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 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 * 122bc9764cSFerenc Havasi * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $ 13e631ddbaSFerenc Havasi * 14e631ddbaSFerenc Havasi */ 15e631ddbaSFerenc Havasi 16e631ddbaSFerenc Havasi #include <linux/kernel.h> 17e631ddbaSFerenc Havasi #include <linux/sched.h> 18e631ddbaSFerenc Havasi #include <linux/slab.h> 19e631ddbaSFerenc Havasi #include <linux/mtd/mtd.h> 20e631ddbaSFerenc Havasi #include <linux/pagemap.h> 21e631ddbaSFerenc Havasi #include <linux/crc32.h> 22e631ddbaSFerenc Havasi #include <linux/compiler.h> 23e631ddbaSFerenc Havasi #include <linux/vmalloc.h> 24e631ddbaSFerenc Havasi #include "nodelist.h" 25e631ddbaSFerenc Havasi #include "debug.h" 26e631ddbaSFerenc Havasi 27e631ddbaSFerenc Havasi int jffs2_sum_init(struct jffs2_sb_info *c) 28e631ddbaSFerenc Havasi { 293d375d9eSYan Burman c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); 30e631ddbaSFerenc Havasi 31e631ddbaSFerenc Havasi if (!c->summary) { 32e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate memory for summary information!\n"); 33e631ddbaSFerenc Havasi return -ENOMEM; 34e631ddbaSFerenc Havasi } 35e631ddbaSFerenc Havasi 36e631ddbaSFerenc Havasi c->summary->sum_buf = vmalloc(c->sector_size); 37e631ddbaSFerenc Havasi 38e631ddbaSFerenc Havasi if (!c->summary->sum_buf) { 39e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 40733802d9SArtem B. Bityutskiy kfree(c->summary); 41e631ddbaSFerenc Havasi return -ENOMEM; 42e631ddbaSFerenc Havasi } 43e631ddbaSFerenc Havasi 44d6e05edcSAndreas Mohr dbg_summary("returned successfully\n"); 45e631ddbaSFerenc Havasi 46e631ddbaSFerenc Havasi return 0; 47e631ddbaSFerenc Havasi } 48e631ddbaSFerenc Havasi 49e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c) 50e631ddbaSFerenc Havasi { 51733802d9SArtem B. Bityutskiy 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++; 74733802d9SArtem B. Bityutskiy 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++; 80733802d9SArtem B. Bityutskiy dbg_summary("dirent (%u) added to summary\n", 81e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino)); 82e631ddbaSFerenc Havasi break; 83aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 84aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: 85aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; 86aa98d7cfSKaiGai Kohei s->sum_num++; 87aa98d7cfSKaiGai Kohei dbg_summary("xattr (xid=%u, version=%u) added to summary\n", 88aa98d7cfSKaiGai Kohei je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); 89aa98d7cfSKaiGai Kohei break; 90aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: 91aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XREF_SIZE; 92aa98d7cfSKaiGai Kohei s->sum_num++; 93aa98d7cfSKaiGai Kohei dbg_summary("xref added to summary\n"); 94aa98d7cfSKaiGai Kohei break; 95aa98d7cfSKaiGai Kohei #endif 96e631ddbaSFerenc Havasi default: 97e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n", 98e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype)); 99e631ddbaSFerenc Havasi return 1; 100e631ddbaSFerenc Havasi } 101e631ddbaSFerenc Havasi return 0; 102e631ddbaSFerenc Havasi } 103e631ddbaSFerenc Havasi 104e631ddbaSFerenc Havasi 105e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 106e631ddbaSFerenc Havasi 107e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 108e631ddbaSFerenc Havasi { 109733802d9SArtem B. Bityutskiy dbg_summary("called with %u\n", size); 110e631ddbaSFerenc Havasi s->sum_padded += size; 111e631ddbaSFerenc Havasi return 0; 112e631ddbaSFerenc Havasi } 113e631ddbaSFerenc Havasi 114e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 115e631ddbaSFerenc Havasi uint32_t ofs) 116e631ddbaSFerenc Havasi { 117e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 118e631ddbaSFerenc Havasi 119e631ddbaSFerenc Havasi if (!temp) 120e631ddbaSFerenc Havasi return -ENOMEM; 121e631ddbaSFerenc Havasi 122e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype; 123e631ddbaSFerenc Havasi temp->inode = ri->ino; 124e631ddbaSFerenc Havasi temp->version = ri->version; 125e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ 126e631ddbaSFerenc Havasi temp->totlen = ri->totlen; 127e631ddbaSFerenc Havasi temp->next = NULL; 128e631ddbaSFerenc Havasi 129e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 130e631ddbaSFerenc Havasi } 131e631ddbaSFerenc Havasi 132e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 133e631ddbaSFerenc Havasi uint32_t ofs) 134e631ddbaSFerenc Havasi { 135e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 136e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 137e631ddbaSFerenc Havasi 138e631ddbaSFerenc Havasi if (!temp) 139e631ddbaSFerenc Havasi return -ENOMEM; 140e631ddbaSFerenc Havasi 141e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype; 142e631ddbaSFerenc Havasi temp->totlen = rd->totlen; 143e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ 144e631ddbaSFerenc Havasi temp->pino = rd->pino; 145e631ddbaSFerenc Havasi temp->version = rd->version; 146e631ddbaSFerenc Havasi temp->ino = rd->ino; 147e631ddbaSFerenc Havasi temp->nsize = rd->nsize; 148e631ddbaSFerenc Havasi temp->type = rd->type; 149e631ddbaSFerenc Havasi temp->next = NULL; 150e631ddbaSFerenc Havasi 151e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize); 152e631ddbaSFerenc Havasi 153e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 154e631ddbaSFerenc Havasi } 155e631ddbaSFerenc Havasi 156aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 157aa98d7cfSKaiGai Kohei int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) 158aa98d7cfSKaiGai Kohei { 159aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 160aa98d7cfSKaiGai Kohei 161aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 162aa98d7cfSKaiGai Kohei if (!temp) 163aa98d7cfSKaiGai Kohei return -ENOMEM; 164aa98d7cfSKaiGai Kohei 165aa98d7cfSKaiGai Kohei temp->nodetype = rx->nodetype; 166aa98d7cfSKaiGai Kohei temp->xid = rx->xid; 167aa98d7cfSKaiGai Kohei temp->version = rx->version; 168aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 169aa98d7cfSKaiGai Kohei temp->totlen = rx->totlen; 170aa98d7cfSKaiGai Kohei temp->next = NULL; 171aa98d7cfSKaiGai Kohei 172aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 173aa98d7cfSKaiGai Kohei } 174aa98d7cfSKaiGai Kohei 175aa98d7cfSKaiGai Kohei int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) 176aa98d7cfSKaiGai Kohei { 177aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 178aa98d7cfSKaiGai Kohei 179aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 180aa98d7cfSKaiGai Kohei if (!temp) 181aa98d7cfSKaiGai Kohei return -ENOMEM; 182aa98d7cfSKaiGai Kohei 183aa98d7cfSKaiGai Kohei temp->nodetype = rr->nodetype; 184aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 185aa98d7cfSKaiGai Kohei temp->next = NULL; 186aa98d7cfSKaiGai Kohei 187aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 188aa98d7cfSKaiGai Kohei } 189aa98d7cfSKaiGai Kohei #endif 190e631ddbaSFerenc Havasi /* Cleanup every collected summary information */ 191e631ddbaSFerenc Havasi 192e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s) 193e631ddbaSFerenc Havasi { 194e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 195e631ddbaSFerenc Havasi 196e631ddbaSFerenc Havasi if (!s->sum_list_head) { 197733802d9SArtem B. Bityutskiy dbg_summary("already empty\n"); 198e631ddbaSFerenc Havasi } 199e631ddbaSFerenc Havasi while (s->sum_list_head) { 200e631ddbaSFerenc Havasi temp = s->sum_list_head; 201e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next; 202e631ddbaSFerenc Havasi kfree(temp); 203e631ddbaSFerenc Havasi } 204e631ddbaSFerenc Havasi s->sum_list_tail = NULL; 205e631ddbaSFerenc Havasi s->sum_padded = 0; 206e631ddbaSFerenc Havasi s->sum_num = 0; 207e631ddbaSFerenc Havasi } 208e631ddbaSFerenc Havasi 209e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s) 210e631ddbaSFerenc Havasi { 211733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 212e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 213e631ddbaSFerenc Havasi s->sum_size = 0; 214e631ddbaSFerenc Havasi } 215e631ddbaSFerenc Havasi 216e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s) 217e631ddbaSFerenc Havasi { 218733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 219e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 220e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 221e631ddbaSFerenc Havasi } 222e631ddbaSFerenc Havasi 223e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s) 224e631ddbaSFerenc Havasi { 225e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 226e631ddbaSFerenc Havasi } 227e631ddbaSFerenc Havasi 228e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */ 229e631ddbaSFerenc Havasi 230e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 231e631ddbaSFerenc Havasi { 232733802d9SArtem B. Bityutskiy dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 233e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num, 234e631ddbaSFerenc Havasi s->sum_size, s->sum_num); 235e631ddbaSFerenc Havasi 236e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size; 237e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num; 238e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded; 239e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head; 240e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail; 241e631ddbaSFerenc Havasi 242e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL; 243e631ddbaSFerenc Havasi } 244e631ddbaSFerenc Havasi 245e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */ 246e631ddbaSFerenc Havasi 247e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 248e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs) 249e631ddbaSFerenc Havasi { 250e631ddbaSFerenc Havasi union jffs2_node_union *node; 251e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 252e631ddbaSFerenc Havasi 25327bea327SZoltan Sogor if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { 25427bea327SZoltan Sogor dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n"); 25527bea327SZoltan Sogor return 0; 25627bea327SZoltan Sogor } 25727bea327SZoltan Sogor 258e631ddbaSFerenc Havasi node = invecs[0].iov_base; 259e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size]; 260e631ddbaSFerenc Havasi ofs -= jeb->offset; 261e631ddbaSFerenc Havasi 262e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) { 263e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 264e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = 265e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 266e631ddbaSFerenc Havasi 267e631ddbaSFerenc Havasi if (!temp) 268e631ddbaSFerenc Havasi goto no_mem; 269e631ddbaSFerenc Havasi 270e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype; 271e631ddbaSFerenc Havasi temp->inode = node->i.ino; 272e631ddbaSFerenc Havasi temp->version = node->i.version; 273e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 274e631ddbaSFerenc Havasi temp->totlen = node->i.totlen; 275e631ddbaSFerenc Havasi temp->next = NULL; 276e631ddbaSFerenc Havasi 277e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 278e631ddbaSFerenc Havasi } 279e631ddbaSFerenc Havasi 280e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 281e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 282e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 283e631ddbaSFerenc Havasi 284e631ddbaSFerenc Havasi if (!temp) 285e631ddbaSFerenc Havasi goto no_mem; 286e631ddbaSFerenc Havasi 287e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype; 288e631ddbaSFerenc Havasi temp->totlen = node->d.totlen; 289e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 290e631ddbaSFerenc Havasi temp->pino = node->d.pino; 291e631ddbaSFerenc Havasi temp->version = node->d.version; 292e631ddbaSFerenc Havasi temp->ino = node->d.ino; 293e631ddbaSFerenc Havasi temp->nsize = node->d.nsize; 294e631ddbaSFerenc Havasi temp->type = node->d.type; 295e631ddbaSFerenc Havasi temp->next = NULL; 296e631ddbaSFerenc Havasi 297e631ddbaSFerenc Havasi switch (count) { 298e631ddbaSFerenc Havasi case 1: 299e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize); 300e631ddbaSFerenc Havasi break; 301e631ddbaSFerenc Havasi 302e631ddbaSFerenc Havasi case 2: 303e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 304e631ddbaSFerenc Havasi break; 305e631ddbaSFerenc Havasi 306e631ddbaSFerenc Havasi default: 307e631ddbaSFerenc Havasi BUG(); /* impossible count value */ 308e631ddbaSFerenc Havasi break; 309e631ddbaSFerenc Havasi } 310e631ddbaSFerenc Havasi 311e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 312e631ddbaSFerenc Havasi } 313aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 314aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 315aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 316aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 317aa98d7cfSKaiGai Kohei if (!temp) 318aa98d7cfSKaiGai Kohei goto no_mem; 319e631ddbaSFerenc Havasi 320aa98d7cfSKaiGai Kohei temp->nodetype = node->x.nodetype; 321aa98d7cfSKaiGai Kohei temp->xid = node->x.xid; 322aa98d7cfSKaiGai Kohei temp->version = node->x.version; 323aa98d7cfSKaiGai Kohei temp->totlen = node->x.totlen; 324aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 325aa98d7cfSKaiGai Kohei temp->next = NULL; 326aa98d7cfSKaiGai Kohei 327aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 328aa98d7cfSKaiGai Kohei } 329aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 330aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 331aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 332aa98d7cfSKaiGai Kohei if (!temp) 333aa98d7cfSKaiGai Kohei goto no_mem; 334aa98d7cfSKaiGai Kohei temp->nodetype = node->r.nodetype; 335aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 336aa98d7cfSKaiGai Kohei temp->next = NULL; 337aa98d7cfSKaiGai Kohei 338aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 339aa98d7cfSKaiGai Kohei } 340aa98d7cfSKaiGai Kohei #endif 341e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING: 342733802d9SArtem B. Bityutskiy dbg_summary("node PADDING\n"); 343e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen); 344e631ddbaSFerenc Havasi break; 345e631ddbaSFerenc Havasi 346e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER: 347733802d9SArtem B. Bityutskiy dbg_summary("node CLEANMARKER\n"); 348e631ddbaSFerenc Havasi break; 349e631ddbaSFerenc Havasi 350e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY: 351733802d9SArtem B. Bityutskiy dbg_summary("node SUMMARY\n"); 352e631ddbaSFerenc Havasi break; 353e631ddbaSFerenc Havasi 354e631ddbaSFerenc Havasi default: 355e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement 356e631ddbaSFerenc Havasi summary support for it or disable summary. 357e631ddbaSFerenc Havasi */ 358e631ddbaSFerenc Havasi BUG(); 359e631ddbaSFerenc Havasi break; 360e631ddbaSFerenc Havasi } 361e631ddbaSFerenc Havasi 362e631ddbaSFerenc Havasi return 0; 363e631ddbaSFerenc Havasi 364e631ddbaSFerenc Havasi no_mem: 365e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 366e631ddbaSFerenc Havasi return -ENOMEM; 367e631ddbaSFerenc Havasi } 368e631ddbaSFerenc Havasi 3692f785402SDavid Woodhouse static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, 3702f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3712f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 3722f785402SDavid Woodhouse struct jffs2_inode_cache *ic) 37349f11d40SDavid Woodhouse { 37449f11d40SDavid Woodhouse /* If there was a gap, mark it dirty */ 3752f785402SDavid Woodhouse if ((ofs & ~3) > c->sector_size - jeb->free_size) { 3762f785402SDavid Woodhouse /* Ew. Summary doesn't actually tell us explicitly about dirty space */ 3772f785402SDavid Woodhouse jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); 37849f11d40SDavid Woodhouse } 37949f11d40SDavid Woodhouse 3802f785402SDavid Woodhouse return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); 38149f11d40SDavid Woodhouse } 382e631ddbaSFerenc Havasi 383e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 384e631ddbaSFerenc Havasi 385e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 3862bc9764cSFerenc Havasi struct jffs2_raw_summary *summary, uint32_t *pseudo_random) 387e631ddbaSFerenc Havasi { 388e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic; 389e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd; 390e631ddbaSFerenc Havasi void *sp; 391e631ddbaSFerenc Havasi int i, ino; 39268270995SDavid Woodhouse int err; 393e631ddbaSFerenc Havasi 394e631ddbaSFerenc Havasi sp = summary->sum; 395e631ddbaSFerenc Havasi 396e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 397733802d9SArtem B. Bityutskiy dbg_summary("processing summary index %d\n", i); 398e631ddbaSFerenc Havasi 3992f785402SDavid Woodhouse /* Make sure there's a spare ref for dirty space */ 400046b8b98SDavid Woodhouse err = jffs2_prealloc_raw_node_refs(c, jeb, 2); 4012f785402SDavid Woodhouse if (err) 4022f785402SDavid Woodhouse return err; 4032f785402SDavid Woodhouse 404e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 405e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 406e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi; 407e631ddbaSFerenc Havasi spi = sp; 408e631ddbaSFerenc Havasi 409e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode); 410e631ddbaSFerenc Havasi 4119167e0f8SDavid Woodhouse dbg_summary("Inode at 0x%08x-0x%08x\n", 4129167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset), 4138b9e9fe8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); 414e631ddbaSFerenc Havasi 415e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino); 416e631ddbaSFerenc Havasi if (!ic) { 417e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n"); 418e631ddbaSFerenc Havasi return -ENOMEM; 419e631ddbaSFerenc Havasi } 420e631ddbaSFerenc Havasi 4212f785402SDavid Woodhouse sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, 4222f785402SDavid Woodhouse PAD(je32_to_cpu(spi->totlen)), ic); 423f1f9671bSDavid Woodhouse 424f1f9671bSDavid Woodhouse *pseudo_random += je32_to_cpu(spi->version); 425e631ddbaSFerenc Havasi 426e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE; 427e631ddbaSFerenc Havasi 428e631ddbaSFerenc Havasi break; 429e631ddbaSFerenc Havasi } 430e631ddbaSFerenc Havasi 431e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 432e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd; 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 440e631ddbaSFerenc Havasi fd = jffs2_alloc_full_dirent(spd->nsize+1); 4419641b784SDavid Woodhouse if (!fd) 442e631ddbaSFerenc Havasi return -ENOMEM; 443e631ddbaSFerenc Havasi 444e631ddbaSFerenc Havasi memcpy(&fd->name, spd->name, spd->nsize); 445e631ddbaSFerenc Havasi fd->name[spd->nsize] = 0; 446e631ddbaSFerenc Havasi 447e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 448e631ddbaSFerenc Havasi if (!ic) { 449e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 450e631ddbaSFerenc Havasi return -ENOMEM; 451e631ddbaSFerenc Havasi } 452e631ddbaSFerenc Havasi 4531046d880SDavid Woodhouse fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, 4542f785402SDavid Woodhouse PAD(je32_to_cpu(spd->totlen)), ic); 455e631ddbaSFerenc Havasi 456e631ddbaSFerenc Havasi fd->next = NULL; 457e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version); 458e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino); 459e631ddbaSFerenc Havasi fd->nhash = full_name_hash(fd->name, spd->nsize); 460e631ddbaSFerenc Havasi fd->type = spd->type; 461f1f9671bSDavid Woodhouse 462e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 463e631ddbaSFerenc Havasi 464e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version); 465e631ddbaSFerenc Havasi 466e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 467e631ddbaSFerenc Havasi 468e631ddbaSFerenc Havasi break; 469e631ddbaSFerenc Havasi } 470aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 471aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 472aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 473aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *spx; 474e631ddbaSFerenc Havasi 475aa98d7cfSKaiGai Kohei spx = (struct jffs2_sum_xattr_flash *)sp; 4769167e0f8SDavid Woodhouse dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 47749f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset), 4789167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), 479aa98d7cfSKaiGai Kohei je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); 4802f785402SDavid Woodhouse 481aa98d7cfSKaiGai Kohei xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), 482aa98d7cfSKaiGai Kohei je32_to_cpu(spx->version)); 483c9f700f8SKaiGai Kohei if (IS_ERR(xd)) 484aa98d7cfSKaiGai Kohei return PTR_ERR(xd); 485c9f700f8SKaiGai Kohei if (xd->version > je32_to_cpu(spx->version)) { 486c9f700f8SKaiGai Kohei /* node is not the newest one */ 487c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw 488c9f700f8SKaiGai Kohei = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 4892f785402SDavid Woodhouse PAD(je32_to_cpu(spx->totlen)), NULL); 490c9f700f8SKaiGai Kohei raw->next_in_ino = xd->node->next_in_ino; 491c9f700f8SKaiGai Kohei xd->node->next_in_ino = raw; 492c9f700f8SKaiGai Kohei } else { 493c9f700f8SKaiGai Kohei xd->version = je32_to_cpu(spx->version); 494c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 495c9f700f8SKaiGai Kohei PAD(je32_to_cpu(spx->totlen)), (void *)xd); 496c9f700f8SKaiGai Kohei } 497aa98d7cfSKaiGai Kohei *pseudo_random += je32_to_cpu(spx->xid); 498aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XATTR_SIZE; 499aa98d7cfSKaiGai Kohei 500aa98d7cfSKaiGai Kohei break; 501aa98d7cfSKaiGai Kohei } 502aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 503aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 504aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *spr; 505aa98d7cfSKaiGai Kohei 506aa98d7cfSKaiGai Kohei spr = (struct jffs2_sum_xref_flash *)sp; 5079167e0f8SDavid Woodhouse dbg_summary("xref at %#08x-%#08x\n", 50849f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset), 5099bfeb691SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset) + 5109bfeb691SDavid Woodhouse (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); 5119167e0f8SDavid Woodhouse 512aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 513aa98d7cfSKaiGai Kohei if (!ref) { 514aa98d7cfSKaiGai Kohei JFFS2_NOTICE("allocation of xattr_datum failed\n"); 515aa98d7cfSKaiGai Kohei return -ENOMEM; 516aa98d7cfSKaiGai Kohei } 5178f2b6f49SKaiGai Kohei ref->next = c->xref_temp; 5188f2b6f49SKaiGai Kohei c->xref_temp = ref; 519aa98d7cfSKaiGai Kohei 520c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, 521c9f700f8SKaiGai Kohei PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); 522aa98d7cfSKaiGai Kohei 5232f785402SDavid Woodhouse *pseudo_random += ref->node->flash_offset; 524aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XREF_SIZE; 525aa98d7cfSKaiGai Kohei 526aa98d7cfSKaiGai Kohei break; 527aa98d7cfSKaiGai Kohei } 528aa98d7cfSKaiGai Kohei #endif 529e631ddbaSFerenc Havasi default : { 5307807ef7bSDavid Woodhouse uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); 5317807ef7bSDavid Woodhouse JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); 5327807ef7bSDavid Woodhouse if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) 533e631ddbaSFerenc Havasi return -EIO; 5347807ef7bSDavid Woodhouse 5357807ef7bSDavid Woodhouse /* For compatible node types, just fall back to the full scan */ 5367807ef7bSDavid Woodhouse c->wasted_size -= jeb->wasted_size; 5377807ef7bSDavid Woodhouse c->free_size += c->sector_size - jeb->free_size; 5387807ef7bSDavid Woodhouse c->used_size -= jeb->used_size; 5397807ef7bSDavid Woodhouse c->dirty_size -= jeb->dirty_size; 5407807ef7bSDavid Woodhouse jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; 5417807ef7bSDavid Woodhouse jeb->free_size = c->sector_size; 5427807ef7bSDavid Woodhouse 543c38c1b61SDavid Woodhouse jffs2_free_jeb_node_refs(c, jeb); 5447807ef7bSDavid Woodhouse return -ENOTRECOVERABLE; 545e631ddbaSFerenc Havasi } 546e631ddbaSFerenc Havasi } 547e631ddbaSFerenc Havasi } 548e631ddbaSFerenc Havasi return 0; 549e631ddbaSFerenc Havasi } 550e631ddbaSFerenc Havasi 551e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */ 552e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 5539641b784SDavid Woodhouse struct jffs2_raw_summary *summary, uint32_t sumsize, 5549641b784SDavid Woodhouse uint32_t *pseudo_random) 555e631ddbaSFerenc Havasi { 556e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode; 5579641b784SDavid Woodhouse int ret, ofs; 558e631ddbaSFerenc Havasi uint32_t crc; 559e631ddbaSFerenc Havasi 56049f11d40SDavid Woodhouse ofs = c->sector_size - sumsize; 561e631ddbaSFerenc Havasi 562733802d9SArtem B. Bityutskiy dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 56349f11d40SDavid Woodhouse jeb->offset, jeb->offset + ofs, sumsize); 564e631ddbaSFerenc Havasi 565e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */ 566e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 567e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 568e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen; 569e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4); 570e631ddbaSFerenc Havasi 571e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) { 572733802d9SArtem B. Bityutskiy dbg_summary("Summary node header is corrupt (bad CRC or " 573e631ddbaSFerenc Havasi "no summary at all)\n"); 574e631ddbaSFerenc Havasi goto crc_err; 575e631ddbaSFerenc Havasi } 576e631ddbaSFerenc Havasi 577e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) { 578733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); 579e631ddbaSFerenc Havasi goto crc_err; 580e631ddbaSFerenc Havasi } 581e631ddbaSFerenc Havasi 5822bc9764cSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); 583e631ddbaSFerenc Havasi 584e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) { 585733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (bad CRC)\n"); 586e631ddbaSFerenc Havasi goto crc_err; 587e631ddbaSFerenc Havasi } 588e631ddbaSFerenc Havasi 5892bc9764cSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); 590e631ddbaSFerenc Havasi 591e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) { 592733802d9SArtem B. Bityutskiy dbg_summary("Summary node data is corrupt (bad CRC)\n"); 593e631ddbaSFerenc Havasi goto crc_err; 594e631ddbaSFerenc Havasi } 595e631ddbaSFerenc Havasi 596e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) { 597e631ddbaSFerenc Havasi 598733802d9SArtem B. Bityutskiy dbg_summary("Summary : CLEANMARKER node \n"); 599e631ddbaSFerenc Havasi 600098a1981SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); 601098a1981SDavid Woodhouse if (ret) 602098a1981SDavid Woodhouse return ret; 603098a1981SDavid Woodhouse 604e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 605733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 606e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 607098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 608098a1981SDavid Woodhouse return ret; 609e631ddbaSFerenc Havasi } else if (jeb->first_node) { 610733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node not first node in block " 611e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset); 612098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 613098a1981SDavid Woodhouse return ret; 614e631ddbaSFerenc Havasi } else { 6152f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, 6162f785402SDavid Woodhouse je32_to_cpu(summary->cln_mkr), NULL); 617e631ddbaSFerenc Havasi } 618e631ddbaSFerenc Havasi } 619e631ddbaSFerenc Havasi 620e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 6217807ef7bSDavid Woodhouse /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full 6227807ef7bSDavid Woodhouse scan of this eraseblock. So return zero */ 6237807ef7bSDavid Woodhouse if (ret == -ENOTRECOVERABLE) 6247807ef7bSDavid Woodhouse return 0; 625e631ddbaSFerenc Havasi if (ret) 6267807ef7bSDavid Woodhouse return ret; /* real error */ 627e631ddbaSFerenc Havasi 628e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */ 629046b8b98SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); 6302f785402SDavid Woodhouse if (ret) 6312f785402SDavid Woodhouse return ret; 632e631ddbaSFerenc Havasi 633f61579c3SDavid Woodhouse sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); 634e631ddbaSFerenc Havasi 63549f11d40SDavid Woodhouse if (unlikely(jeb->free_size)) { 63649f11d40SDavid Woodhouse JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", 63749f11d40SDavid Woodhouse jeb->free_size, jeb->offset); 638e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size; 639e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size; 640e631ddbaSFerenc Havasi c->free_size -= jeb->free_size; 641e631ddbaSFerenc Havasi jeb->free_size = 0; 64249f11d40SDavid Woodhouse } 643e631ddbaSFerenc Havasi 644e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb); 645e631ddbaSFerenc Havasi 646e631ddbaSFerenc Havasi crc_err: 647e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 648e631ddbaSFerenc Havasi 649e631ddbaSFerenc Havasi return 0; 650e631ddbaSFerenc Havasi } 651e631ddbaSFerenc Havasi 652e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 653e631ddbaSFerenc Havasi 654e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 655e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize) 656e631ddbaSFerenc Havasi { 6572bc9764cSFerenc Havasi struct jffs2_raw_summary isum; 658e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 659e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm; 660e631ddbaSFerenc Havasi struct kvec vecs[2]; 6612f785402SDavid Woodhouse uint32_t sum_ofs; 662e631ddbaSFerenc Havasi void *wpage; 663e631ddbaSFerenc Havasi int ret; 664e631ddbaSFerenc Havasi size_t retlen; 665e631ddbaSFerenc Havasi 666e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize); 667e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum)); 668e631ddbaSFerenc Havasi 669e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 670e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 671e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize); 672e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 673e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded); 674e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 675e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num); 676e631ddbaSFerenc Havasi wpage = c->summary->sum_buf; 677e631ddbaSFerenc Havasi 678e631ddbaSFerenc Havasi while (c->summary->sum_num) { 67920ffdcb0SJesper Juhl temp = c->summary->sum_list_head; 680e631ddbaSFerenc Havasi 68120ffdcb0SJesper Juhl switch (je16_to_cpu(temp->u.nodetype)) { 682e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 683e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage; 684e631ddbaSFerenc Havasi 68520ffdcb0SJesper Juhl sino_ptr->nodetype = temp->i.nodetype; 68620ffdcb0SJesper Juhl sino_ptr->inode = temp->i.inode; 68720ffdcb0SJesper Juhl sino_ptr->version = temp->i.version; 68820ffdcb0SJesper Juhl sino_ptr->offset = temp->i.offset; 68920ffdcb0SJesper Juhl sino_ptr->totlen = temp->i.totlen; 690e631ddbaSFerenc Havasi 691e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE; 692e631ddbaSFerenc Havasi 693e631ddbaSFerenc Havasi break; 694e631ddbaSFerenc Havasi } 695e631ddbaSFerenc Havasi 696e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 697e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 698e631ddbaSFerenc Havasi 69920ffdcb0SJesper Juhl sdrnt_ptr->nodetype = temp->d.nodetype; 70020ffdcb0SJesper Juhl sdrnt_ptr->totlen = temp->d.totlen; 70120ffdcb0SJesper Juhl sdrnt_ptr->offset = temp->d.offset; 70220ffdcb0SJesper Juhl sdrnt_ptr->pino = temp->d.pino; 70320ffdcb0SJesper Juhl sdrnt_ptr->version = temp->d.version; 70420ffdcb0SJesper Juhl sdrnt_ptr->ino = temp->d.ino; 70520ffdcb0SJesper Juhl sdrnt_ptr->nsize = temp->d.nsize; 70620ffdcb0SJesper Juhl sdrnt_ptr->type = temp->d.type; 707e631ddbaSFerenc Havasi 70820ffdcb0SJesper Juhl memcpy(sdrnt_ptr->name, temp->d.name, 70920ffdcb0SJesper Juhl temp->d.nsize); 710e631ddbaSFerenc Havasi 71120ffdcb0SJesper Juhl wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); 712e631ddbaSFerenc Havasi 713e631ddbaSFerenc Havasi break; 714e631ddbaSFerenc Havasi } 715aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 716aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 717aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; 718e631ddbaSFerenc Havasi 719aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 720aa98d7cfSKaiGai Kohei sxattr_ptr->nodetype = temp->x.nodetype; 721aa98d7cfSKaiGai Kohei sxattr_ptr->xid = temp->x.xid; 722aa98d7cfSKaiGai Kohei sxattr_ptr->version = temp->x.version; 723aa98d7cfSKaiGai Kohei sxattr_ptr->offset = temp->x.offset; 724aa98d7cfSKaiGai Kohei sxattr_ptr->totlen = temp->x.totlen; 725aa98d7cfSKaiGai Kohei 726aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XATTR_SIZE; 727aa98d7cfSKaiGai Kohei break; 728aa98d7cfSKaiGai Kohei } 729aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 730aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *sxref_ptr = wpage; 731aa98d7cfSKaiGai Kohei 732aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 733aa98d7cfSKaiGai Kohei sxref_ptr->nodetype = temp->r.nodetype; 734aa98d7cfSKaiGai Kohei sxref_ptr->offset = temp->r.offset; 735aa98d7cfSKaiGai Kohei 736aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XREF_SIZE; 737aa98d7cfSKaiGai Kohei break; 738aa98d7cfSKaiGai Kohei } 739aa98d7cfSKaiGai Kohei #endif 740e631ddbaSFerenc Havasi default : { 7416171586aSDavid Woodhouse if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) 7426171586aSDavid Woodhouse == JFFS2_FEATURE_RWCOMPAT_COPY) { 7436171586aSDavid Woodhouse dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", 7446171586aSDavid Woodhouse je16_to_cpu(temp->u.nodetype)); 7456171586aSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 7466171586aSDavid Woodhouse } else { 747e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */ 748e631ddbaSFerenc Havasi } 749e631ddbaSFerenc Havasi } 7506171586aSDavid Woodhouse } 751e631ddbaSFerenc Havasi 75220ffdcb0SJesper Juhl c->summary->sum_list_head = temp->u.next; 753e631ddbaSFerenc Havasi kfree(temp); 754e631ddbaSFerenc Havasi 755e631ddbaSFerenc Havasi c->summary->sum_num--; 756e631ddbaSFerenc Havasi } 757e631ddbaSFerenc Havasi 758e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary); 759e631ddbaSFerenc Havasi 760e631ddbaSFerenc Havasi wpage += padsize; 761e631ddbaSFerenc Havasi 762e631ddbaSFerenc Havasi sm = wpage; 763e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 764e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 765e631ddbaSFerenc Havasi 766e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 767e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 768e631ddbaSFerenc Havasi 769e631ddbaSFerenc Havasi vecs[0].iov_base = &isum; 770e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum); 771e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf; 772e631ddbaSFerenc Havasi vecs[1].iov_len = datasize; 773e631ddbaSFerenc Havasi 7742f785402SDavid Woodhouse sum_ofs = jeb->offset + c->sector_size - jeb->free_size; 775e631ddbaSFerenc Havasi 7762f785402SDavid Woodhouse dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", 7772f785402SDavid Woodhouse sum_ofs); 7782f785402SDavid Woodhouse 7792f785402SDavid Woodhouse ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); 780e631ddbaSFerenc Havasi 781e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) { 782010b06d6SDavid Woodhouse 783c41ff6e5SDavid Woodhouse JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", 7842f785402SDavid Woodhouse infosize, sum_ofs, ret, retlen); 785e631ddbaSFerenc Havasi 7869bfeb691SDavid Woodhouse if (retlen) { 787010b06d6SDavid Woodhouse /* Waste remaining space */ 788010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 7892f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); 7902f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 7919bfeb691SDavid Woodhouse } 792010b06d6SDavid Woodhouse 793e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 794e631ddbaSFerenc Havasi 7952f785402SDavid Woodhouse return 0; 796e631ddbaSFerenc Havasi } 797e631ddbaSFerenc Havasi 798010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 7992f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); 8002f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 801010b06d6SDavid Woodhouse 802e631ddbaSFerenc Havasi return 0; 803e631ddbaSFerenc Havasi } 804e631ddbaSFerenc Havasi 805e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */ 806e631ddbaSFerenc Havasi 807e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 808e631ddbaSFerenc Havasi { 8092f785402SDavid Woodhouse int datasize, infosize, padsize; 810e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 8112f785402SDavid Woodhouse int ret; 812e631ddbaSFerenc Havasi 813733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 814e631ddbaSFerenc Havasi 8152f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8162f785402SDavid Woodhouse 817e631ddbaSFerenc Havasi jeb = c->nextblock; 818046b8b98SDavid Woodhouse jffs2_prealloc_raw_node_refs(c, jeb, 1); 819e631ddbaSFerenc Havasi 820e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) { 821e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n"); 822e631ddbaSFerenc Havasi BUG(); 823e631ddbaSFerenc Havasi } 824e631ddbaSFerenc Havasi 825e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 8262bc9764cSFerenc Havasi infosize = sizeof(struct jffs2_raw_summary) + datasize; 827e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize; 828e631ddbaSFerenc Havasi infosize += padsize; 829e631ddbaSFerenc Havasi datasize += padsize; 830e631ddbaSFerenc Havasi 831e631ddbaSFerenc Havasi /* Is there enough space for summary? */ 832e631ddbaSFerenc Havasi if (padsize < 0) { 833e631ddbaSFerenc Havasi /* don't try to write out summary for this jeb */ 834e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 835e631ddbaSFerenc Havasi 836e631ddbaSFerenc Havasi JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); 8379bfeb691SDavid Woodhouse spin_lock(&c->erase_completion_lock); 838e631ddbaSFerenc Havasi return 0; 839e631ddbaSFerenc Havasi } 840e631ddbaSFerenc Havasi 841e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 842010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8432f785402SDavid Woodhouse return ret; 844e631ddbaSFerenc Havasi } 845