1e631ddbaSFerenc Havasi /* 2e631ddbaSFerenc Havasi * JFFS2 -- Journalling Flash File System, Version 2. 3e631ddbaSFerenc Havasi * 4e631ddbaSFerenc Havasi * Copyright (C) 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 8e631ddbaSFerenc Havasi * 9e631ddbaSFerenc Havasi * For licensing information, see the file 'LICENCE' in this directory. 10e631ddbaSFerenc Havasi * 11e631ddbaSFerenc Havasi * $Id: summary.c,v 1.1 2005/09/07 08:34:54 havasi Exp $ 12e631ddbaSFerenc Havasi * 13e631ddbaSFerenc Havasi */ 14e631ddbaSFerenc Havasi 15e631ddbaSFerenc Havasi #include <linux/kernel.h> 16e631ddbaSFerenc Havasi #include <linux/sched.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 26e631ddbaSFerenc Havasi int jffs2_sum_init(struct jffs2_sb_info *c) 27e631ddbaSFerenc Havasi { 28e631ddbaSFerenc Havasi c->summary = kmalloc(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 35e631ddbaSFerenc Havasi memset(c->summary, 0, sizeof(struct jffs2_summary)); 36e631ddbaSFerenc Havasi 37e631ddbaSFerenc Havasi c->summary->sum_buf = vmalloc(c->sector_size); 38e631ddbaSFerenc Havasi 39e631ddbaSFerenc Havasi if (!c->summary->sum_buf) { 40e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 41e631ddbaSFerenc Havasi return -ENOMEM; 42e631ddbaSFerenc Havasi } 43e631ddbaSFerenc Havasi 44e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("returned succesfully\n"); 45e631ddbaSFerenc Havasi 46e631ddbaSFerenc Havasi return 0; 47e631ddbaSFerenc Havasi } 48e631ddbaSFerenc Havasi 49e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c) 50e631ddbaSFerenc Havasi { 51e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("called\n"); 52e631ddbaSFerenc Havasi 53e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 54e631ddbaSFerenc Havasi 55e631ddbaSFerenc Havasi vfree(c->summary->sum_buf); 56e631ddbaSFerenc Havasi c->summary->sum_buf = NULL; 57e631ddbaSFerenc Havasi 58e631ddbaSFerenc Havasi kfree(c->summary); 59e631ddbaSFerenc Havasi c->summary = NULL; 60e631ddbaSFerenc Havasi } 61e631ddbaSFerenc Havasi 62e631ddbaSFerenc Havasi static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) 63e631ddbaSFerenc Havasi { 64e631ddbaSFerenc Havasi if (!s->sum_list_head) 65e631ddbaSFerenc Havasi s->sum_list_head = (union jffs2_sum_mem *) item; 66e631ddbaSFerenc Havasi if (s->sum_list_tail) 67e631ddbaSFerenc Havasi s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; 68e631ddbaSFerenc Havasi s->sum_list_tail = (union jffs2_sum_mem *) item; 69e631ddbaSFerenc Havasi 70e631ddbaSFerenc Havasi switch (je16_to_cpu(item->u.nodetype)) { 71e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: 72e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_INODE_SIZE; 73e631ddbaSFerenc Havasi s->sum_num++; 74e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("inode (%u) added to summary\n", 75e631ddbaSFerenc Havasi je32_to_cpu(item->i.inode)); 76e631ddbaSFerenc Havasi break; 77e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: 78e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); 79e631ddbaSFerenc Havasi s->sum_num++; 80e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("dirent (%u) added to summary\n", 81e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino)); 82e631ddbaSFerenc Havasi break; 83e631ddbaSFerenc Havasi default: 84e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n", 85e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype)); 86e631ddbaSFerenc Havasi return 1; 87e631ddbaSFerenc Havasi } 88e631ddbaSFerenc Havasi return 0; 89e631ddbaSFerenc Havasi } 90e631ddbaSFerenc Havasi 91e631ddbaSFerenc Havasi 92e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 93e631ddbaSFerenc Havasi 94e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 95e631ddbaSFerenc Havasi { 96e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("called with %u\n", size); 97e631ddbaSFerenc Havasi s->sum_padded += size; 98e631ddbaSFerenc Havasi return 0; 99e631ddbaSFerenc Havasi } 100e631ddbaSFerenc Havasi 101e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 102e631ddbaSFerenc Havasi uint32_t ofs) 103e631ddbaSFerenc Havasi { 104e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 105e631ddbaSFerenc Havasi 106e631ddbaSFerenc Havasi if (!temp) 107e631ddbaSFerenc Havasi return -ENOMEM; 108e631ddbaSFerenc Havasi 109e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype; 110e631ddbaSFerenc Havasi temp->inode = ri->ino; 111e631ddbaSFerenc Havasi temp->version = ri->version; 112e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ 113e631ddbaSFerenc Havasi temp->totlen = ri->totlen; 114e631ddbaSFerenc Havasi temp->next = NULL; 115e631ddbaSFerenc Havasi 116e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 117e631ddbaSFerenc Havasi } 118e631ddbaSFerenc Havasi 119e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 120e631ddbaSFerenc Havasi uint32_t ofs) 121e631ddbaSFerenc Havasi { 122e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 123e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 124e631ddbaSFerenc Havasi 125e631ddbaSFerenc Havasi if (!temp) 126e631ddbaSFerenc Havasi return -ENOMEM; 127e631ddbaSFerenc Havasi 128e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype; 129e631ddbaSFerenc Havasi temp->totlen = rd->totlen; 130e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ 131e631ddbaSFerenc Havasi temp->pino = rd->pino; 132e631ddbaSFerenc Havasi temp->version = rd->version; 133e631ddbaSFerenc Havasi temp->ino = rd->ino; 134e631ddbaSFerenc Havasi temp->nsize = rd->nsize; 135e631ddbaSFerenc Havasi temp->type = rd->type; 136e631ddbaSFerenc Havasi temp->next = NULL; 137e631ddbaSFerenc Havasi 138e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize); 139e631ddbaSFerenc Havasi 140e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 141e631ddbaSFerenc Havasi } 142e631ddbaSFerenc Havasi 143e631ddbaSFerenc Havasi /* Cleanup every collected summary information */ 144e631ddbaSFerenc Havasi 145e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s) 146e631ddbaSFerenc Havasi { 147e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 148e631ddbaSFerenc Havasi 149e631ddbaSFerenc Havasi if (!s->sum_list_head) { 150e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("already empty\n"); 151e631ddbaSFerenc Havasi } 152e631ddbaSFerenc Havasi while (s->sum_list_head) { 153e631ddbaSFerenc Havasi temp = s->sum_list_head; 154e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next; 155e631ddbaSFerenc Havasi kfree(temp); 156e631ddbaSFerenc Havasi } 157e631ddbaSFerenc Havasi s->sum_list_tail = NULL; 158e631ddbaSFerenc Havasi s->sum_padded = 0; 159e631ddbaSFerenc Havasi s->sum_num = 0; 160e631ddbaSFerenc Havasi } 161e631ddbaSFerenc Havasi 162e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s) 163e631ddbaSFerenc Havasi { 164e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("called\n"); 165e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 166e631ddbaSFerenc Havasi s->sum_size = 0; 167e631ddbaSFerenc Havasi } 168e631ddbaSFerenc Havasi 169e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s) 170e631ddbaSFerenc Havasi { 171e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("called\n"); 172e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 173e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 174e631ddbaSFerenc Havasi } 175e631ddbaSFerenc Havasi 176e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s) 177e631ddbaSFerenc Havasi { 178e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 179e631ddbaSFerenc Havasi } 180e631ddbaSFerenc Havasi 181e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */ 182e631ddbaSFerenc Havasi 183e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 184e631ddbaSFerenc Havasi { 185e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 186e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num, 187e631ddbaSFerenc Havasi s->sum_size, s->sum_num); 188e631ddbaSFerenc Havasi 189e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size; 190e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num; 191e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded; 192e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head; 193e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail; 194e631ddbaSFerenc Havasi 195e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL; 196e631ddbaSFerenc Havasi } 197e631ddbaSFerenc Havasi 198e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */ 199e631ddbaSFerenc Havasi 200e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 201e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs) 202e631ddbaSFerenc Havasi { 203e631ddbaSFerenc Havasi union jffs2_node_union *node; 204e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 205e631ddbaSFerenc Havasi 206e631ddbaSFerenc Havasi node = invecs[0].iov_base; 207e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size]; 208e631ddbaSFerenc Havasi ofs -= jeb->offset; 209e631ddbaSFerenc Havasi 210e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) { 211e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 212e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = 213e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 214e631ddbaSFerenc Havasi 215e631ddbaSFerenc Havasi if (!temp) 216e631ddbaSFerenc Havasi goto no_mem; 217e631ddbaSFerenc Havasi 218e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype; 219e631ddbaSFerenc Havasi temp->inode = node->i.ino; 220e631ddbaSFerenc Havasi temp->version = node->i.version; 221e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 222e631ddbaSFerenc Havasi temp->totlen = node->i.totlen; 223e631ddbaSFerenc Havasi temp->next = NULL; 224e631ddbaSFerenc Havasi 225e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 226e631ddbaSFerenc Havasi } 227e631ddbaSFerenc Havasi 228e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 229e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 230e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 231e631ddbaSFerenc Havasi 232e631ddbaSFerenc Havasi if (!temp) 233e631ddbaSFerenc Havasi goto no_mem; 234e631ddbaSFerenc Havasi 235e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype; 236e631ddbaSFerenc Havasi temp->totlen = node->d.totlen; 237e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 238e631ddbaSFerenc Havasi temp->pino = node->d.pino; 239e631ddbaSFerenc Havasi temp->version = node->d.version; 240e631ddbaSFerenc Havasi temp->ino = node->d.ino; 241e631ddbaSFerenc Havasi temp->nsize = node->d.nsize; 242e631ddbaSFerenc Havasi temp->type = node->d.type; 243e631ddbaSFerenc Havasi temp->next = NULL; 244e631ddbaSFerenc Havasi 245e631ddbaSFerenc Havasi switch (count) { 246e631ddbaSFerenc Havasi case 1: 247e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize); 248e631ddbaSFerenc Havasi break; 249e631ddbaSFerenc Havasi 250e631ddbaSFerenc Havasi case 2: 251e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 252e631ddbaSFerenc Havasi break; 253e631ddbaSFerenc Havasi 254e631ddbaSFerenc Havasi default: 255e631ddbaSFerenc Havasi BUG(); /* impossible count value */ 256e631ddbaSFerenc Havasi break; 257e631ddbaSFerenc Havasi } 258e631ddbaSFerenc Havasi 259e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 260e631ddbaSFerenc Havasi } 261e631ddbaSFerenc Havasi 262e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING: 263e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("node PADDING\n"); 264e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen); 265e631ddbaSFerenc Havasi break; 266e631ddbaSFerenc Havasi 267e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER: 268e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("node CLEANMARKER\n"); 269e631ddbaSFerenc Havasi break; 270e631ddbaSFerenc Havasi 271e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY: 272e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("node SUMMARY\n"); 273e631ddbaSFerenc Havasi break; 274e631ddbaSFerenc Havasi 275e631ddbaSFerenc Havasi default: 276e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement 277e631ddbaSFerenc Havasi summary support for it or disable summary. 278e631ddbaSFerenc Havasi */ 279e631ddbaSFerenc Havasi BUG(); 280e631ddbaSFerenc Havasi break; 281e631ddbaSFerenc Havasi } 282e631ddbaSFerenc Havasi 283e631ddbaSFerenc Havasi return 0; 284e631ddbaSFerenc Havasi 285e631ddbaSFerenc Havasi no_mem: 286e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 287e631ddbaSFerenc Havasi return -ENOMEM; 288e631ddbaSFerenc Havasi } 289e631ddbaSFerenc Havasi 290e631ddbaSFerenc Havasi 291e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 292e631ddbaSFerenc Havasi 293e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 294e631ddbaSFerenc Havasi struct jffs2_summary_node *summary, uint32_t *pseudo_random) 295e631ddbaSFerenc Havasi { 296e631ddbaSFerenc Havasi struct jffs2_raw_node_ref *raw; 297e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic; 298e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd; 299e631ddbaSFerenc Havasi void *sp; 300e631ddbaSFerenc Havasi int i, ino; 301e631ddbaSFerenc Havasi 302e631ddbaSFerenc Havasi sp = summary->sum; 303e631ddbaSFerenc Havasi 304e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 305e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("processing summary index %d\n", i); 306e631ddbaSFerenc Havasi 307e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 308e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 309e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi; 310e631ddbaSFerenc Havasi spi = sp; 311e631ddbaSFerenc Havasi 312e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode); 313e631ddbaSFerenc Havasi 314e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Inode at 0x%08x\n", 315e631ddbaSFerenc Havasi jeb->offset + je32_to_cpu(spi->offset)); 316e631ddbaSFerenc Havasi 317e631ddbaSFerenc Havasi raw = jffs2_alloc_raw_node_ref(); 318e631ddbaSFerenc Havasi if (!raw) { 319e631ddbaSFerenc Havasi JFFS2_NOTICE("allocation of node reference failed\n"); 320e631ddbaSFerenc Havasi kfree(summary); 321e631ddbaSFerenc Havasi return -ENOMEM; 322e631ddbaSFerenc Havasi } 323e631ddbaSFerenc Havasi 324e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino); 325e631ddbaSFerenc Havasi if (!ic) { 326e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n"); 327e631ddbaSFerenc Havasi jffs2_free_raw_node_ref(raw); 328e631ddbaSFerenc Havasi kfree(summary); 329e631ddbaSFerenc Havasi return -ENOMEM; 330e631ddbaSFerenc Havasi } 331e631ddbaSFerenc Havasi 332e631ddbaSFerenc Havasi raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED; 333e631ddbaSFerenc Havasi raw->__totlen = PAD(je32_to_cpu(spi->totlen)); 334e631ddbaSFerenc Havasi raw->next_phys = NULL; 335e631ddbaSFerenc Havasi raw->next_in_ino = ic->nodes; 336e631ddbaSFerenc Havasi 337e631ddbaSFerenc Havasi ic->nodes = raw; 338e631ddbaSFerenc Havasi if (!jeb->first_node) 339e631ddbaSFerenc Havasi jeb->first_node = raw; 340e631ddbaSFerenc Havasi if (jeb->last_node) 341e631ddbaSFerenc Havasi jeb->last_node->next_phys = raw; 342e631ddbaSFerenc Havasi jeb->last_node = raw; 343e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spi->version); 344e631ddbaSFerenc Havasi 345e631ddbaSFerenc Havasi UNCHECKED_SPACE(PAD(je32_to_cpu(spi->totlen))); 346e631ddbaSFerenc Havasi 347e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE; 348e631ddbaSFerenc Havasi 349e631ddbaSFerenc Havasi break; 350e631ddbaSFerenc Havasi } 351e631ddbaSFerenc Havasi 352e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 353e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd; 354e631ddbaSFerenc Havasi spd = sp; 355e631ddbaSFerenc Havasi 356e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Dirent at 0x%08x\n", 357e631ddbaSFerenc Havasi jeb->offset + je32_to_cpu(spd->offset)); 358e631ddbaSFerenc Havasi 359e631ddbaSFerenc Havasi fd = jffs2_alloc_full_dirent(spd->nsize+1); 360e631ddbaSFerenc Havasi if (!fd) { 361e631ddbaSFerenc Havasi kfree(summary); 362e631ddbaSFerenc Havasi return -ENOMEM; 363e631ddbaSFerenc Havasi } 364e631ddbaSFerenc Havasi 365e631ddbaSFerenc Havasi memcpy(&fd->name, spd->name, spd->nsize); 366e631ddbaSFerenc Havasi fd->name[spd->nsize] = 0; 367e631ddbaSFerenc Havasi 368e631ddbaSFerenc Havasi raw = jffs2_alloc_raw_node_ref(); 369e631ddbaSFerenc Havasi if (!raw) { 370e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 371e631ddbaSFerenc Havasi JFFS2_NOTICE("allocation of node reference failed\n"); 372e631ddbaSFerenc Havasi kfree(summary); 373e631ddbaSFerenc Havasi return -ENOMEM; 374e631ddbaSFerenc Havasi } 375e631ddbaSFerenc Havasi 376e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 377e631ddbaSFerenc Havasi if (!ic) { 378e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 379e631ddbaSFerenc Havasi jffs2_free_raw_node_ref(raw); 380e631ddbaSFerenc Havasi kfree(summary); 381e631ddbaSFerenc Havasi return -ENOMEM; 382e631ddbaSFerenc Havasi } 383e631ddbaSFerenc Havasi 384e631ddbaSFerenc Havasi raw->__totlen = PAD(je32_to_cpu(spd->totlen)); 385e631ddbaSFerenc Havasi raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE; 386e631ddbaSFerenc Havasi raw->next_phys = NULL; 387e631ddbaSFerenc Havasi raw->next_in_ino = ic->nodes; 388e631ddbaSFerenc Havasi ic->nodes = raw; 389e631ddbaSFerenc Havasi if (!jeb->first_node) 390e631ddbaSFerenc Havasi jeb->first_node = raw; 391e631ddbaSFerenc Havasi if (jeb->last_node) 392e631ddbaSFerenc Havasi jeb->last_node->next_phys = raw; 393e631ddbaSFerenc Havasi jeb->last_node = raw; 394e631ddbaSFerenc Havasi 395e631ddbaSFerenc Havasi fd->raw = raw; 396e631ddbaSFerenc Havasi fd->next = NULL; 397e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version); 398e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino); 399e631ddbaSFerenc Havasi fd->nhash = full_name_hash(fd->name, spd->nsize); 400e631ddbaSFerenc Havasi fd->type = spd->type; 401e631ddbaSFerenc Havasi USED_SPACE(PAD(je32_to_cpu(spd->totlen))); 402e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 403e631ddbaSFerenc Havasi 404e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version); 405e631ddbaSFerenc Havasi 406e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 407e631ddbaSFerenc Havasi 408e631ddbaSFerenc Havasi break; 409e631ddbaSFerenc Havasi } 410e631ddbaSFerenc Havasi 411e631ddbaSFerenc Havasi default : { 412e631ddbaSFerenc Havasi JFFS2_WARNING("Unsupported node type found in summary! Exiting..."); 413e631ddbaSFerenc Havasi kfree(summary); 414e631ddbaSFerenc Havasi return -EIO; 415e631ddbaSFerenc Havasi } 416e631ddbaSFerenc Havasi } 417e631ddbaSFerenc Havasi } 418e631ddbaSFerenc Havasi 419e631ddbaSFerenc Havasi kfree(summary); 420e631ddbaSFerenc Havasi return 0; 421e631ddbaSFerenc Havasi } 422e631ddbaSFerenc Havasi 423e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */ 424e631ddbaSFerenc Havasi 425e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 426e631ddbaSFerenc Havasi uint32_t ofs, uint32_t *pseudo_random) 427e631ddbaSFerenc Havasi { 428e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode; 429e631ddbaSFerenc Havasi struct jffs2_raw_node_ref *cache_ref; 430e631ddbaSFerenc Havasi struct jffs2_summary_node *summary; 431e631ddbaSFerenc Havasi int ret, sumsize; 432e631ddbaSFerenc Havasi uint32_t crc; 433e631ddbaSFerenc Havasi 434e631ddbaSFerenc Havasi sumsize = c->sector_size - ofs; 435e631ddbaSFerenc Havasi ofs += jeb->offset; 436e631ddbaSFerenc Havasi 437e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 438e631ddbaSFerenc Havasi jeb->offset, ofs, sumsize); 439e631ddbaSFerenc Havasi 440e631ddbaSFerenc Havasi summary = kmalloc(sumsize, GFP_KERNEL); 441e631ddbaSFerenc Havasi 442e631ddbaSFerenc Havasi if (!summary) { 443e631ddbaSFerenc Havasi return -ENOMEM; 444e631ddbaSFerenc Havasi } 445e631ddbaSFerenc Havasi 446e631ddbaSFerenc Havasi ret = jffs2_fill_scan_buf(c, (unsigned char *)summary, ofs, sumsize); 447e631ddbaSFerenc Havasi 448e631ddbaSFerenc Havasi if (ret) { 449e631ddbaSFerenc Havasi kfree(summary); 450e631ddbaSFerenc Havasi return ret; 451e631ddbaSFerenc Havasi } 452e631ddbaSFerenc Havasi 453e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */ 454e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 455e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 456e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen; 457e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4); 458e631ddbaSFerenc Havasi 459e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) { 460e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Summary node header is corrupt (bad CRC or " 461e631ddbaSFerenc Havasi "no summary at all)\n"); 462e631ddbaSFerenc Havasi goto crc_err; 463e631ddbaSFerenc Havasi } 464e631ddbaSFerenc Havasi 465e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) { 466e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Summary node is corrupt (wrong erasesize?)\n"); 467e631ddbaSFerenc Havasi goto crc_err; 468e631ddbaSFerenc Havasi } 469e631ddbaSFerenc Havasi 470e631ddbaSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_summary_node)-8); 471e631ddbaSFerenc Havasi 472e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) { 473e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Summary node is corrupt (bad CRC)\n"); 474e631ddbaSFerenc Havasi goto crc_err; 475e631ddbaSFerenc Havasi } 476e631ddbaSFerenc Havasi 477e631ddbaSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_summary_node)); 478e631ddbaSFerenc Havasi 479e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) { 480e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Summary node data is corrupt (bad CRC)\n"); 481e631ddbaSFerenc Havasi goto crc_err; 482e631ddbaSFerenc Havasi } 483e631ddbaSFerenc Havasi 484e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) { 485e631ddbaSFerenc Havasi 486e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("Summary : CLEANMARKER node \n"); 487e631ddbaSFerenc Havasi 488e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 489e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 490e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 491e631ddbaSFerenc Havasi UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); 492e631ddbaSFerenc Havasi } else if (jeb->first_node) { 493e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("CLEANMARKER node not first node in block " 494e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset); 495e631ddbaSFerenc Havasi UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); 496e631ddbaSFerenc Havasi } else { 497e631ddbaSFerenc Havasi struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref(); 498e631ddbaSFerenc Havasi 499e631ddbaSFerenc Havasi if (!marker_ref) { 500e631ddbaSFerenc Havasi JFFS2_NOTICE("Failed to allocate node ref for clean marker\n"); 501e631ddbaSFerenc Havasi kfree(summary); 502e631ddbaSFerenc Havasi return -ENOMEM; 503e631ddbaSFerenc Havasi } 504e631ddbaSFerenc Havasi 505e631ddbaSFerenc Havasi marker_ref->next_in_ino = NULL; 506e631ddbaSFerenc Havasi marker_ref->next_phys = NULL; 507e631ddbaSFerenc Havasi marker_ref->flash_offset = jeb->offset | REF_NORMAL; 508e631ddbaSFerenc Havasi marker_ref->__totlen = je32_to_cpu(summary->cln_mkr); 509e631ddbaSFerenc Havasi jeb->first_node = jeb->last_node = marker_ref; 510e631ddbaSFerenc Havasi 511e631ddbaSFerenc Havasi USED_SPACE( PAD(je32_to_cpu(summary->cln_mkr)) ); 512e631ddbaSFerenc Havasi } 513e631ddbaSFerenc Havasi } 514e631ddbaSFerenc Havasi 515e631ddbaSFerenc Havasi if (je32_to_cpu(summary->padded)) { 516e631ddbaSFerenc Havasi DIRTY_SPACE(je32_to_cpu(summary->padded)); 517e631ddbaSFerenc Havasi } 518e631ddbaSFerenc Havasi 519e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 520e631ddbaSFerenc Havasi if (ret) 521e631ddbaSFerenc Havasi return ret; 522e631ddbaSFerenc Havasi 523e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */ 524e631ddbaSFerenc Havasi cache_ref = jffs2_alloc_raw_node_ref(); 525e631ddbaSFerenc Havasi 526e631ddbaSFerenc Havasi if (!cache_ref) { 527e631ddbaSFerenc Havasi JFFS2_NOTICE("Failed to allocate node ref for cache\n"); 528e631ddbaSFerenc Havasi return -ENOMEM; 529e631ddbaSFerenc Havasi } 530e631ddbaSFerenc Havasi 531e631ddbaSFerenc Havasi cache_ref->next_in_ino = NULL; 532e631ddbaSFerenc Havasi cache_ref->next_phys = NULL; 533e631ddbaSFerenc Havasi cache_ref->flash_offset = ofs | REF_NORMAL; 534e631ddbaSFerenc Havasi cache_ref->__totlen = sumsize; 535e631ddbaSFerenc Havasi 536e631ddbaSFerenc Havasi if (!jeb->first_node) 537e631ddbaSFerenc Havasi jeb->first_node = cache_ref; 538e631ddbaSFerenc Havasi if (jeb->last_node) 539e631ddbaSFerenc Havasi jeb->last_node->next_phys = cache_ref; 540e631ddbaSFerenc Havasi jeb->last_node = cache_ref; 541e631ddbaSFerenc Havasi 542e631ddbaSFerenc Havasi USED_SPACE(sumsize); 543e631ddbaSFerenc Havasi 544e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size; 545e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size; 546e631ddbaSFerenc Havasi c->free_size -= jeb->free_size; 547e631ddbaSFerenc Havasi jeb->free_size = 0; 548e631ddbaSFerenc Havasi 549e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb); 550e631ddbaSFerenc Havasi 551e631ddbaSFerenc Havasi crc_err: 552e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 553e631ddbaSFerenc Havasi 554e631ddbaSFerenc Havasi return 0; 555e631ddbaSFerenc Havasi } 556e631ddbaSFerenc Havasi 557e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 558e631ddbaSFerenc Havasi 559e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 560e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize) 561e631ddbaSFerenc Havasi { 562e631ddbaSFerenc Havasi struct jffs2_summary_node isum; 563e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 564e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm; 565e631ddbaSFerenc Havasi struct kvec vecs[2]; 566e631ddbaSFerenc Havasi void *wpage; 567e631ddbaSFerenc Havasi int ret; 568e631ddbaSFerenc Havasi size_t retlen; 569e631ddbaSFerenc Havasi 570e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize); 571e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum)); 572e631ddbaSFerenc Havasi 573e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 574e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 575e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize); 576e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 577e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded); 578e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 579e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num); 580e631ddbaSFerenc Havasi wpage = c->summary->sum_buf; 581e631ddbaSFerenc Havasi 582e631ddbaSFerenc Havasi while (c->summary->sum_num) { 583e631ddbaSFerenc Havasi 584e631ddbaSFerenc Havasi switch (je16_to_cpu(c->summary->sum_list_head->u.nodetype)) { 585e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 586e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage; 587e631ddbaSFerenc Havasi 588e631ddbaSFerenc Havasi sino_ptr->nodetype = c->summary->sum_list_head->i.nodetype; 589e631ddbaSFerenc Havasi sino_ptr->inode = c->summary->sum_list_head->i.inode; 590e631ddbaSFerenc Havasi sino_ptr->version = c->summary->sum_list_head->i.version; 591e631ddbaSFerenc Havasi sino_ptr->offset = c->summary->sum_list_head->i.offset; 592e631ddbaSFerenc Havasi sino_ptr->totlen = c->summary->sum_list_head->i.totlen; 593e631ddbaSFerenc Havasi 594e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE; 595e631ddbaSFerenc Havasi 596e631ddbaSFerenc Havasi break; 597e631ddbaSFerenc Havasi } 598e631ddbaSFerenc Havasi 599e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 600e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 601e631ddbaSFerenc Havasi 602e631ddbaSFerenc Havasi sdrnt_ptr->nodetype = c->summary->sum_list_head->d.nodetype; 603e631ddbaSFerenc Havasi sdrnt_ptr->totlen = c->summary->sum_list_head->d.totlen; 604e631ddbaSFerenc Havasi sdrnt_ptr->offset = c->summary->sum_list_head->d.offset; 605e631ddbaSFerenc Havasi sdrnt_ptr->pino = c->summary->sum_list_head->d.pino; 606e631ddbaSFerenc Havasi sdrnt_ptr->version = c->summary->sum_list_head->d.version; 607e631ddbaSFerenc Havasi sdrnt_ptr->ino = c->summary->sum_list_head->d.ino; 608e631ddbaSFerenc Havasi sdrnt_ptr->nsize = c->summary->sum_list_head->d.nsize; 609e631ddbaSFerenc Havasi sdrnt_ptr->type = c->summary->sum_list_head->d.type; 610e631ddbaSFerenc Havasi 611e631ddbaSFerenc Havasi memcpy(sdrnt_ptr->name, c->summary->sum_list_head->d.name, 612e631ddbaSFerenc Havasi c->summary->sum_list_head->d.nsize); 613e631ddbaSFerenc Havasi 614e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_DIRENT_SIZE(c->summary->sum_list_head->d.nsize); 615e631ddbaSFerenc Havasi 616e631ddbaSFerenc Havasi break; 617e631ddbaSFerenc Havasi } 618e631ddbaSFerenc Havasi 619e631ddbaSFerenc Havasi default : { 620e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */ 621e631ddbaSFerenc Havasi } 622e631ddbaSFerenc Havasi } 623e631ddbaSFerenc Havasi 624e631ddbaSFerenc Havasi temp = c->summary->sum_list_head; 625e631ddbaSFerenc Havasi c->summary->sum_list_head = c->summary->sum_list_head->u.next; 626e631ddbaSFerenc Havasi kfree(temp); 627e631ddbaSFerenc Havasi 628e631ddbaSFerenc Havasi c->summary->sum_num--; 629e631ddbaSFerenc Havasi } 630e631ddbaSFerenc Havasi 631e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary); 632e631ddbaSFerenc Havasi 633e631ddbaSFerenc Havasi wpage += padsize; 634e631ddbaSFerenc Havasi 635e631ddbaSFerenc Havasi sm = wpage; 636e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 637e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 638e631ddbaSFerenc Havasi 639e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 640e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 641e631ddbaSFerenc Havasi 642e631ddbaSFerenc Havasi vecs[0].iov_base = &isum; 643e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum); 644e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf; 645e631ddbaSFerenc Havasi vecs[1].iov_len = datasize; 646e631ddbaSFerenc Havasi 647e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("JFFS2: writing out data to flash to pos : 0x%08x\n", 648e631ddbaSFerenc Havasi jeb->offset + c->sector_size - jeb->free_size); 649e631ddbaSFerenc Havasi 650e631ddbaSFerenc Havasi spin_unlock(&c->erase_completion_lock); 651e631ddbaSFerenc Havasi ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size - 652e631ddbaSFerenc Havasi jeb->free_size, &retlen, 0); 653e631ddbaSFerenc Havasi spin_lock(&c->erase_completion_lock); 654e631ddbaSFerenc Havasi 655e631ddbaSFerenc Havasi 656e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) { 657e631ddbaSFerenc Havasi JFFS2_WARNING("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 658e631ddbaSFerenc Havasi infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen); 659e631ddbaSFerenc Havasi 660e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 661e631ddbaSFerenc Havasi WASTED_SPACE(infosize); 662e631ddbaSFerenc Havasi 663e631ddbaSFerenc Havasi return 1; 664e631ddbaSFerenc Havasi } 665e631ddbaSFerenc Havasi 666e631ddbaSFerenc Havasi return 0; 667e631ddbaSFerenc Havasi } 668e631ddbaSFerenc Havasi 669e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */ 670e631ddbaSFerenc Havasi 671e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 672e631ddbaSFerenc Havasi { 673e631ddbaSFerenc Havasi struct jffs2_raw_node_ref *summary_ref; 674e631ddbaSFerenc Havasi int datasize, infosize, padsize, ret; 675e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 676e631ddbaSFerenc Havasi 677e631ddbaSFerenc Havasi JFFS2_DBG_SUMMARY("called\n"); 678e631ddbaSFerenc Havasi 679e631ddbaSFerenc Havasi jeb = c->nextblock; 680e631ddbaSFerenc Havasi 681e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) { 682e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n"); 683e631ddbaSFerenc Havasi BUG(); 684e631ddbaSFerenc Havasi } 685e631ddbaSFerenc Havasi 686e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 687e631ddbaSFerenc Havasi infosize = sizeof(struct jffs2_summary_node) + datasize; 688e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize; 689e631ddbaSFerenc Havasi infosize += padsize; 690e631ddbaSFerenc Havasi datasize += padsize; 691e631ddbaSFerenc Havasi 692e631ddbaSFerenc Havasi /* Is there enough space for summary? */ 693e631ddbaSFerenc Havasi if (padsize < 0) { 694e631ddbaSFerenc Havasi /* don't try to write out summary for this jeb */ 695e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 696e631ddbaSFerenc Havasi 697e631ddbaSFerenc Havasi JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); 698e631ddbaSFerenc Havasi return 0; 699e631ddbaSFerenc Havasi } 700e631ddbaSFerenc Havasi 701e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 702e631ddbaSFerenc Havasi if (ret) 703e631ddbaSFerenc Havasi return 0; /* can't write out summary, block is marked as NOSUM_SIZE */ 704e631ddbaSFerenc Havasi 705e631ddbaSFerenc Havasi /* for ACCT_PARANOIA_CHECK */ 706e631ddbaSFerenc Havasi spin_unlock(&c->erase_completion_lock); 707e631ddbaSFerenc Havasi summary_ref = jffs2_alloc_raw_node_ref(); 708e631ddbaSFerenc Havasi spin_lock(&c->erase_completion_lock); 709e631ddbaSFerenc Havasi 710e631ddbaSFerenc Havasi if (!summary_ref) { 711e631ddbaSFerenc Havasi JFFS2_NOTICE("Failed to allocate node ref for summary\n"); 712e631ddbaSFerenc Havasi return -ENOMEM; 713e631ddbaSFerenc Havasi } 714e631ddbaSFerenc Havasi 715e631ddbaSFerenc Havasi summary_ref->next_in_ino = NULL; 716e631ddbaSFerenc Havasi summary_ref->next_phys = NULL; 717e631ddbaSFerenc Havasi summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL; 718e631ddbaSFerenc Havasi summary_ref->__totlen = infosize; 719e631ddbaSFerenc Havasi 720e631ddbaSFerenc Havasi if (!jeb->first_node) 721e631ddbaSFerenc Havasi jeb->first_node = summary_ref; 722e631ddbaSFerenc Havasi if (jeb->last_node) 723e631ddbaSFerenc Havasi jeb->last_node->next_phys = summary_ref; 724e631ddbaSFerenc Havasi jeb->last_node = summary_ref; 725e631ddbaSFerenc Havasi 726e631ddbaSFerenc Havasi USED_SPACE(infosize); 727e631ddbaSFerenc Havasi 728e631ddbaSFerenc Havasi return 0; 729e631ddbaSFerenc Havasi } 730