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 * 107d200960SDavid Woodhouse * $Id: write.c,v 1.92 2005/04/13 13:22:35 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->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 #if CONFIG_JFFS2_FS_DEBUG > 0 581da177e4SLinus Torvalds static void writecheck(struct jffs2_sb_info *c, uint32_t ofs) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds unsigned char buf[16]; 611da177e4SLinus Torvalds size_t retlen; 621da177e4SLinus Torvalds int ret, i; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds ret = jffs2_flash_read(c, ofs, 16, &retlen, buf); 651da177e4SLinus Torvalds if (ret || (retlen != 16)) { 661da177e4SLinus Torvalds D1(printk(KERN_DEBUG "read failed or short in writecheck(). ret %d, retlen %zd\n", ret, retlen)); 671da177e4SLinus Torvalds return; 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds ret = 0; 701da177e4SLinus Torvalds for (i=0; i<16; i++) { 711da177e4SLinus Torvalds if (buf[i] != 0xff) 721da177e4SLinus Torvalds ret = 1; 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds if (ret) { 751da177e4SLinus Torvalds printk(KERN_WARNING "ARGH. About to write node to 0x%08x on flash, but there are data already there:\n", ofs); 761da177e4SLinus Torvalds printk(KERN_WARNING "0x%08x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 771da177e4SLinus Torvalds ofs, 781da177e4SLinus Torvalds buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], 791da177e4SLinus Torvalds buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]); 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds #endif 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, 861da177e4SLinus Torvalds write it to the flash, link it into the existing inode/fragment list */ 871da177e4SLinus Torvalds 881da177e4SLinus 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) 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 921da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 931da177e4SLinus Torvalds size_t retlen; 941da177e4SLinus Torvalds struct kvec vecs[2]; 951da177e4SLinus Torvalds int ret; 961da177e4SLinus Torvalds int retried = 0; 971da177e4SLinus Torvalds unsigned long cnt = 2; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { 1001da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); 1011da177e4SLinus Torvalds BUG(); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds ); 1041da177e4SLinus Torvalds vecs[0].iov_base = ri; 1051da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*ri); 1061da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)data; 1071da177e4SLinus Torvalds vecs[1].iov_len = datalen; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds D1(writecheck(c, flash_ofs)); 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { 1121da177e4SLinus 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); 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 1151da177e4SLinus Torvalds if (!raw) 1161da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds fn = jffs2_alloc_full_dnode(); 1191da177e4SLinus Torvalds if (!fn) { 1201da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1211da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds fn->ofs = je32_to_cpu(ri->offset); 1251da177e4SLinus Torvalds fn->size = je32_to_cpu(ri->dsize); 1261da177e4SLinus Torvalds fn->frags = 0; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds /* check number of valid vecs */ 1291da177e4SLinus Torvalds if (!datalen || !data) 1301da177e4SLinus Torvalds cnt = 1; 1311da177e4SLinus Torvalds retry: 1321da177e4SLinus Torvalds fn->raw = raw; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 1351da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*ri)+datalen); 1361da177e4SLinus Torvalds raw->next_phys = NULL; 1371da177e4SLinus Torvalds 1389b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { 1399b88f473SEstelle Hammache BUG_ON(!retried); 1409b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " 1419b88f473SEstelle Hammache "highest version %d -> updating dnode\n", 142e4803c30SEstelle Hammache je32_to_cpu(ri->version), f->highest_version)); 143e4803c30SEstelle Hammache ri->version = cpu_to_je32(++f->highest_version); 144e4803c30SEstelle Hammache ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 145e4803c30SEstelle Hammache } 146e4803c30SEstelle Hammache 1471da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, 1481da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:f->inocache->ino); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds if (ret || (retlen != sizeof(*ri) + datalen)) { 1511da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 1521da177e4SLinus Torvalds sizeof(*ri)+datalen, flash_ofs, ret, retlen); 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds /* Mark the space as dirtied */ 1551da177e4SLinus Torvalds if (retlen) { 1561da177e4SLinus Torvalds /* Doesn't belong to any inode */ 1571da177e4SLinus Torvalds raw->next_in_ino = NULL; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* Don't change raw->size to match retlen. We may have 1601da177e4SLinus Torvalds written the node header already, and only the data will 1611da177e4SLinus Torvalds seem corrupted, in which case the scan would skip over 1621da177e4SLinus Torvalds any node we write before the original intended end of 1631da177e4SLinus Torvalds this node */ 1641da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 1651da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 1661da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 1671da177e4SLinus Torvalds } else { 1681da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 1691da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { 1721da177e4SLinus Torvalds /* Try to reallocate space and retry */ 1731da177e4SLinus Torvalds uint32_t dummy; 1741da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds retried = 1; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 1811da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 1841da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, &dummy); 1851da177e4SLinus Torvalds } else { 1861da177e4SLinus Torvalds /* Locking pain */ 1871da177e4SLinus Torvalds up(&f->sem); 1881da177e4SLinus Torvalds jffs2_complete_reservation(c); 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, &dummy, alloc_mode); 1911da177e4SLinus Torvalds down(&f->sem); 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds if (!ret) { 1951da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 1981da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds goto retry; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 2031da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 2061da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 2071da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds /* Mark the space used */ 2101da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 2111da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 2121da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 2131da177e4SLinus Torvalds */ 2141da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 2151da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 2161da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 2171da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 2181da177e4SLinus Torvalds } else { 2191da177e4SLinus Torvalds raw->flash_offset |= REF_NORMAL; 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* Link into per-inode list */ 2241da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 2251da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 2261da177e4SLinus Torvalds f->inocache->nodes = raw; 2271da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2281da177e4SLinus Torvalds 2291da177e4SLinus 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", 2301da177e4SLinus Torvalds flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), 2311da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 2321da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds if (retried) { 2351da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,NULL); 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds return fn; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus 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) 2421da177e4SLinus Torvalds { 2431da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2441da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2451da177e4SLinus Torvalds size_t retlen; 2461da177e4SLinus Torvalds struct kvec vecs[2]; 2471da177e4SLinus Torvalds int retried = 0; 2481da177e4SLinus Torvalds int ret; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2511da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2521da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 2531da177e4SLinus Torvalds D1(writecheck(c, flash_ofs)); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2561da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2571da177e4SLinus Torvalds BUG(); 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds ); 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds vecs[0].iov_base = rd; 2621da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2631da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2641da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds raw = jffs2_alloc_raw_node_ref(); 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds if (!raw) 2691da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2721da177e4SLinus Torvalds if (!fd) { 2731da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 2741da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2781da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2791da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2801da177e4SLinus Torvalds fd->type = rd->type; 2811da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2821da177e4SLinus Torvalds fd->name[namelen]=0; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds retry: 2851da177e4SLinus Torvalds fd->raw = raw; 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds raw->flash_offset = flash_ofs; 2881da177e4SLinus Torvalds raw->__totlen = PAD(sizeof(*rd)+namelen); 2891da177e4SLinus Torvalds raw->next_phys = NULL; 2901da177e4SLinus Torvalds 2919b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2929b88f473SEstelle Hammache BUG_ON(!retried); 2939b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2949b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 295e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 296e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 297e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 298e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 299e4803c30SEstelle Hammache } 300e4803c30SEstelle Hammache 3011da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 3021da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 3031da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 3041da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 3051da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 3061da177e4SLinus Torvalds /* Mark the space as dirtied */ 3071da177e4SLinus Torvalds if (retlen) { 3081da177e4SLinus Torvalds raw->next_in_ino = NULL; 3091da177e4SLinus Torvalds raw->flash_offset |= REF_OBSOLETE; 3101da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 3111da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, raw); 3121da177e4SLinus Torvalds } else { 3131da177e4SLinus Torvalds printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); 3141da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds if (!retried && (raw = jffs2_alloc_raw_node_ref())) { 3171da177e4SLinus Torvalds /* Try to reallocate space and retry */ 3181da177e4SLinus Torvalds uint32_t dummy; 3191da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds retried = 1; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 3261da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 3291da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, &dummy); 3301da177e4SLinus Torvalds } else { 3311da177e4SLinus Torvalds /* Locking pain */ 3321da177e4SLinus Torvalds up(&f->sem); 3331da177e4SLinus Torvalds jffs2_complete_reservation(c); 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, &dummy, alloc_mode); 3361da177e4SLinus Torvalds down(&f->sem); 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds if (!ret) { 3401da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 3411da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 3421da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 3431da177e4SLinus Torvalds goto retry; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 3461da177e4SLinus Torvalds jffs2_free_raw_node_ref(raw); 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3491da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3501da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds /* Mark the space used */ 3531da177e4SLinus Torvalds raw->flash_offset |= REF_PRISTINE; 3541da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw); 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3571da177e4SLinus Torvalds raw->next_in_ino = f->inocache->nodes; 3581da177e4SLinus Torvalds f->inocache->nodes = raw; 3591da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds if (retried) { 3621da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,NULL); 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds return fd; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3691da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3701da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3711da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3721da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3731da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3741da177e4SLinus Torvalds { 3751da177e4SLinus Torvalds int ret = 0; 3761da177e4SLinus Torvalds uint32_t writtenlen = 0; 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3791da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds while(writelen) { 3821da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3831da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3841da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3851da177e4SLinus Torvalds uint32_t phys_ofs, alloclen; 3861da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3871da177e4SLinus Torvalds int retried = 0; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds retry: 3901da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, &alloclen, ALLOC_NORMAL); 3931da177e4SLinus Torvalds if (ret) { 3941da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3951da177e4SLinus Torvalds break; 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds down(&f->sem); 3981da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3991da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4041da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 4051da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 4061da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 4091da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 4101da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 4111da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 4121da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 4131da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 4141da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 4151da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 4161da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4171da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds if (IS_ERR(fn)) { 4241da177e4SLinus Torvalds ret = PTR_ERR(fn); 4251da177e4SLinus Torvalds up(&f->sem); 4261da177e4SLinus Torvalds jffs2_complete_reservation(c); 4271da177e4SLinus Torvalds if (!retried) { 4281da177e4SLinus Torvalds /* Write error to be retried */ 4291da177e4SLinus Torvalds retried = 1; 4301da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 4311da177e4SLinus Torvalds goto retry; 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds break; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 4361da177e4SLinus Torvalds if (f->metadata) { 4371da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 4381da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 4391da177e4SLinus Torvalds f->metadata = NULL; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds if (ret) { 4421da177e4SLinus Torvalds /* Eep */ 4431da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 4441da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4451da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds up(&f->sem); 4481da177e4SLinus Torvalds jffs2_complete_reservation(c); 4491da177e4SLinus Torvalds break; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds up(&f->sem); 4521da177e4SLinus Torvalds jffs2_complete_reservation(c); 4531da177e4SLinus Torvalds if (!datalen) { 4541da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4551da177e4SLinus Torvalds ret = -EIO; 4561da177e4SLinus Torvalds break; 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4591da177e4SLinus Torvalds writtenlen += datalen; 4601da177e4SLinus Torvalds offset += datalen; 4611da177e4SLinus Torvalds writelen -= datalen; 4621da177e4SLinus Torvalds buf += datalen; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds *retlen = writtenlen; 4651da177e4SLinus Torvalds return ret; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds 4681da177e4SLinus 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) 4691da177e4SLinus Torvalds { 4701da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4711da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4721da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4731da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 4741da177e4SLinus Torvalds int ret; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4771da177e4SLinus Torvalds * Just the node will do for now, though 4781da177e4SLinus Torvalds */ 4791da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); 4801da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4811da177e4SLinus Torvalds if (ret) { 4821da177e4SLinus Torvalds up(&f->sem); 4831da177e4SLinus Torvalds return ret; 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4871da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4921da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds if (IS_ERR(fn)) { 4951da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4961da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4971da177e4SLinus Torvalds up(&f->sem); 4981da177e4SLinus Torvalds jffs2_complete_reservation(c); 4991da177e4SLinus Torvalds return PTR_ERR(fn); 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 5021da177e4SLinus Torvalds obsoleted by the first data write 5031da177e4SLinus Torvalds */ 5041da177e4SLinus Torvalds f->metadata = fn; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds up(&f->sem); 5071da177e4SLinus Torvalds jffs2_complete_reservation(c); 5081da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds if (ret) { 5111da177e4SLinus Torvalds /* Eep. */ 5121da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 5131da177e4SLinus Torvalds return ret; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5171da177e4SLinus Torvalds if (!rd) { 5181da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 5191da177e4SLinus Torvalds jffs2_complete_reservation(c); 5201da177e4SLinus Torvalds return -ENOMEM; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds down(&dir_f->sem); 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5261da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5271da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5281da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5311da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5321da177e4SLinus Torvalds rd->ino = ri->ino; 5331da177e4SLinus Torvalds rd->mctime = ri->ctime; 5341da177e4SLinus Torvalds rd->nsize = namelen; 5351da177e4SLinus Torvalds rd->type = DT_REG; 5361da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5371da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds if (IS_ERR(fd)) { 5441da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5451da177e4SLinus Torvalds as if it were the final unlink() */ 5461da177e4SLinus Torvalds jffs2_complete_reservation(c); 5471da177e4SLinus Torvalds up(&dir_f->sem); 5481da177e4SLinus Torvalds return PTR_ERR(fd); 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5521da177e4SLinus Torvalds one if necessary. */ 5531da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds jffs2_complete_reservation(c); 5561da177e4SLinus Torvalds up(&dir_f->sem); 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds return 0; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5631da177e4SLinus Torvalds const char *name, int namelen, struct jffs2_inode_info *dead_f) 5641da177e4SLinus Torvalds { 5651da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5661da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5671da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 5681da177e4SLinus Torvalds int ret; 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds if (1 /* alternative branch needs testing */ || 5711da177e4SLinus Torvalds !jffs2_can_mark_obsolete(c)) { 5721da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5751da177e4SLinus Torvalds if (!rd) 5761da177e4SLinus Torvalds return -ENOMEM; 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_DELETION); 5791da177e4SLinus Torvalds if (ret) { 5801da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5811da177e4SLinus Torvalds return ret; 5821da177e4SLinus Torvalds } 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds down(&dir_f->sem); 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds /* Build a deletion node */ 5871da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5881da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5891da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5901da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5931da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5941da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5951da177e4SLinus Torvalds rd->mctime = cpu_to_je32(get_seconds()); 5961da177e4SLinus Torvalds rd->nsize = namelen; 5971da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5981da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5991da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION); 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds if (IS_ERR(fd)) { 6061da177e4SLinus Torvalds jffs2_complete_reservation(c); 6071da177e4SLinus Torvalds up(&dir_f->sem); 6081da177e4SLinus Torvalds return PTR_ERR(fd); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 6121da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 6131da177e4SLinus Torvalds up(&dir_f->sem); 6141da177e4SLinus Torvalds } else { 6151da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 6161da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds down(&dir_f->sem); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 6211da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 6221da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 6231da177e4SLinus Torvalds !(*prev)->name[namelen]) { 6241da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 6271da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds *prev = this->next; 6301da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 6311da177e4SLinus Torvalds jffs2_free_full_dirent(this); 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds prev = &((*prev)->next); 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds up(&dir_f->sem); 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 6401da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 6411da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 6421da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds down(&dead_f->sem); 6451da177e4SLinus Torvalds 64632f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 6471da177e4SLinus Torvalds while (dead_f->dents) { 6481da177e4SLinus Torvalds /* There can be only deleted ones */ 6491da177e4SLinus Torvalds fd = dead_f->dents; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds dead_f->dents = fd->next; 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds if (fd->ino) { 6541da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6551da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6561da177e4SLinus Torvalds } else { 65732f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 65832f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6611da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6621da177e4SLinus Torvalds } 66332f1a95dSArtem B. Bityuckiy } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds dead_f->inocache->nlink--; 6661da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6671da177e4SLinus Torvalds up(&dead_f->sem); 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds jffs2_complete_reservation(c); 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds return 0; 6731da177e4SLinus Torvalds } 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds 6761da177e4SLinus 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) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6791da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6801da177e4SLinus Torvalds uint32_t alloclen, phys_ofs; 6811da177e4SLinus Torvalds int ret; 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6841da177e4SLinus Torvalds if (!rd) 6851da177e4SLinus Torvalds return -ENOMEM; 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 6881da177e4SLinus Torvalds if (ret) { 6891da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6901da177e4SLinus Torvalds return ret; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds down(&dir_f->sem); 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds /* Build a deletion node */ 6961da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6971da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6981da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6991da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 7021da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 7031da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 7041da177e4SLinus Torvalds rd->mctime = cpu_to_je32(get_seconds()); 7051da177e4SLinus Torvalds rd->nsize = namelen; 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds rd->type = type; 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 7101da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds if (IS_ERR(fd)) { 7171da177e4SLinus Torvalds jffs2_complete_reservation(c); 7181da177e4SLinus Torvalds up(&dir_f->sem); 7191da177e4SLinus Torvalds return PTR_ERR(fd); 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 7231da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds jffs2_complete_reservation(c); 7261da177e4SLinus Torvalds up(&dir_f->sem); 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds return 0; 7291da177e4SLinus Torvalds } 730