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 * 103a69e0cdSArtem B. Bityutskiy * $Id: write.c,v 1.95 2005/08/17 13:46:23 dedekind 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) { 1561da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, &dummy); 1571da177e4SLinus Torvalds } else { 1581da177e4SLinus Torvalds /* Locking pain */ 1591da177e4SLinus Torvalds up(&f->sem); 1601da177e4SLinus Torvalds jffs2_complete_reservation(c); 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, &dummy, alloc_mode); 1631da177e4SLinus Torvalds down(&f->sem); 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds if (!ret) { 1671da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 1681da177e4SLinus Torvalds 169730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 170730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds goto retry; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 1751da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 1781da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 1791da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds /* Mark the space used */ 1821da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 1831da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 1841da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 1851da177e4SLinus Torvalds */ 1861da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 1871da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 1881da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 1891da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 1901da177e4SLinus Torvalds } else { 1911da177e4SLinus Torvalds raw->flash_offset |= REF_NORMAL; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds /* Link into per-inode list */ 1961da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 1971da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 1981da177e4SLinus Torvalds f->inocache->nodes = raw; 1991da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2001da177e4SLinus Torvalds 2011da177e4SLinus 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", 2021da177e4SLinus Torvalds flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), 2031da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 2041da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds if (retried) { 207730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds return fn; 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds 2131da177e4SLinus 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) 2141da177e4SLinus Torvalds { 2151da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2161da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2171da177e4SLinus Torvalds size_t retlen; 2181da177e4SLinus Torvalds struct kvec vecs[2]; 2191da177e4SLinus Torvalds int retried = 0; 2201da177e4SLinus Torvalds int ret; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2231da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2241da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 225730554d9SArtem B. Bityutskiy 2261da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2271da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2281da177e4SLinus Torvalds BUG(); 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds ); 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds vecs[0].iov_base = rd; 2331da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2341da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2351da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2361da177e4SLinus Torvalds 237e0c8e42fSArtem B. Bityutskiy jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 238e0c8e42fSArtem B. Bityutskiy 2391da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds if (!raw) 2421da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2451da177e4SLinus Torvalds if (!fd) { 2461da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2471da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2511da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2521da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2531da177e4SLinus Torvalds fd->type = rd->type; 2541da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2551da177e4SLinus Torvalds fd->name[namelen]=0; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds retry: 2581da177e4SLinus Torvalds fd->raw = raw; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 2611da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*rd)+namelen); 2621da177e4SLinus Torvalds raw->next_phys = NULL; 2631da177e4SLinus Torvalds 2649b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2659b88f473SEstelle Hammache BUG_ON(!retried); 2669b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2679b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 268e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 269e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 270e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 271e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 272e4803c30SEstelle Hammache } 273e4803c30SEstelle Hammache 2741da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2751da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2761da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2771da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2781da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2791da177e4SLinus Torvalds /* Mark the space as dirtied */ 2801da177e4SLinus Torvalds if (retlen) { 2811da177e4SLinus Torvalds raw->next_in_ino = NULL; 2821da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 2831da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 2841da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 2851da177e4SLinus Torvalds } else { 2861da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 2871da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds if (!retried && (raw = jffs2_alloc_raw_node_ref())) { 2901da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2911da177e4SLinus Torvalds uint32_t dummy; 2921da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds retried = 1; 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 2971da177e4SLinus Torvalds 298730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 299730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 3021da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, &dummy); 3031da177e4SLinus Torvalds } else { 3041da177e4SLinus Torvalds /* Locking pain */ 3051da177e4SLinus Torvalds up(&f->sem); 3061da177e4SLinus Torvalds jffs2_complete_reservation(c); 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, &dummy, alloc_mode); 3091da177e4SLinus Torvalds down(&f->sem); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds if (!ret) { 3131da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 314730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 315730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3161da177e4SLinus Torvalds goto retry; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 3191da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3221da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3231da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds /* Mark the space used */ 3261da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 3271da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3301da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 3311da177e4SLinus Torvalds f->inocache->nodes = raw; 3321da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds if (retried) { 335730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds return fd; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3421da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3431da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3441da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3451da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3461da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds int ret = 0; 3491da177e4SLinus Torvalds uint32_t writtenlen = 0; 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3521da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds while(writelen) { 3551da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3561da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3571da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3581da177e4SLinus Torvalds uint32_t phys_ofs, alloclen; 3591da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3601da177e4SLinus Torvalds int retried = 0; 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds retry: 3631da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, &alloclen, ALLOC_NORMAL); 3661da177e4SLinus Torvalds if (ret) { 3671da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3681da177e4SLinus Torvalds break; 3691da177e4SLinus Torvalds } 3701da177e4SLinus Torvalds down(&f->sem); 3711da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3721da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3771da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3781da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3791da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3821da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3831da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3841da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3851da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3861da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3871da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3881da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3891da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3901da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds if (IS_ERR(fn)) { 3971da177e4SLinus Torvalds ret = PTR_ERR(fn); 3981da177e4SLinus Torvalds up(&f->sem); 3991da177e4SLinus Torvalds jffs2_complete_reservation(c); 4001da177e4SLinus Torvalds if (!retried) { 4011da177e4SLinus Torvalds /* Write error to be retried */ 4021da177e4SLinus Torvalds retried = 1; 4031da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 4041da177e4SLinus Torvalds goto retry; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds break; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 4091da177e4SLinus Torvalds if (f->metadata) { 4101da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 4111da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 4121da177e4SLinus Torvalds f->metadata = NULL; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds if (ret) { 4151da177e4SLinus Torvalds /* Eep */ 4161da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 4171da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4181da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds up(&f->sem); 4211da177e4SLinus Torvalds jffs2_complete_reservation(c); 4221da177e4SLinus Torvalds break; 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds up(&f->sem); 4251da177e4SLinus Torvalds jffs2_complete_reservation(c); 4261da177e4SLinus Torvalds if (!datalen) { 4271da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4281da177e4SLinus Torvalds ret = -EIO; 4291da177e4SLinus Torvalds break; 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4321da177e4SLinus Torvalds writtenlen += datalen; 4331da177e4SLinus Torvalds offset += datalen; 4341da177e4SLinus Torvalds writelen -= datalen; 4351da177e4SLinus Torvalds buf += datalen; 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds *retlen = writtenlen; 4381da177e4SLinus Torvalds return ret; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus 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) 4421da177e4SLinus Torvalds { 4431da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4441da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4451da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4461da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 4471da177e4SLinus Torvalds int ret; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4501da177e4SLinus Torvalds * Just the node will do for now, though 4511da177e4SLinus Torvalds */ 4521da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); 4531da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4541da177e4SLinus Torvalds if (ret) { 4551da177e4SLinus Torvalds up(&f->sem); 4561da177e4SLinus Torvalds return ret; 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4601da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4651da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds if (IS_ERR(fn)) { 4681da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4691da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4701da177e4SLinus Torvalds up(&f->sem); 4711da177e4SLinus Torvalds jffs2_complete_reservation(c); 4721da177e4SLinus Torvalds return PTR_ERR(fn); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4751da177e4SLinus Torvalds obsoleted by the first data write 4761da177e4SLinus Torvalds */ 4771da177e4SLinus Torvalds f->metadata = fn; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds up(&f->sem); 4801da177e4SLinus Torvalds jffs2_complete_reservation(c); 4811da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds if (ret) { 4841da177e4SLinus Torvalds /* Eep. */ 4851da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4861da177e4SLinus Torvalds return ret; 4871da177e4SLinus Torvalds } 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4901da177e4SLinus Torvalds if (!rd) { 4911da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4921da177e4SLinus Torvalds jffs2_complete_reservation(c); 4931da177e4SLinus Torvalds return -ENOMEM; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds down(&dir_f->sem); 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4991da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5001da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5011da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5041da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5051da177e4SLinus Torvalds rd->ino = ri->ino; 5061da177e4SLinus Torvalds rd->mctime = ri->ctime; 5071da177e4SLinus Torvalds rd->nsize = namelen; 5081da177e4SLinus Torvalds rd->type = DT_REG; 5091da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5101da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds if (IS_ERR(fd)) { 5171da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5181da177e4SLinus Torvalds as if it were the final unlink() */ 5191da177e4SLinus Torvalds jffs2_complete_reservation(c); 5201da177e4SLinus Torvalds up(&dir_f->sem); 5211da177e4SLinus Torvalds return PTR_ERR(fd); 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5251da177e4SLinus Torvalds one if necessary. */ 5261da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds jffs2_complete_reservation(c); 5291da177e4SLinus Torvalds up(&dir_f->sem); 5301da177e4SLinus Torvalds 5311da177e4SLinus Torvalds return 0; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5363a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5373a69e0cdSArtem B. Bityutskiy uint32_t time) 5381da177e4SLinus Torvalds { 5391da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5401da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5411da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 5421da177e4SLinus Torvalds int ret; 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds if (1 /* alternative branch needs testing */ || 5451da177e4SLinus Torvalds !jffs2_can_mark_obsolete(c)) { 5461da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5491da177e4SLinus Torvalds if (!rd) 5501da177e4SLinus Torvalds return -ENOMEM; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_DELETION); 5531da177e4SLinus Torvalds if (ret) { 5541da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5551da177e4SLinus Torvalds return ret; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds down(&dir_f->sem); 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* Build a deletion node */ 5611da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5621da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5631da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5641da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5671da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5681da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5693a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5701da177e4SLinus Torvalds rd->nsize = namelen; 5711da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5721da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5731da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION); 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds if (IS_ERR(fd)) { 5801da177e4SLinus Torvalds jffs2_complete_reservation(c); 5811da177e4SLinus Torvalds up(&dir_f->sem); 5821da177e4SLinus Torvalds return PTR_ERR(fd); 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5861da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5871da177e4SLinus Torvalds up(&dir_f->sem); 5881da177e4SLinus Torvalds } else { 5891da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 5901da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds down(&dir_f->sem); 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 5951da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 5961da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 5971da177e4SLinus Torvalds !(*prev)->name[namelen]) { 5981da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 6011da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds *prev = this->next; 6041da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 6051da177e4SLinus Torvalds jffs2_free_full_dirent(this); 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds prev = &((*prev)->next); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds up(&dir_f->sem); 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 6141da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 6151da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 6161da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds down(&dead_f->sem); 6191da177e4SLinus Torvalds 62032f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 6211da177e4SLinus Torvalds while (dead_f->dents) { 6221da177e4SLinus Torvalds /* There can be only deleted ones */ 6231da177e4SLinus Torvalds fd = dead_f->dents; 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds dead_f->dents = fd->next; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds if (fd->ino) { 6281da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6291da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6301da177e4SLinus Torvalds } else { 63132f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 63232f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6351da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6361da177e4SLinus Torvalds } 63732f1a95dSArtem B. Bityuckiy } 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds dead_f->inocache->nlink--; 6401da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6411da177e4SLinus Torvalds up(&dead_f->sem); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds jffs2_complete_reservation(c); 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds return 0; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds 6503a69e0cdSArtem 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) 6511da177e4SLinus Torvalds { 6521da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6531da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6541da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 6551da177e4SLinus Torvalds int ret; 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6581da177e4SLinus Torvalds if (!rd) 6591da177e4SLinus Torvalds return -ENOMEM; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 6621da177e4SLinus Torvalds if (ret) { 6631da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6641da177e4SLinus Torvalds return ret; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds down(&dir_f->sem); 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds /* Build a deletion node */ 6701da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6711da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6721da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6731da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6761da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6771da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6783a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6791da177e4SLinus Torvalds rd->nsize = namelen; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds rd->type = type; 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6841da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds if (IS_ERR(fd)) { 6911da177e4SLinus Torvalds jffs2_complete_reservation(c); 6921da177e4SLinus Torvalds up(&dir_f->sem); 6931da177e4SLinus Torvalds return PTR_ERR(fd); 6941da177e4SLinus Torvalds } 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 6971da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds jffs2_complete_reservation(c); 7001da177e4SLinus Torvalds up(&dir_f->sem); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds return 0; 7031da177e4SLinus Torvalds } 704