSKaiGai Kohei int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) 173aa98d7cfSKaiGai Kohei { 174aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 175aa98d7cfSKaiGai Kohei 176aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 177aa98d7cfSKaiGai Kohei if (!temp) 178aa98d7cfSKaiGai Kohei return -ENOMEM; 179aa98d7cfSKaiGai Kohei 180aa98d7cfSKaiGai Kohei temp->nodetype = rr->nodetype; 181aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 182aa98d7cfSKaiGai Kohei temp->next = NULL; 183aa98d7cfSKaiGai Kohei 184aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 185aa98d7cfSKaiGai Kohei } 186aa98d7cfSKaiGai Kohei #endif 187e631ddbaSFerenc Havasi /* Cleanup every collected summary information */ 188e631ddbaSFerenc Havasi 189e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s) 190e631ddbaSFerenc Havasi { 191e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 192e631ddbaSFerenc Havasi 193e631ddbaSFerenc Havasi if (!s->sum_list_head) { 194733802d9SArtem B. Bityutskiy dbg_summary("already empty\n"); 195e631ddbaSFerenc Havasi } 196e631ddbaSFerenc Havasi while (s->sum_list_head) { 197e631ddbaSFerenc Havasi temp = s->sum_list_head; 198e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next; 199e631ddbaSFerenc Havasi kfree(temp); 200e631ddbaSFerenc Havasi } 201e631ddbaSFerenc Havasi s->sum_list_tail = NULL; 202e631ddbaSFerenc Havasi s->sum_padded = 0; 203e631ddbaSFerenc Havasi s->sum_num = 0; 204e631ddbaSFerenc Havasi } 205e631ddbaSFerenc Havasi 206e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s) 207e631ddbaSFerenc Havasi { 208733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 209e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 210e631ddbaSFerenc Havasi s->sum_size = 0; 211e631ddbaSFerenc Havasi } 212e631ddbaSFerenc Havasi 213e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s) 214e631ddbaSFerenc Havasi { 215733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 216e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 217e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 218e631ddbaSFerenc Havasi } 219e631ddbaSFerenc Havasi 220e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s) 221e631ddbaSFerenc Havasi { 222e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 223e631ddbaSFerenc Havasi } 224e631ddbaSFerenc Havasi 225e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */ 226e631ddbaSFerenc Havasi 227e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 228e631ddbaSFerenc Havasi { 229733802d9SArtem B. Bityutskiy dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 230e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num, 231e631ddbaSFerenc Havasi s->sum_size, s->sum_num); 232e631ddbaSFerenc Havasi 233e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size; 234e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num; 235e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded; 236e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head; 237e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail; 238e631ddbaSFerenc Havasi 239e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL; 240e631ddbaSFerenc Havasi } 241e631ddbaSFerenc Havasi 242e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */ 243e631ddbaSFerenc Havasi 244e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 245e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs) 246e631ddbaSFerenc Havasi { 247e631ddbaSFerenc Havasi union jffs2_node_union *node; 248e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 249e631ddbaSFerenc Havasi 25027bea327SZoltan Sogor if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { 25127bea327SZoltan Sogor dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n"); 25227bea327SZoltan Sogor return 0; 25327bea327SZoltan Sogor } 25427bea327SZoltan Sogor 255e631ddbaSFerenc Havasi node = invecs[0].iov_base; 256e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size]; 257e631ddbaSFerenc Havasi ofs -= jeb->offset; 258e631ddbaSFerenc Havasi 259e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) { 260e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 261e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = 262e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 263e631ddbaSFerenc Havasi 264e631ddbaSFerenc Havasi if (!temp) 265e631ddbaSFerenc Havasi goto no_mem; 266e631ddbaSFerenc Havasi 267e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype; 268e631ddbaSFerenc Havasi temp->inode = node->i.ino; 269e631ddbaSFerenc Havasi temp->version = node->i.version; 270e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 271e631ddbaSFerenc Havasi temp->totlen = node->i.totlen; 272e631ddbaSFerenc Havasi temp->next = NULL; 273e631ddbaSFerenc Havasi 274e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 275e631ddbaSFerenc Havasi } 276e631ddbaSFerenc Havasi 277e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 278e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 279e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 280e631ddbaSFerenc Havasi 281e631ddbaSFerenc Havasi if (!temp) 282e631ddbaSFerenc Havasi goto no_mem; 283e631ddbaSFerenc Havasi 284e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype; 285e631ddbaSFerenc Havasi temp->totlen = node->d.totlen; 286e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 287e631ddbaSFerenc Havasi temp->pino = node->d.pino; 288e631ddbaSFerenc Havasi temp->version = node->d.version; 289e631ddbaSFerenc Havasi temp->ino = node->d.ino; 290e631ddbaSFerenc Havasi temp->nsize = node->d.nsize; 291e631ddbaSFerenc Havasi temp->type = node->d.type; 292e631ddbaSFerenc Havasi temp->next = NULL; 293e631ddbaSFerenc Havasi 294e631ddbaSFerenc Havasi switch (count) { 295e631ddbaSFerenc Havasi case 1: 296e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize); 297e631ddbaSFerenc Havasi break; 298e631ddbaSFerenc Havasi 299e631ddbaSFerenc Havasi case 2: 300e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 301e631ddbaSFerenc Havasi break; 302e631ddbaSFerenc Havasi 303e631ddbaSFerenc Havasi default: 304e631ddbaSFerenc Havasi BUG(); /* impossible count value */ 305e631ddbaSFerenc Havasi break; 306e631ddbaSFerenc Havasi } 307e631ddbaSFerenc Havasi 308e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 309e631ddbaSFerenc Havasi } 310aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 311aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 312aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 313aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 314aa98d7cfSKaiGai Kohei if (!temp) 315aa98d7cfSKaiGai Kohei goto no_mem; 316e631ddbaSFerenc Havasi 317aa98d7cfSKaiGai Kohei temp->nodetype = node->x.nodetype; 318aa98d7cfSKaiGai Kohei temp->xid = node->x.xid; 319aa98d7cfSKaiGai Kohei temp->version = node->x.version; 320aa98d7cfSKaiGai Kohei temp->totlen = node->x.totlen; 321aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 322aa98d7cfSKaiGai Kohei temp->next = NULL; 323aa98d7cfSKaiGai Kohei 324aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 325aa98d7cfSKaiGai Kohei } 326aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 327aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 328aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 329aa98d7cfSKaiGai Kohei if (!temp) 330aa98d7cfSKaiGai Kohei goto no_mem; 331aa98d7cfSKaiGai Kohei temp->nodetype = node->r.nodetype; 332aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 333aa98d7cfSKaiGai Kohei temp->next = NULL; 334aa98d7cfSKaiGai Kohei 335aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 336aa98d7cfSKaiGai Kohei } 337aa98d7cfSKaiGai Kohei #endif 338e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING: 339733802d9SArtem B. Bityutskiy dbg_summary("node PADDING\n"); 340e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen); 341e631ddbaSFerenc Havasi break; 342e631ddbaSFerenc Havasi 343e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER: 344733802d9SArtem B. Bityutskiy dbg_summary("node CLEANMARKER\n"); 345e631ddbaSFerenc Havasi break; 346e631ddbaSFerenc Havasi 347e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY: 348733802d9SArtem B. Bityutskiy dbg_summary("node SUMMARY\n"); 349e631ddbaSFerenc Havasi break; 350e631ddbaSFerenc Havasi 351e631ddbaSFerenc Havasi default: 352e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement 353e631ddbaSFerenc Havasi summary support for it or disable summary. 354e631ddbaSFerenc Havasi */ 355e631ddbaSFerenc Havasi BUG(); 356e631ddbaSFerenc Havasi break; 357e631ddbaSFerenc Havasi } 358e631ddbaSFerenc Havasi 359e631ddbaSFerenc Havasi return 0; 360e631ddbaSFerenc Havasi 361e631ddbaSFerenc Havasi no_mem: 362e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 363e631ddbaSFerenc Havasi return -ENOMEM; 364e631ddbaSFerenc Havasi } 365e631ddbaSFerenc Havasi 3662f785402SDavid Woodhouse static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, 3672f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3682f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 3692f785402SDavid Woodhouse struct jffs2_inode_cache *ic) 37049f11d40SDavid Woodhouse { 37149f11d40SDavid Woodhouse /* If there was a gap, mark it dirty */ 3722f785402SDavid Woodhouse if ((ofs & ~3) > c->sector_size - jeb->free_size) { 3732f785402SDavid Woodhouse /* Ew. Summary doesn't actually tell us explicitly about dirty space */ 3742f785402SDavid Woodhouse jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); 37549f11d40SDavid Woodhouse } 37649f11d40SDavid Woodhouse 3772f785402SDavid Woodhouse return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); 37849f11d40SDavid Woodhouse } 379e631ddbaSFerenc Havasi 380e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 381e631ddbaSFerenc Havasi 382e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 3832bc9764cSFerenc Havasi struct jffs2_raw_summary *summary, uint32_t *pseudo_random) 384e631ddbaSFerenc Havasi { 385e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic; 386e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd; 387e631ddbaSFerenc Havasi void *sp; 388e631ddbaSFerenc Havasi int i, ino; 38968270995SDavid Woodhouse int err; 390e631ddbaSFerenc Havasi 391e631ddbaSFerenc Havasi sp = summary->sum; 392e631ddbaSFerenc Havasi 393e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 394733802d9SArtem B. Bityutskiy dbg_summary("processing summary index %d\n", i); 395e631ddbaSFerenc Havasi 396a2166b93SArtem Bityutskiy cond_resched(); 397a2166b93SArtem Bityutskiy 3982f785402SDavid Woodhouse /* Make sure there's a spare ref for dirty space */ 399046b8b98SDavid Woodhouse err = jffs2_prealloc_raw_node_refs(c, jeb, 2); 4002f785402SDavid Woodhouse if (err) 4012f785402SDavid Woodhouse return err; 4022f785402SDavid Woodhouse 403e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 404e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 405e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi; 406e631ddbaSFerenc Havasi spi = sp; 407e631ddbaSFerenc Havasi 408e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode); 409e631ddbaSFerenc Havasi 4109167e0f8SDavid Woodhouse dbg_summary("Inode at 0x%08x-0x%08x\n", 4119167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset), 4128b9e9fe8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); 413e631ddbaSFerenc Havasi 414e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino); 415e631ddbaSFerenc Havasi if (!ic) { 416e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n"); 417e631ddbaSFerenc Havasi return -ENOMEM; 418e631ddbaSFerenc Havasi } 419e631ddbaSFerenc Havasi 4202f785402SDavid Woodhouse sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, 4212f785402SDavid Woodhouse PAD(je32_to_cpu(spi->totlen)), ic); 422f1f9671bSDavid Woodhouse 423f1f9671bSDavid Woodhouse *pseudo_random += je32_to_cpu(spi->version); 424e631ddbaSFerenc Havasi 425e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE; 426e631ddbaSFerenc Havasi 427e631ddbaSFerenc Havasi break; 428e631ddbaSFerenc Havasi } 429e631ddbaSFerenc Havasi 430e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 431e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd; 432b534e70cSDavid Woodhouse int checkedlen; 433e631ddbaSFerenc Havasi spd = sp; 434e631ddbaSFerenc Havasi 4358b9e9fe8SDavid Woodhouse dbg_summary("Dirent at 0x%08x-0x%08x\n", 4369167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset), 4379167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); 4389167e0f8SDavid Woodhouse 439e631ddbaSFerenc Havasi 440b534e70cSDavid Woodhouse /* This should never happen, but https://dev.laptop.org/ticket/4184 */ 441b534e70cSDavid Woodhouse checkedlen = strnlen(spd->name, spd->nsize); 442b534e70cSDavid Woodhouse if (!checkedlen) { 443b534e70cSDavid Woodhouse printk(KERN_ERR "Dirent at %08x has zero at start of name. Aborting mount.\n", 444b534e70cSDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset)); 445b534e70cSDavid Woodhouse return -EIO; 446b534e70cSDavid Woodhouse } 447b534e70cSDavid Woodhouse if (checkedlen < spd->nsize) { 448b534e70cSDavid Woodhouse printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars\n", 449b534e70cSDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset), checkedlen); 450b534e70cSDavid Woodhouse } 451b534e70cSDavid Woodhouse 452b534e70cSDavid Woodhouse 453b534e70cSDavid Woodhouse fd = jffs2_alloc_full_dirent(checkedlen+1); 4549641b784SDavid Woodhouse if (!fd) 455e631ddbaSFerenc Havasi return -ENOMEM; 456e631ddbaSFerenc Havasi 457b534e70cSDavid Woodhouse memcpy(&fd->name, spd->name, checkedlen); 458b534e70cSDavid Woodhouse fd->name[checkedlen] = 0; 459e631ddbaSFerenc Havasi 460e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 461e631ddbaSFerenc Havasi if (!ic) { 462e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 463e631ddbaSFerenc Havasi return -ENOMEM; 464e631ddbaSFerenc Havasi } 465e631ddbaSFerenc Havasi 4661046d880SDavid Woodhouse fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, 4672f785402SDavid Woodhouse PAD(je32_to_cpu(spd->totlen)), ic); 468e631ddbaSFerenc Havasi 469e631ddbaSFerenc Havasi fd->next = NULL; 470e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version); 471e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino); 472b534e70cSDavid Woodhouse fd->nhash = full_name_hash(fd->name, checkedlen); 473e631ddbaSFerenc Havasi fd->type = spd->type; 474f1f9671bSDavid Woodhouse 475e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 476e631ddbaSFerenc Havasi 477e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version); 478e631ddbaSFerenc Havasi 479e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 480e631ddbaSFerenc Havasi 481e631ddbaSFerenc Havasi break; 482e631ddbaSFerenc Havasi } 483aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 484aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 485aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 486aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *spx; 487e631ddbaSFerenc Havasi 488aa98d7cfSKaiGai Kohei spx = (struct jffs2_sum_xattr_flash *)sp; 4899167e0f8SDavid Woodhouse dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 49049f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset), 4919167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), 492aa98d7cfSKaiGai Kohei je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); 4932f785402SDavid Woodhouse 494aa98d7cfSKaiGai Kohei xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), 495aa98d7cfSKaiGai Kohei je32_to_cpu(spx->version)); 496c9f700f8SKaiGai Kohei if (IS_ERR(xd)) 497aa98d7cfSKaiGai Kohei return PTR_ERR(xd); 498c9f700f8SKaiGai Kohei if (xd->version > je32_to_cpu(spx->version)) { 499c9f700f8SKaiGai Kohei /* node is not the newest one */ 500c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw 501c9f700f8SKaiGai Kohei = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 5022f785402SDavid Woodhouse PAD(je32_to_cpu(spx->totlen)), NULL); 503c9f700f8SKaiGai Kohei raw->next_in_ino = xd->node->next_in_ino; 504c9f700f8SKaiGai Kohei xd->node->next_in_ino = raw; 505c9f700f8SKaiGai Kohei } else { 506c9f700f8SKaiGai Kohei xd->version = je32_to_cpu(spx->version); 507c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 508c9f700f8SKaiGai Kohei PAD(je32_to_cpu(spx->totlen)), (void *)xd); 509c9f700f8SKaiGai Kohei } 510aa98d7cfSKaiGai Kohei *pseudo_random += je32_to_cpu(spx->xid); 511aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XATTR_SIZE; 512aa98d7cfSKaiGai Kohei 513aa98d7cfSKaiGai Kohei break; 514aa98d7cfSKaiGai Kohei } 515aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 516aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 517aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *spr; 518aa98d7cfSKaiGai Kohei 519aa98d7cfSKaiGai Kohei spr = (struct jffs2_sum_xref_flash *)sp; 5209167e0f8SDavid Woodhouse dbg_summary("xref at %#08x-%#08x\n", 52149f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset), 5229bfeb691SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset) + 5239bfeb691SDavid Woodhouse (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); 5249167e0f8SDavid Woodhouse 525aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 526aa98d7cfSKaiGai Kohei if (!ref) { 527aa98d7cfSKaiGai Kohei JFFS2_NOTICE("allocation of xattr_datum failed\n"); 528aa98d7cfSKaiGai Kohei return -ENOMEM; 529aa98d7cfSKaiGai Kohei } 5308f2b6f49SKaiGai Kohei ref->next = c->xref_temp; 5318f2b6f49SKaiGai Kohei c->xref_temp = ref; 532aa98d7cfSKaiGai Kohei 533c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, 534c9f700f8SKaiGai Kohei PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); 535aa98d7cfSKaiGai Kohei 5362f785402SDavid Woodhouse *pseudo_random += ref->node->flash_offset; 537aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XREF_SIZE; 538aa98d7cfSKaiGai Kohei 539aa98d7cfSKaiGai Kohei break; 540aa98d7cfSKaiGai Kohei } 541aa98d7cfSKaiGai Kohei #endif 542e631ddbaSFerenc Havasi default : { 5437807ef7bSDavid Woodhouse uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); 5447807ef7bSDavid Woodhouse JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); 5457807ef7bSDavid Woodhouse if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) 546e631ddbaSFerenc Havasi return -EIO; 5477807ef7bSDavid Woodhouse 5487807ef7bSDavid Woodhouse /* For compatible node types, just fall back to the full scan */ 5497807ef7bSDavid Woodhouse c->wasted_size -= jeb->wasted_size; 5507807ef7bSDavid Woodhouse c->free_size += c->sector_size - jeb->free_size; 5517807ef7bSDavid Woodhouse c->used_size -= jeb->used_size; 5527807ef7bSDavid Woodhouse c->dirty_size -= jeb->dirty_size; 5537807ef7bSDavid Woodhouse jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; 5547807ef7bSDavid Woodhouse jeb->free_size = c->sector_size; 5557807ef7bSDavid Woodhouse 556c38c1b61SDavid Woodhouse jffs2_free_jeb_node_refs(c, jeb); 5577807ef7bSDavid Woodhouse return -ENOTRECOVERABLE; 558e631ddbaSFerenc Havasi } 559e631ddbaSFerenc Havasi } 560e631ddbaSFerenc Havasi } 561e631ddbaSFerenc Havasi return 0; 562e631ddbaSFerenc Havasi } 563e631ddbaSFerenc Havasi 564e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */ 565e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 5669641b784SDavid Woodhouse struct jffs2_raw_summary *summary, uint32_t sumsize, 5679641b784SDavid Woodhouse uint32_t *pseudo_random) 568e631ddbaSFerenc Havasi { 569e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode; 5709641b784SDavid Woodhouse int ret, ofs; 571e631ddbaSFerenc Havasi uint32_t crc; 572e631ddbaSFerenc Havasi 57349f11d40SDavid Woodhouse ofs = c->sector_size - sumsize; 574e631ddbaSFerenc Havasi 575733802d9SArtem B. Bityutskiy dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 57649f11d40SDavid Woodhouse jeb->offset, jeb->offset + ofs, sumsize); 577e631ddbaSFerenc Havasi 578e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */ 579e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 580e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 581e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen; 582e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4); 583e631ddbaSFerenc Havasi 584e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) { 585733802d9SArtem B. Bityutskiy dbg_summary("Summary node header is corrupt (bad CRC or " 586e631ddbaSFerenc Havasi "no summary at all)\n"); 587e631ddbaSFerenc Havasi goto crc_err; 588e631ddbaSFerenc Havasi } 589e631ddbaSFerenc Havasi 590e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) { 591733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); 592e631ddbaSFerenc Havasi goto crc_err; 593e631ddbaSFerenc Havasi } 594e631ddbaSFerenc Havasi 5952bc9764cSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); 596e631ddbaSFerenc Havasi 597e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) { 598733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (bad CRC)\n"); 599e631ddbaSFerenc Havasi goto crc_err; 600e631ddbaSFerenc Havasi } 601e631ddbaSFerenc Havasi 6022bc9764cSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); 603e631ddbaSFerenc Havasi 604e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) { 605733802d9SArtem B. Bityutskiy dbg_summary("Summary node data is corrupt (bad CRC)\n"); 606e631ddbaSFerenc Havasi goto crc_err; 607e631ddbaSFerenc Havasi } 608e631ddbaSFerenc Havasi 609e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) { 610e631ddbaSFerenc Havasi 611733802d9SArtem B. Bityutskiy dbg_summary("Summary : CLEANMARKER node \n"); 612e631ddbaSFerenc Havasi 613098a1981SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); 614098a1981SDavid Woodhouse if (ret) 615098a1981SDavid Woodhouse return ret; 616098a1981SDavid Woodhouse 617e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 618733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 619e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 620098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 621098a1981SDavid Woodhouse return ret; 622e631ddbaSFerenc Havasi } else if (jeb->first_node) { 623733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node not first node in block " 624e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset); 625098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 626098a1981SDavid Woodhouse return ret; 627e631ddbaSFerenc Havasi } else { 6282f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, 6292f785402SDavid Woodhouse je32_to_cpu(summary->cln_mkr), NULL); 630e631ddbaSFerenc Havasi } 631e631ddbaSFerenc Havasi } 632e631ddbaSFerenc Havasi 633e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 6347807ef7bSDavid Woodhouse /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full 6357807ef7bSDavid Woodhouse scan of this eraseblock. So return zero */ 6367807ef7bSDavid Woodhouse if (ret == -ENOTRECOVERABLE) 6377807ef7bSDavid Woodhouse return 0; 638e631ddbaSFerenc Havasi if (ret) 6397807ef7bSDavid Woodhouse return ret; /* real error */ 640e631ddbaSFerenc Havasi 641e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */ 642046b8b98SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); 6432f785402SDavid Woodhouse if (ret) 6442f785402SDavid Woodhouse return ret; 645e631ddbaSFerenc Havasi 646f61579c3SDavid Woodhouse sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); 647e631ddbaSFerenc Havasi 64849f11d40SDavid Woodhouse if (unlikely(jeb->free_size)) { 64949f11d40SDavid Woodhouse JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", 65049f11d40SDavid Woodhouse jeb->free_size, jeb->offset); 651e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size; 652e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size; 653e631ddbaSFerenc Havasi c->free_size -= jeb->free_size; 654e631ddbaSFerenc Havasi jeb->free_size = 0; 65549f11d40SDavid Woodhouse } 656e631ddbaSFerenc Havasi 657e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb); 658e631ddbaSFerenc Havasi 659e631ddbaSFerenc Havasi crc_err: 660e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 661e631ddbaSFerenc Havasi 662e631ddbaSFerenc Havasi return 0; 663e631ddbaSFerenc Havasi } 664e631ddbaSFerenc Havasi 665e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 666e631ddbaSFerenc Havasi 667e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 668e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize) 669e631ddbaSFerenc Havasi { 6702bc9764cSFerenc Havasi struct jffs2_raw_summary isum; 671e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 672e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm; 673e631ddbaSFerenc Havasi struct kvec vecs[2]; 6742f785402SDavid Woodhouse uint32_t sum_ofs; 675e631ddbaSFerenc Havasi void *wpage; 676e631ddbaSFerenc Havasi int ret; 677e631ddbaSFerenc Havasi size_t retlen; 678e631ddbaSFerenc Havasi 679e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize); 680e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum)); 681e631ddbaSFerenc Havasi 682e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 683e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 684e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize); 685e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 686e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded); 687e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 688e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num); 689e631ddbaSFerenc Havasi wpage = c->summary->sum_buf; 690e631ddbaSFerenc Havasi 691e631ddbaSFerenc Havasi while (c->summary->sum_num) { 69220ffdcb0SJesper Juhl temp = c->summary->sum_list_head; 693e631ddbaSFerenc Havasi 69420ffdcb0SJesper Juhl switch (je16_to_cpu(temp->u.nodetype)) { 695e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 696e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage; 697e631ddbaSFerenc Havasi 69820ffdcb0SJesper Juhl sino_ptr->nodetype = temp->i.nodetype; 69920ffdcb0SJesper Juhl sino_ptr->inode = temp->i.inode; 70020ffdcb0SJesper Juhl sino_ptr->version = temp->i.version; 70120ffdcb0SJesper Juhl sino_ptr->offset = temp->i.offset; 70220ffdcb0SJesper Juhl sino_ptr->totlen = temp->i.totlen; 703e631ddbaSFerenc Havasi 704e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE; 705e631ddbaSFerenc Havasi 706e631ddbaSFerenc Havasi break; 707e631ddbaSFerenc Havasi } 708e631ddbaSFerenc Havasi 709e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 710e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 711e631ddbaSFerenc Havasi 71220ffdcb0SJesper Juhl sdrnt_ptr->nodetype = temp->d.nodetype; 71320ffdcb0SJesper Juhl sdrnt_ptr->totlen = temp->d.totlen; 71420ffdcb0SJesper Juhl sdrnt_ptr->offset = temp->d.offset; 71520ffdcb0SJesper Juhl sdrnt_ptr->pino = temp->d.pino; 71620ffdcb0SJesper Juhl sdrnt_ptr->version = temp->d.version; 71720ffdcb0SJesper Juhl sdrnt_ptr->ino = temp->d.ino; 71820ffdcb0SJesper Juhl sdrnt_ptr->nsize = temp->d.nsize; 71920ffdcb0SJesper Juhl sdrnt_ptr->type = temp->d.type; 720e631ddbaSFerenc Havasi 72120ffdcb0SJesper Juhl memcpy(sdrnt_ptr->name, temp->d.name, 72220ffdcb0SJesper Juhl temp->d.nsize); 723e631ddbaSFerenc Havasi 72420ffdcb0SJesper Juhl wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); 725e631ddbaSFerenc Havasi 726e631ddbaSFerenc Havasi break; 727e631ddbaSFerenc Havasi } 728aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 729aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 730aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; 731e631ddbaSFerenc Havasi 732aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 733aa98d7cfSKaiGai Kohei sxattr_ptr->nodetype = temp->x.nodetype; 734aa98d7cfSKaiGai Kohei sxattr_ptr->xid = temp->x.xid; 735aa98d7cfSKaiGai Kohei sxattr_ptr->version = temp->x.version; 736aa98d7cfSKaiGai Kohei sxattr_ptr->offset = temp->x.offset; 737aa98d7cfSKaiGai Kohei sxattr_ptr->totlen = temp->x.totlen; 738aa98d7cfSKaiGai Kohei 739aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XATTR_SIZE; 740aa98d7cfSKaiGai Kohei break; 741aa98d7cfSKaiGai Kohei } 742aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 743aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *sxref_ptr = wpage; 744aa98d7cfSKaiGai Kohei 745aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 746aa98d7cfSKaiGai Kohei sxref_ptr->nodetype = temp->r.nodetype; 747aa98d7cfSKaiGai Kohei sxref_ptr->offset = temp->r.offset; 748aa98d7cfSKaiGai Kohei 749aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XREF_SIZE; 750aa98d7cfSKaiGai Kohei break; 751aa98d7cfSKaiGai Kohei } 752aa98d7cfSKaiGai Kohei #endif 753e631ddbaSFerenc Havasi default : { 7546171586aSDavid Woodhouse if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) 7556171586aSDavid Woodhouse == JFFS2_FEATURE_RWCOMPAT_COPY) { 7566171586aSDavid Woodhouse dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", 7576171586aSDavid Woodhouse je16_to_cpu(temp->u.nodetype)); 7586171586aSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 7596171586aSDavid Woodhouse } else { 760e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */ 761e631ddbaSFerenc Havasi } 762e631ddbaSFerenc Havasi } 7636171586aSDavid Woodhouse } 764e631ddbaSFerenc Havasi 76520ffdcb0SJesper Juhl c->summary->sum_list_head = temp->u.next; 766e631ddbaSFerenc Havasi kfree(temp); 767e631ddbaSFerenc Havasi 768e631ddbaSFerenc Havasi c->summary->sum_num--; 769e631ddbaSFerenc Havasi } 770e631ddbaSFerenc Havasi 771e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary); 772e631ddbaSFerenc Havasi 773e631ddbaSFerenc Havasi wpage += padsize; 774e631ddbaSFerenc Havasi 775e631ddbaSFerenc Havasi sm = wpage; 776e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 777e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 778e631ddbaSFerenc Havasi 779e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 780e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 781e631ddbaSFerenc Havasi 782e631ddbaSFerenc Havasi vecs[0].iov_base = &isum; 783e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum); 784e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf; 785e631ddbaSFerenc Havasi vecs[1].iov_len = datasize; 786e631ddbaSFerenc Havasi 7872f785402SDavid Woodhouse sum_ofs = jeb->offset + c->sector_size - jeb->free_size; 788e631ddbaSFerenc Havasi 7892f785402SDavid Woodhouse dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", 7902f785402SDavid Woodhouse sum_ofs); 7912f785402SDavid Woodhouse 7922f785402SDavid Woodhouse ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); 793e631ddbaSFerenc Havasi 794e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) { 795010b06d6SDavid Woodhouse 796c41ff6e5SDavid Woodhouse JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", 7972f785402SDavid Woodhouse infosize, sum_ofs, ret, retlen); 798e631ddbaSFerenc Havasi 7999bfeb691SDavid Woodhouse if (retlen) { 800010b06d6SDavid Woodhouse /* Waste remaining space */ 801010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8022f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); 8032f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8049bfeb691SDavid Woodhouse } 805010b06d6SDavid Woodhouse 806e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 807e631ddbaSFerenc Havasi 8082f785402SDavid Woodhouse return 0; 809e631ddbaSFerenc Havasi } 810e631ddbaSFerenc Havasi 811010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8122f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); 8132f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 814010b06d6SDavid Woodhouse 815e631ddbaSFerenc Havasi return 0; 816e631ddbaSFerenc Havasi } 817e631ddbaSFerenc Havasi 818e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */ 819e631ddbaSFerenc Havasi 820e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 821e631ddbaSFerenc Havasi { 8222f785402SDavid Woodhouse int datasize, infosize, padsize; 823e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 8242f785402SDavid Woodhouse int ret; 825e631ddbaSFerenc Havasi 826733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 827e631ddbaSFerenc Havasi 8282f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8292f785402SDavid Woodhouse 830e631ddbaSFerenc Havasi jeb = c->nextblock; 831046b8b98SDavid Woodhouse jffs2_prealloc_raw_node_refs(c, jeb, 1); 832e631ddbaSFerenc Havasi 833e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) { 834e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n"); 835e631ddbaSFerenc Havasi BUG(); 836e631ddbaSFerenc Havasi } 837e631ddbaSFerenc Havasi 838e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 8392bc9764cSFerenc Havasi infosize = sizeof(struct jffs2_raw_summary) + datasize; 840e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize; 841e631ddbaSFerenc Havasi infosize += padsize; 842e631ddbaSFerenc Havasi datasize += padsize; 843e631ddbaSFerenc Havasi 844e631ddbaSFerenc Havasi /* Is there enough space for summary? */ 845e631ddbaSFerenc Havasi if (padsize < 0) { 846e631ddbaSFerenc Havasi /* don't try to write out summary for this jeb */ 847e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 848e631ddbaSFerenc Havasi 849e631ddbaSFerenc Havasi JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); 8509bfeb691SDavid Woodhouse spin_lock(&c->erase_completion_lock); 851e631ddbaSFerenc Havasi return 0; 852e631ddbaSFerenc Havasi } 853e631ddbaSFerenc Havasi 854e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 855010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8562f785402SDavid Woodhouse return ret; 857e631ddbaSFerenc Havasi } 858