11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2001-2003 Red Hat, Inc. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 91da177e4SLinus Torvalds * 10e631ddbaSFerenc Havasi * $Id: write.c,v 1.96 2005/09/07 08:34:55 havasi Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/fs.h> 161da177e4SLinus Torvalds #include <linux/crc32.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/pagemap.h> 191da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 201da177e4SLinus Torvalds #include "nodelist.h" 211da177e4SLinus Torvalds #include "compr.h" 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri) 251da177e4SLinus Torvalds { 261da177e4SLinus Torvalds struct jffs2_inode_cache *ic; 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds ic = jffs2_alloc_inode_cache(); 291da177e4SLinus Torvalds if (!ic) { 301da177e4SLinus Torvalds return -ENOMEM; 311da177e4SLinus Torvalds } 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds memset(ic, 0, sizeof(*ic)); 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds f->inocache = ic; 361da177e4SLinus Torvalds f->inocache->nlink = 1; 371da177e4SLinus Torvalds f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; 381da177e4SLinus Torvalds f->inocache->state = INO_STATE_PRESENT; 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds jffs2_add_ino_cache(c, f->inocache); 427d200960SDavid Woodhouse D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); 437d200960SDavid Woodhouse ri->ino = cpu_to_je32(f->inocache->ino); 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 461da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 471da177e4SLinus Torvalds ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); 481da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 491da177e4SLinus Torvalds ri->mode = cpu_to_jemode(mode); 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds f->highest_version = 1; 521da177e4SLinus Torvalds ri->version = cpu_to_je32(f->highest_version); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds return 0; 551da177e4SLinus Torvalds } 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, 581da177e4SLinus Torvalds write it to the flash, link it into the existing inode/fragment list */ 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const unsigned char *data, uint32_t datalen, uint32_t flash_ofs, int alloc_mode) 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds { 631da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 641da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 651da177e4SLinus Torvalds size_t retlen; 661da177e4SLinus Torvalds struct kvec vecs[2]; 671da177e4SLinus Torvalds int ret; 681da177e4SLinus Torvalds int retried = 0; 691da177e4SLinus Torvalds unsigned long cnt = 2; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { 721da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); 731da177e4SLinus Torvalds BUG(); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds ); 761da177e4SLinus Torvalds vecs[0].iov_base = ri; 771da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*ri); 781da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)data; 791da177e4SLinus Torvalds vecs[1].iov_len = datalen; 801da177e4SLinus Torvalds 81730554d9SArtem B. Bityutskiy jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { 841da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_write_dnode: ri->totlen (0x%08x) != sizeof(*ri) (0x%08zx) + datalen (0x%08x)\n", je32_to_cpu(ri->totlen), sizeof(*ri), datalen); 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 871da177e4SLinus Torvalds if (!raw) 881da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds fn = jffs2_alloc_full_dnode(); 911da177e4SLinus Torvalds if (!fn) { 921da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 931da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds fn->ofs = je32_to_cpu(ri->offset); 971da177e4SLinus Torvalds fn->size = je32_to_cpu(ri->dsize); 981da177e4SLinus Torvalds fn->frags = 0; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds /* check number of valid vecs */ 1011da177e4SLinus Torvalds if (!datalen || !data) 1021da177e4SLinus Torvalds cnt = 1; 1031da177e4SLinus Torvalds retry: 1041da177e4SLinus Torvalds fn->raw = raw; 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 1071da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*ri)+datalen); 1081da177e4SLinus Torvalds raw->next_phys = NULL; 1091da177e4SLinus Torvalds 1109b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { 1119b88f473SEstelle Hammache BUG_ON(!retried); 1129b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " 1139b88f473SEstelle Hammache "highest version %d -> updating dnode\n", 114e4803c30SEstelle Hammache je32_to_cpu(ri->version), f->highest_version)); 115e4803c30SEstelle Hammache ri->version = cpu_to_je32(++f->highest_version); 116e4803c30SEstelle Hammache ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 117e4803c30SEstelle Hammache } 118e4803c30SEstelle Hammache 1191da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, 1201da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:f->inocache->ino); 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds if (ret || (retlen != sizeof(*ri) + datalen)) { 1231da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 1241da177e4SLinus Torvalds sizeof(*ri)+datalen, flash_ofs, ret, retlen); 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds /* Mark the space as dirtied */ 1271da177e4SLinus Torvalds if (retlen) { 1281da177e4SLinus Torvalds /* Doesn't belong to any inode */ 1291da177e4SLinus Torvalds raw->next_in_ino = NULL; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* Don't change raw->size to match retlen. We may have 1321da177e4SLinus Torvalds written the node header already, and only the data will 1331da177e4SLinus Torvalds seem corrupted, in which case the scan would skip over 1341da177e4SLinus Torvalds any node we write before the original intended end of 1351da177e4SLinus Torvalds this node */ 1361da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 1371da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 1381da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 1391da177e4SLinus Torvalds } else { 1401da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 1411da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { 1441da177e4SLinus Torvalds /* Try to reallocate space and retry */ 1451da177e4SLinus Torvalds uint32_t dummy; 1461da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds retried = 1; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 1511da177e4SLinus Torvalds 152730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 153730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 156e631ddbaSFerenc Havasi ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, 157e631ddbaSFerenc Havasi &dummy, JFFS2_SUMMARY_INODE_SIZE); 1581da177e4SLinus Torvalds } else { 1591da177e4SLinus Torvalds /* Locking pain */ 1601da177e4SLinus Torvalds up(&f->sem); 1611da177e4SLinus Torvalds jffs2_complete_reservation(c); 1621da177e4SLinus Torvalds 163e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, 164e631ddbaSFerenc Havasi &dummy, alloc_mode, JFFS2_SUMMARY_INODE_SIZE); 1651da177e4SLinus Torvalds down(&f->sem); 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds if (!ret) { 1691da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 1701da177e4SLinus Torvalds 171730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 172730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds goto retry; 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 1771da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 1801da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 1811da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds /* Mark the space used */ 1841da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 1851da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 1861da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 1871da177e4SLinus Torvalds */ 1881da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 1891da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 1901da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 1911da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 1921da177e4SLinus Torvalds } else { 1931da177e4SLinus Torvalds raw->flash_offset |= REF_NORMAL; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds /* Link into per-inode list */ 1981da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 1991da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 2001da177e4SLinus Torvalds f->inocache->nodes = raw; 2011da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode wrote node at 0x%08x(%d) with dsize 0x%x, csize 0x%x, node_crc 0x%08x, data_crc 0x%08x, totlen 0x%08x\n", 2041da177e4SLinus Torvalds flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), 2051da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 2061da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds if (retried) { 209730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds return fn; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_dirent *rd, const unsigned char *name, uint32_t namelen, uint32_t flash_ofs, int alloc_mode) 2161da177e4SLinus Torvalds { 2171da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2181da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2191da177e4SLinus Torvalds size_t retlen; 2201da177e4SLinus Torvalds struct kvec vecs[2]; 2211da177e4SLinus Torvalds int retried = 0; 2221da177e4SLinus Torvalds int ret; 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2251da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2261da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 227730554d9SArtem B. Bityutskiy 2281da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2291da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2301da177e4SLinus Torvalds BUG(); 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds ); 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds vecs[0].iov_base = rd; 2351da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2361da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2371da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2381da177e4SLinus Torvalds 239e0c8e42fSArtem B. Bityutskiy jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 240e0c8e42fSArtem B. Bityutskiy 2411da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds if (!raw) 2441da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2471da177e4SLinus Torvalds if (!fd) { 2481da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2491da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2531da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2541da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2551da177e4SLinus Torvalds fd->type = rd->type; 2561da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2571da177e4SLinus Torvalds fd->name[namelen]=0; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds retry: 2601da177e4SLinus Torvalds fd->raw = raw; 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 2631da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*rd)+namelen); 2641da177e4SLinus Torvalds raw->next_phys = NULL; 2651da177e4SLinus Torvalds 2669b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2679b88f473SEstelle Hammache BUG_ON(!retried); 2689b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2699b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 270e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 271e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 272e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 273e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 274e4803c30SEstelle Hammache } 275e4803c30SEstelle Hammache 2761da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2771da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2781da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2791da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2801da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2811da177e4SLinus Torvalds /* Mark the space as dirtied */ 2821da177e4SLinus Torvalds if (retlen) { 2831da177e4SLinus Torvalds raw->next_in_ino = NULL; 2841da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 2851da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 2861da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 2871da177e4SLinus Torvalds } else { 2881da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 2891da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2901da177e4SLinus Torvalds } 2911da177e4SLinus Torvalds if (!retried && (raw = jffs2_alloc_raw_node_ref())) { 2921da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2931da177e4SLinus Torvalds uint32_t dummy; 2941da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds retried = 1; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 2991da177e4SLinus Torvalds 300730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 301730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 304e631ddbaSFerenc Havasi ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, 305e631ddbaSFerenc Havasi &dummy, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 3061da177e4SLinus Torvalds } else { 3071da177e4SLinus Torvalds /* Locking pain */ 3081da177e4SLinus Torvalds up(&f->sem); 3091da177e4SLinus Torvalds jffs2_complete_reservation(c); 3101da177e4SLinus Torvalds 311e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, 312e631ddbaSFerenc Havasi &dummy, alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 3131da177e4SLinus Torvalds down(&f->sem); 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds if (!ret) { 3171da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 318730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 319730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3201da177e4SLinus Torvalds goto retry; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 3231da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3261da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3271da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds /* Mark the space used */ 3301da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 3311da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3341da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 3351da177e4SLinus Torvalds f->inocache->nodes = raw; 3361da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds if (retried) { 339730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds return fd; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3461da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3471da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3481da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3491da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3501da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3511da177e4SLinus Torvalds { 3521da177e4SLinus Torvalds int ret = 0; 3531da177e4SLinus Torvalds uint32_t writtenlen = 0; 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3561da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds while(writelen) { 3591da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3601da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3611da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3621da177e4SLinus Torvalds uint32_t phys_ofs, alloclen; 3631da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3641da177e4SLinus Torvalds int retried = 0; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds retry: 3671da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3681da177e4SLinus Torvalds 369e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, 370e631ddbaSFerenc Havasi &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); 3711da177e4SLinus Torvalds if (ret) { 3721da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3731da177e4SLinus Torvalds break; 3741da177e4SLinus Torvalds } 3751da177e4SLinus Torvalds down(&f->sem); 3761da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3771da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3821da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3831da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3841da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3871da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3881da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3891da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3901da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3911da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3921da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3931da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3941da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3951da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds if (IS_ERR(fn)) { 4021da177e4SLinus Torvalds ret = PTR_ERR(fn); 4031da177e4SLinus Torvalds up(&f->sem); 4041da177e4SLinus Torvalds jffs2_complete_reservation(c); 4051da177e4SLinus Torvalds if (!retried) { 4061da177e4SLinus Torvalds /* Write error to be retried */ 4071da177e4SLinus Torvalds retried = 1; 4081da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 4091da177e4SLinus Torvalds goto retry; 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds break; 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 4141da177e4SLinus Torvalds if (f->metadata) { 4151da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 4161da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 4171da177e4SLinus Torvalds f->metadata = NULL; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds if (ret) { 4201da177e4SLinus Torvalds /* Eep */ 4211da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 4221da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4231da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds up(&f->sem); 4261da177e4SLinus Torvalds jffs2_complete_reservation(c); 4271da177e4SLinus Torvalds break; 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds up(&f->sem); 4301da177e4SLinus Torvalds jffs2_complete_reservation(c); 4311da177e4SLinus Torvalds if (!datalen) { 4321da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4331da177e4SLinus Torvalds ret = -EIO; 4341da177e4SLinus Torvalds break; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4371da177e4SLinus Torvalds writtenlen += datalen; 4381da177e4SLinus Torvalds offset += datalen; 4391da177e4SLinus Torvalds writelen -= datalen; 4401da177e4SLinus Torvalds buf += datalen; 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds *retlen = writtenlen; 4431da177e4SLinus Torvalds return ret; 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen) 4471da177e4SLinus Torvalds { 4481da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4491da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4501da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4511da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 4521da177e4SLinus Torvalds int ret; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4551da177e4SLinus Torvalds * Just the node will do for now, though 4561da177e4SLinus Torvalds */ 457e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL, 458e631ddbaSFerenc Havasi JFFS2_SUMMARY_INODE_SIZE); 4591da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4601da177e4SLinus Torvalds if (ret) { 4611da177e4SLinus Torvalds up(&f->sem); 4621da177e4SLinus Torvalds return ret; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4661da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4711da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds if (IS_ERR(fn)) { 4741da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4751da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4761da177e4SLinus Torvalds up(&f->sem); 4771da177e4SLinus Torvalds jffs2_complete_reservation(c); 4781da177e4SLinus Torvalds return PTR_ERR(fn); 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4811da177e4SLinus Torvalds obsoleted by the first data write 4821da177e4SLinus Torvalds */ 4831da177e4SLinus Torvalds f->metadata = fn; 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds up(&f->sem); 4861da177e4SLinus Torvalds jffs2_complete_reservation(c); 487e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, 488e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds if (ret) { 4911da177e4SLinus Torvalds /* Eep. */ 4921da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4931da177e4SLinus Torvalds return ret; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4971da177e4SLinus Torvalds if (!rd) { 4981da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4991da177e4SLinus Torvalds jffs2_complete_reservation(c); 5001da177e4SLinus Torvalds return -ENOMEM; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds down(&dir_f->sem); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5061da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5071da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5081da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5111da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5121da177e4SLinus Torvalds rd->ino = ri->ino; 5131da177e4SLinus Torvalds rd->mctime = ri->ctime; 5141da177e4SLinus Torvalds rd->nsize = namelen; 5151da177e4SLinus Torvalds rd->type = DT_REG; 5161da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5171da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds if (IS_ERR(fd)) { 5241da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5251da177e4SLinus Torvalds as if it were the final unlink() */ 5261da177e4SLinus Torvalds jffs2_complete_reservation(c); 5271da177e4SLinus Torvalds up(&dir_f->sem); 5281da177e4SLinus Torvalds return PTR_ERR(fd); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5321da177e4SLinus Torvalds one if necessary. */ 5331da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds jffs2_complete_reservation(c); 5361da177e4SLinus Torvalds up(&dir_f->sem); 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds return 0; 5391da177e4SLinus Torvalds } 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5433a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5443a69e0cdSArtem B. Bityutskiy uint32_t time) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5471da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5481da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 5491da177e4SLinus Torvalds int ret; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds if (1 /* alternative branch needs testing */ || 5521da177e4SLinus Torvalds !jffs2_can_mark_obsolete(c)) { 5531da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5561da177e4SLinus Torvalds if (!rd) 5571da177e4SLinus Torvalds return -ENOMEM; 5581da177e4SLinus Torvalds 559e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, 560e631ddbaSFerenc Havasi ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 5611da177e4SLinus Torvalds if (ret) { 5621da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5631da177e4SLinus Torvalds return ret; 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds down(&dir_f->sem); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds /* Build a deletion node */ 5691da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5701da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5711da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5721da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5751da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5761da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5773a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5781da177e4SLinus Torvalds rd->nsize = namelen; 5791da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5801da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5811da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION); 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds if (IS_ERR(fd)) { 5881da177e4SLinus Torvalds jffs2_complete_reservation(c); 5891da177e4SLinus Torvalds up(&dir_f->sem); 5901da177e4SLinus Torvalds return PTR_ERR(fd); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5941da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5951da177e4SLinus Torvalds up(&dir_f->sem); 5961da177e4SLinus Torvalds } else { 5971da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 5981da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds down(&dir_f->sem); 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 6031da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 6041da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 6051da177e4SLinus Torvalds !(*prev)->name[namelen]) { 6061da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 6091da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds *prev = this->next; 6121da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 6131da177e4SLinus Torvalds jffs2_free_full_dirent(this); 6141da177e4SLinus Torvalds break; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds prev = &((*prev)->next); 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds up(&dir_f->sem); 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 6221da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 6231da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 6241da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds down(&dead_f->sem); 6271da177e4SLinus Torvalds 62832f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 6291da177e4SLinus Torvalds while (dead_f->dents) { 6301da177e4SLinus Torvalds /* There can be only deleted ones */ 6311da177e4SLinus Torvalds fd = dead_f->dents; 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds dead_f->dents = fd->next; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds if (fd->ino) { 6361da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6371da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6381da177e4SLinus Torvalds } else { 63932f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 64032f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6431da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6441da177e4SLinus Torvalds } 64532f1a95dSArtem B. Bityuckiy } 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds dead_f->inocache->nlink--; 6481da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6491da177e4SLinus Torvalds up(&dead_f->sem); 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds jffs2_complete_reservation(c); 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds return 0; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds 6583a69e0cdSArtem B. Bityutskiy int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, uint8_t type, const char *name, int namelen, uint32_t time) 6591da177e4SLinus Torvalds { 6601da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6611da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6621da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 6631da177e4SLinus Torvalds int ret; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6661da177e4SLinus Torvalds if (!rd) 6671da177e4SLinus Torvalds return -ENOMEM; 6681da177e4SLinus Torvalds 669e631ddbaSFerenc Havasi ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, 670e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 6711da177e4SLinus Torvalds if (ret) { 6721da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6731da177e4SLinus Torvalds return ret; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds down(&dir_f->sem); 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds /* Build a deletion node */ 6791da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6801da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6811da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6821da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6831da177e4SLinus Torvalds 6841da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6851da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6861da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6873a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6881da177e4SLinus Torvalds rd->nsize = namelen; 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds rd->type = type; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6931da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds if (IS_ERR(fd)) { 7001da177e4SLinus Torvalds jffs2_complete_reservation(c); 7011da177e4SLinus Torvalds up(&dir_f->sem); 7021da177e4SLinus Torvalds return PTR_ERR(fd); 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 7061da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds jffs2_complete_reservation(c); 7091da177e4SLinus Torvalds up(&dir_f->sem); 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds return 0; 7121da177e4SLinus Torvalds } 713