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 * 101da177e4SLinus Torvalds * $Id: write.c,v 1.87 2004/11/16 20:36:12 dwmw2 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->ino = ++c->highest_ino; 391da177e4SLinus Torvalds f->inocache->state = INO_STATE_PRESENT; 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); 441da177e4SLinus Torvalds jffs2_add_ino_cache(c, f->inocache); 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 471da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 481da177e4SLinus Torvalds ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); 491da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 501da177e4SLinus Torvalds ri->mode = cpu_to_jemode(mode); 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds f->highest_version = 1; 531da177e4SLinus Torvalds ri->version = cpu_to_je32(f->highest_version); 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds return 0; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds #if CONFIG_JFFS2_FS_DEBUG > 0 591da177e4SLinus Torvalds static void writecheck(struct jffs2_sb_info *c, uint32_t ofs) 601da177e4SLinus Torvalds { 611da177e4SLinus Torvalds unsigned char buf[16]; 621da177e4SLinus Torvalds size_t retlen; 631da177e4SLinus Torvalds int ret, i; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds ret = jffs2_flash_read(c, ofs, 16, &retlen, buf); 661da177e4SLinus Torvalds if (ret || (retlen != 16)) { 671da177e4SLinus Torvalds D1(printk(KERN_DEBUG "read failed or short in writecheck(). ret %d, retlen %zd\n", ret, retlen)); 681da177e4SLinus Torvalds return; 691da177e4SLinus Torvalds } 701da177e4SLinus Torvalds ret = 0; 711da177e4SLinus Torvalds for (i=0; i<16; i++) { 721da177e4SLinus Torvalds if (buf[i] != 0xff) 731da177e4SLinus Torvalds ret = 1; 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds if (ret) { 761da177e4SLinus Torvalds printk(KERN_WARNING "ARGH. About to write node to 0x%08x on flash, but there are data already there:\n", ofs); 771da177e4SLinus Torvalds printk(KERN_WARNING "0x%08x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 781da177e4SLinus Torvalds ofs, 791da177e4SLinus Torvalds buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], 801da177e4SLinus Torvalds buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]); 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds #endif 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, 871da177e4SLinus Torvalds write it to the flash, link it into the existing inode/fragment list */ 881da177e4SLinus Torvalds 891da177e4SLinus 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) 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds { 921da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 931da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 941da177e4SLinus Torvalds size_t retlen; 951da177e4SLinus Torvalds struct kvec vecs[2]; 961da177e4SLinus Torvalds int ret; 971da177e4SLinus Torvalds int retried = 0; 981da177e4SLinus Torvalds unsigned long cnt = 2; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { 1011da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); 1021da177e4SLinus Torvalds BUG(); 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds ); 1051da177e4SLinus Torvalds vecs[0].iov_base = ri; 1061da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*ri); 1071da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)data; 1081da177e4SLinus Torvalds vecs[1].iov_len = datalen; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds D1(writecheck(c, flash_ofs)); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { 1131da177e4SLinus 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); 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 1161da177e4SLinus Torvalds if (!raw) 1171da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds fn = jffs2_alloc_full_dnode(); 1201da177e4SLinus Torvalds if (!fn) { 1211da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1221da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1231da177e4SLinus Torvalds } 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds fn->ofs = je32_to_cpu(ri->offset); 1261da177e4SLinus Torvalds fn->size = je32_to_cpu(ri->dsize); 1271da177e4SLinus Torvalds fn->frags = 0; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* check number of valid vecs */ 1301da177e4SLinus Torvalds if (!datalen || !data) 1311da177e4SLinus Torvalds cnt = 1; 1321da177e4SLinus Torvalds retry: 1331da177e4SLinus Torvalds fn->raw = raw; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 1361da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*ri)+datalen); 1371da177e4SLinus Torvalds raw->next_phys = NULL; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, 1401da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:f->inocache->ino); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds if (ret || (retlen != sizeof(*ri) + datalen)) { 1431da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 1441da177e4SLinus Torvalds sizeof(*ri)+datalen, flash_ofs, ret, retlen); 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds /* Mark the space as dirtied */ 1471da177e4SLinus Torvalds if (retlen) { 1481da177e4SLinus Torvalds /* Doesn't belong to any inode */ 1491da177e4SLinus Torvalds raw->next_in_ino = NULL; 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds /* Don't change raw->size to match retlen. We may have 1521da177e4SLinus Torvalds written the node header already, and only the data will 1531da177e4SLinus Torvalds seem corrupted, in which case the scan would skip over 1541da177e4SLinus Torvalds any node we write before the original intended end of 1551da177e4SLinus Torvalds this node */ 1561da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 1571da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 1581da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 1591da177e4SLinus Torvalds } else { 1601da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 1611da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { 1641da177e4SLinus Torvalds /* Try to reallocate space and retry */ 1651da177e4SLinus Torvalds uint32_t dummy; 1661da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds retried = 1; 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 1731da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 1761da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, &dummy); 1771da177e4SLinus Torvalds } else { 1781da177e4SLinus Torvalds /* Locking pain */ 1791da177e4SLinus Torvalds up(&f->sem); 1801da177e4SLinus Torvalds jffs2_complete_reservation(c); 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, &dummy, alloc_mode); 1831da177e4SLinus Torvalds down(&f->sem); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds if (!ret) { 1871da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 1901da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds goto retry; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 1951da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 1981da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 1991da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds /* Mark the space used */ 2021da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 2031da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 2041da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 2051da177e4SLinus Torvalds */ 2061da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 2071da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 2081da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 2091da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 2101da177e4SLinus Torvalds } else { 2111da177e4SLinus Torvalds raw->flash_offset |= REF_NORMAL; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds /* Link into per-inode list */ 2161da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 2171da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 2181da177e4SLinus Torvalds f->inocache->nodes = raw; 2191da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2201da177e4SLinus Torvalds 2211da177e4SLinus 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", 2221da177e4SLinus Torvalds flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), 2231da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 2241da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds if (retried) { 2271da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,NULL); 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds return fn; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds 2331da177e4SLinus 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) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2361da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2371da177e4SLinus Torvalds size_t retlen; 2381da177e4SLinus Torvalds struct kvec vecs[2]; 2391da177e4SLinus Torvalds int retried = 0; 2401da177e4SLinus Torvalds int ret; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2431da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2441da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 2451da177e4SLinus Torvalds D1(writecheck(c, flash_ofs)); 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2481da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2491da177e4SLinus Torvalds BUG(); 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds ); 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds vecs[0].iov_base = rd; 2541da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2551da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2561da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds if (!raw) 2611da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2641da177e4SLinus Torvalds if (!fd) { 2651da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2661da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2701da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2711da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2721da177e4SLinus Torvalds fd->type = rd->type; 2731da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2741da177e4SLinus Torvalds fd->name[namelen]=0; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds retry: 2771da177e4SLinus Torvalds fd->raw = raw; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 2801da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*rd)+namelen); 2811da177e4SLinus Torvalds raw->next_phys = NULL; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2841da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2851da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2861da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2871da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2881da177e4SLinus Torvalds /* Mark the space as dirtied */ 2891da177e4SLinus Torvalds if (retlen) { 2901da177e4SLinus Torvalds raw->next_in_ino = NULL; 2911da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 2921da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 2931da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 2941da177e4SLinus Torvalds } else { 2951da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 2961da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds if (!retried && (raw = jffs2_alloc_raw_node_ref())) { 2991da177e4SLinus Torvalds /* Try to reallocate space and retry */ 3001da177e4SLinus Torvalds uint32_t dummy; 3011da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds retried = 1; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 3081da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 3111da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, &dummy); 3121da177e4SLinus Torvalds } else { 3131da177e4SLinus Torvalds /* Locking pain */ 3141da177e4SLinus Torvalds up(&f->sem); 3151da177e4SLinus Torvalds jffs2_complete_reservation(c); 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, &dummy, alloc_mode); 3181da177e4SLinus Torvalds down(&f->sem); 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds if (!ret) { 3221da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 3231da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 3241da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 3251da177e4SLinus Torvalds goto retry; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 3281da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3311da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3321da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds /* Mark the space used */ 3351da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 3361da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3391da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 3401da177e4SLinus Torvalds f->inocache->nodes = raw; 3411da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds if (retried) { 3441da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,NULL); 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds return fd; 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3511da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3521da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3531da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3541da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3551da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3561da177e4SLinus Torvalds { 3571da177e4SLinus Torvalds int ret = 0; 3581da177e4SLinus Torvalds uint32_t writtenlen = 0; 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3611da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds while(writelen) { 3641da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3651da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3661da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3671da177e4SLinus Torvalds uint32_t phys_ofs, alloclen; 3681da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3691da177e4SLinus Torvalds int retried = 0; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds retry: 3721da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, &alloclen, ALLOC_NORMAL); 3751da177e4SLinus Torvalds if (ret) { 3761da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3771da177e4SLinus Torvalds break; 3781da177e4SLinus Torvalds } 3791da177e4SLinus Torvalds down(&f->sem); 3801da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3811da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3861da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3871da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3881da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3911da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3921da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3931da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3941da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3951da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3961da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3971da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3981da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3991da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds if (IS_ERR(fn)) { 4061da177e4SLinus Torvalds ret = PTR_ERR(fn); 4071da177e4SLinus Torvalds up(&f->sem); 4081da177e4SLinus Torvalds jffs2_complete_reservation(c); 4091da177e4SLinus Torvalds if (!retried) { 4101da177e4SLinus Torvalds /* Write error to be retried */ 4111da177e4SLinus Torvalds retried = 1; 4121da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 4131da177e4SLinus Torvalds goto retry; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds break; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 4181da177e4SLinus Torvalds if (f->metadata) { 4191da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 4201da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 4211da177e4SLinus Torvalds f->metadata = NULL; 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds if (ret) { 4241da177e4SLinus Torvalds /* Eep */ 4251da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 4261da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4271da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds up(&f->sem); 4301da177e4SLinus Torvalds jffs2_complete_reservation(c); 4311da177e4SLinus Torvalds break; 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds up(&f->sem); 4341da177e4SLinus Torvalds jffs2_complete_reservation(c); 4351da177e4SLinus Torvalds if (!datalen) { 4361da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4371da177e4SLinus Torvalds ret = -EIO; 4381da177e4SLinus Torvalds break; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4411da177e4SLinus Torvalds writtenlen += datalen; 4421da177e4SLinus Torvalds offset += datalen; 4431da177e4SLinus Torvalds writelen -= datalen; 4441da177e4SLinus Torvalds buf += datalen; 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds *retlen = writtenlen; 4471da177e4SLinus Torvalds return ret; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus 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) 4511da177e4SLinus Torvalds { 4521da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4531da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4541da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4551da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 4561da177e4SLinus Torvalds int ret; 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4591da177e4SLinus Torvalds * Just the node will do for now, though 4601da177e4SLinus Torvalds */ 4611da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); 4621da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4631da177e4SLinus Torvalds if (ret) { 4641da177e4SLinus Torvalds up(&f->sem); 4651da177e4SLinus Torvalds return ret; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4691da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4741da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds if (IS_ERR(fn)) { 4771da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4781da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4791da177e4SLinus Torvalds up(&f->sem); 4801da177e4SLinus Torvalds jffs2_complete_reservation(c); 4811da177e4SLinus Torvalds return PTR_ERR(fn); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4841da177e4SLinus Torvalds obsoleted by the first data write 4851da177e4SLinus Torvalds */ 4861da177e4SLinus Torvalds f->metadata = fn; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds up(&f->sem); 4891da177e4SLinus Torvalds jffs2_complete_reservation(c); 4901da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds if (ret) { 4931da177e4SLinus Torvalds /* Eep. */ 4941da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4951da177e4SLinus Torvalds return ret; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4991da177e4SLinus Torvalds if (!rd) { 5001da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 5011da177e4SLinus Torvalds jffs2_complete_reservation(c); 5021da177e4SLinus Torvalds return -ENOMEM; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds down(&dir_f->sem); 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5081da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5091da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5101da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5131da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5141da177e4SLinus Torvalds rd->ino = ri->ino; 5151da177e4SLinus Torvalds rd->mctime = ri->ctime; 5161da177e4SLinus Torvalds rd->nsize = namelen; 5171da177e4SLinus Torvalds rd->type = DT_REG; 5181da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5191da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds if (IS_ERR(fd)) { 5261da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5271da177e4SLinus Torvalds as if it were the final unlink() */ 5281da177e4SLinus Torvalds jffs2_complete_reservation(c); 5291da177e4SLinus Torvalds up(&dir_f->sem); 5301da177e4SLinus Torvalds return PTR_ERR(fd); 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5341da177e4SLinus Torvalds one if necessary. */ 5351da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds jffs2_complete_reservation(c); 5381da177e4SLinus Torvalds up(&dir_f->sem); 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds return 0; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5451da177e4SLinus Torvalds const char *name, int namelen, struct jffs2_inode_info *dead_f) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5481da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5491da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 5501da177e4SLinus Torvalds int ret; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds if (1 /* alternative branch needs testing */ || 5531da177e4SLinus Torvalds !jffs2_can_mark_obsolete(c)) { 5541da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5571da177e4SLinus Torvalds if (!rd) 5581da177e4SLinus Torvalds return -ENOMEM; 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_DELETION); 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); 5771da177e4SLinus Torvalds rd->mctime = cpu_to_je32(get_seconds()); 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 6281da177e4SLinus Torvalds while (dead_f->dents) { 6291da177e4SLinus Torvalds /* There can be only deleted ones */ 6301da177e4SLinus Torvalds fd = dead_f->dents; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds dead_f->dents = fd->next; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds if (fd->ino) { 6351da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6361da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6371da177e4SLinus Torvalds } else { 6381da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", fd->name, dead_f->inocache->ino)); 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6411da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds dead_f->inocache->nlink--; 6451da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6461da177e4SLinus Torvalds up(&dead_f->sem); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds jffs2_complete_reservation(c); 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds return 0; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds 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) 6561da177e4SLinus Torvalds { 6571da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6581da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6591da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 6601da177e4SLinus Torvalds int ret; 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6631da177e4SLinus Torvalds if (!rd) 6641da177e4SLinus Torvalds return -ENOMEM; 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 6671da177e4SLinus Torvalds if (ret) { 6681da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6691da177e4SLinus Torvalds return ret; 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds down(&dir_f->sem); 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* Build a deletion node */ 6751da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6761da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6771da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6781da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6811da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6821da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6831da177e4SLinus Torvalds rd->mctime = cpu_to_je32(get_seconds()); 6841da177e4SLinus Torvalds rd->nsize = namelen; 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds rd->type = type; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6891da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds if (IS_ERR(fd)) { 6961da177e4SLinus Torvalds jffs2_complete_reservation(c); 6971da177e4SLinus Torvalds up(&dir_f->sem); 6981da177e4SLinus Torvalds return PTR_ERR(fd); 6991da177e4SLinus Torvalds } 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 7021da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds jffs2_complete_reservation(c); 7051da177e4SLinus Torvalds up(&dir_f->sem); 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds return 0; 7081da177e4SLinus Torvalds } 709