11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 4c00c310eSDavid Woodhouse * Copyright © 2001-2007 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 */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/fs.h> 141da177e4SLinus Torvalds #include <linux/crc32.h> 151da177e4SLinus Torvalds #include <linux/slab.h> 161da177e4SLinus Torvalds #include <linux/pagemap.h> 171da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 181da177e4SLinus Torvalds #include "nodelist.h" 191da177e4SLinus Torvalds #include "compr.h" 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri) 231da177e4SLinus Torvalds { 241da177e4SLinus Torvalds struct jffs2_inode_cache *ic; 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds ic = jffs2_alloc_inode_cache(); 271da177e4SLinus Torvalds if (!ic) { 281da177e4SLinus Torvalds return -ENOMEM; 291da177e4SLinus Torvalds } 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds memset(ic, 0, sizeof(*ic)); 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds f->inocache = ic; 341da177e4SLinus Torvalds f->inocache->nlink = 1; 351da177e4SLinus Torvalds f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; 361da177e4SLinus Torvalds f->inocache->state = INO_STATE_PRESENT; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds jffs2_add_ino_cache(c, f->inocache); 397d200960SDavid Woodhouse D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); 407d200960SDavid Woodhouse ri->ino = cpu_to_je32(f->inocache->ino); 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 431da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 441da177e4SLinus Torvalds ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); 451da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 461da177e4SLinus Torvalds ri->mode = cpu_to_jemode(mode); 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds f->highest_version = 1; 491da177e4SLinus Torvalds ri->version = cpu_to_je32(f->highest_version); 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds return 0; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, 551da177e4SLinus Torvalds write it to the flash, link it into the existing inode/fragment list */ 561da177e4SLinus Torvalds 579fe4854cSDavid Woodhouse struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 589fe4854cSDavid Woodhouse struct jffs2_raw_inode *ri, const unsigned char *data, 599fe4854cSDavid Woodhouse uint32_t datalen, int alloc_mode) 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 631da177e4SLinus Torvalds size_t retlen; 649fe4854cSDavid Woodhouse uint32_t flash_ofs; 651da177e4SLinus Torvalds struct kvec vecs[2]; 661da177e4SLinus Torvalds int ret; 671da177e4SLinus Torvalds int retried = 0; 681da177e4SLinus Torvalds unsigned long cnt = 2; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { 711da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); 721da177e4SLinus Torvalds BUG(); 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds ); 751da177e4SLinus Torvalds vecs[0].iov_base = ri; 761da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*ri); 771da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)data; 781da177e4SLinus Torvalds vecs[1].iov_len = datalen; 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { 811da177e4SLinus 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); 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds fn = jffs2_alloc_full_dnode(); 852f785402SDavid Woodhouse if (!fn) 861da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds /* check number of valid vecs */ 891da177e4SLinus Torvalds if (!datalen || !data) 901da177e4SLinus Torvalds cnt = 1; 911da177e4SLinus Torvalds retry: 922f785402SDavid Woodhouse flash_ofs = write_ofs(c); 939fe4854cSDavid Woodhouse 949fe4854cSDavid Woodhouse jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 951da177e4SLinus Torvalds 969b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { 979b88f473SEstelle Hammache BUG_ON(!retried); 989b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " 999b88f473SEstelle Hammache "highest version %d -> updating dnode\n", 100e4803c30SEstelle Hammache je32_to_cpu(ri->version), f->highest_version)); 101e4803c30SEstelle Hammache ri->version = cpu_to_je32(++f->highest_version); 102e4803c30SEstelle Hammache ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 103e4803c30SEstelle Hammache } 104e4803c30SEstelle Hammache 1051da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, 1061da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:f->inocache->ino); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds if (ret || (retlen != sizeof(*ri) + datalen)) { 1091da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 1101da177e4SLinus Torvalds sizeof(*ri)+datalen, flash_ofs, ret, retlen); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds /* Mark the space as dirtied */ 1131da177e4SLinus Torvalds if (retlen) { 1141da177e4SLinus Torvalds /* Don't change raw->size to match retlen. We may have 1151da177e4SLinus Torvalds written the node header already, and only the data will 1161da177e4SLinus Torvalds seem corrupted, in which case the scan would skip over 1171da177e4SLinus Torvalds any node we write before the original intended end of 1181da177e4SLinus Torvalds this node */ 1192f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*ri)+datalen), NULL); 1201da177e4SLinus Torvalds } else { 1212f785402SDavid Woodhouse printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); 1221da177e4SLinus Torvalds } 1232f785402SDavid Woodhouse if (!retried && alloc_mode != ALLOC_NORETRY) { 1241da177e4SLinus Torvalds /* Try to reallocate space and retry */ 1251da177e4SLinus Torvalds uint32_t dummy; 1261da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds retried = 1; 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 1311da177e4SLinus Torvalds 132730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 133730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 1369fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &dummy, 1379fe4854cSDavid Woodhouse JFFS2_SUMMARY_INODE_SIZE); 1381da177e4SLinus Torvalds } else { 1391da177e4SLinus Torvalds /* Locking pain */ 1401da177e4SLinus Torvalds up(&f->sem); 1411da177e4SLinus Torvalds jffs2_complete_reservation(c); 1421da177e4SLinus Torvalds 1439fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy, 1449fe4854cSDavid Woodhouse alloc_mode, JFFS2_SUMMARY_INODE_SIZE); 1451da177e4SLinus Torvalds down(&f->sem); 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds if (!ret) { 1499fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 1501da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 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 goto retry; 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 1601da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 1611da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds /* Mark the space used */ 1641da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 1651da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 1661da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 1671da177e4SLinus Torvalds */ 1681da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 1691da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 1701da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 1712f785402SDavid Woodhouse flash_ofs |= REF_PRISTINE; 1721da177e4SLinus Torvalds } else { 1732f785402SDavid Woodhouse flash_ofs |= REF_NORMAL; 1741da177e4SLinus Torvalds } 1752f785402SDavid Woodhouse fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache); 1762f785402SDavid Woodhouse fn->ofs = je32_to_cpu(ri->offset); 1772f785402SDavid Woodhouse fn->size = je32_to_cpu(ri->dsize); 1782f785402SDavid Woodhouse fn->frags = 0; 1791da177e4SLinus Torvalds 1801da177e4SLinus 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", 1812f785402SDavid Woodhouse flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), 1821da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 1831da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds if (retried) { 186730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds return fn; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 1929fe4854cSDavid Woodhouse struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 1939fe4854cSDavid Woodhouse struct jffs2_raw_dirent *rd, const unsigned char *name, 1949fe4854cSDavid Woodhouse uint32_t namelen, int alloc_mode) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 1971da177e4SLinus Torvalds size_t retlen; 1981da177e4SLinus Torvalds struct kvec vecs[2]; 1992f785402SDavid Woodhouse uint32_t flash_ofs; 2001da177e4SLinus Torvalds int retried = 0; 2011da177e4SLinus Torvalds int ret; 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2041da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2051da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 206730554d9SArtem B. Bityutskiy 2071da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2081da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2091da177e4SLinus Torvalds BUG(); 2102f785402SDavid Woodhouse }); 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds vecs[0].iov_base = rd; 2131da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2141da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2151da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2182f785402SDavid Woodhouse if (!fd) 2191da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2221da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2231da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2241da177e4SLinus Torvalds fd->type = rd->type; 2251da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2261da177e4SLinus Torvalds fd->name[namelen]=0; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds retry: 2292f785402SDavid Woodhouse flash_ofs = write_ofs(c); 2301da177e4SLinus Torvalds 2312f785402SDavid Woodhouse jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 2321da177e4SLinus Torvalds 2339b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2349b88f473SEstelle Hammache BUG_ON(!retried); 2359b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2369b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 237e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 238e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 239e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 240e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 241e4803c30SEstelle Hammache } 242e4803c30SEstelle Hammache 2431da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2441da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2451da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2461da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2471da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2481da177e4SLinus Torvalds /* Mark the space as dirtied */ 2491da177e4SLinus Torvalds if (retlen) { 2502f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); 2511da177e4SLinus Torvalds } else { 2522f785402SDavid Woodhouse printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); 2531da177e4SLinus Torvalds } 2542f785402SDavid Woodhouse if (!retried) { 2551da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2561da177e4SLinus Torvalds uint32_t dummy; 2571da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds retried = 1; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 2621da177e4SLinus Torvalds 263730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 264730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 2679fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, 2689fe4854cSDavid Woodhouse JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2691da177e4SLinus Torvalds } else { 2701da177e4SLinus Torvalds /* Locking pain */ 2711da177e4SLinus Torvalds up(&f->sem); 2721da177e4SLinus Torvalds jffs2_complete_reservation(c); 2731da177e4SLinus Torvalds 2749fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, 2759fe4854cSDavid Woodhouse alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2761da177e4SLinus Torvalds down(&f->sem); 2771da177e4SLinus Torvalds } 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds if (!ret) { 2809fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 2811da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 282730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 283730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2841da177e4SLinus Torvalds goto retry; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 2891da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 2901da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 2911da177e4SLinus Torvalds } 2921da177e4SLinus Torvalds /* Mark the space used */ 2932f785402SDavid Woodhouse fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | REF_PRISTINE, PAD(sizeof(*rd)+namelen), f->inocache); 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds if (retried) { 296730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds return fd; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3031da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3041da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3051da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3061da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3071da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3081da177e4SLinus Torvalds { 3091da177e4SLinus Torvalds int ret = 0; 3101da177e4SLinus Torvalds uint32_t writtenlen = 0; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3131da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds while(writelen) { 3161da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3171da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3181da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3199fe4854cSDavid Woodhouse uint32_t alloclen; 3201da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3211da177e4SLinus Torvalds int retried = 0; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds retry: 3241da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3251da177e4SLinus Torvalds 3269fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, 327e631ddbaSFerenc Havasi &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); 3281da177e4SLinus Torvalds if (ret) { 3291da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3301da177e4SLinus Torvalds break; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds down(&f->sem); 3331da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3341da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3391da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3401da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3411da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3441da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3451da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3461da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3471da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3481da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3491da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3501da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3511da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3521da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3531da177e4SLinus Torvalds 3549fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds if (IS_ERR(fn)) { 3591da177e4SLinus Torvalds ret = PTR_ERR(fn); 3601da177e4SLinus Torvalds up(&f->sem); 3611da177e4SLinus Torvalds jffs2_complete_reservation(c); 3621da177e4SLinus Torvalds if (!retried) { 3631da177e4SLinus Torvalds /* Write error to be retried */ 3641da177e4SLinus Torvalds retried = 1; 3651da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 3661da177e4SLinus Torvalds goto retry; 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds break; 3691da177e4SLinus Torvalds } 3701da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 3711da177e4SLinus Torvalds if (f->metadata) { 3721da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 3731da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 3741da177e4SLinus Torvalds f->metadata = NULL; 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds if (ret) { 3771da177e4SLinus Torvalds /* Eep */ 3781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 3791da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 3801da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds up(&f->sem); 3831da177e4SLinus Torvalds jffs2_complete_reservation(c); 3841da177e4SLinus Torvalds break; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds up(&f->sem); 3871da177e4SLinus Torvalds jffs2_complete_reservation(c); 3881da177e4SLinus Torvalds if (!datalen) { 3891da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 3901da177e4SLinus Torvalds ret = -EIO; 3911da177e4SLinus Torvalds break; 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 3941da177e4SLinus Torvalds writtenlen += datalen; 3951da177e4SLinus Torvalds offset += datalen; 3961da177e4SLinus Torvalds writelen -= datalen; 3971da177e4SLinus Torvalds buf += datalen; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds *retlen = writtenlen; 4001da177e4SLinus Torvalds return ret; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 4031da177e4SLinus 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) 4041da177e4SLinus Torvalds { 4051da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4061da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4071da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4089fe4854cSDavid Woodhouse uint32_t alloclen; 4091da177e4SLinus Torvalds int ret; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4121da177e4SLinus Torvalds * Just the node will do for now, though 4131da177e4SLinus Torvalds */ 4149fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, 415e631ddbaSFerenc Havasi JFFS2_SUMMARY_INODE_SIZE); 4161da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4171da177e4SLinus Torvalds if (ret) { 4181da177e4SLinus Torvalds up(&f->sem); 4191da177e4SLinus Torvalds return ret; 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4231da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4241da177e4SLinus Torvalds 4259fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4281da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds if (IS_ERR(fn)) { 4311da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4321da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4331da177e4SLinus Torvalds up(&f->sem); 4341da177e4SLinus Torvalds jffs2_complete_reservation(c); 4351da177e4SLinus Torvalds return PTR_ERR(fn); 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4381da177e4SLinus Torvalds obsoleted by the first data write 4391da177e4SLinus Torvalds */ 4401da177e4SLinus Torvalds f->metadata = fn; 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds up(&f->sem); 4431da177e4SLinus Torvalds jffs2_complete_reservation(c); 4449fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 445e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds if (ret) { 4481da177e4SLinus Torvalds /* Eep. */ 4491da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4501da177e4SLinus Torvalds return ret; 4511da177e4SLinus Torvalds } 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4541da177e4SLinus Torvalds if (!rd) { 4551da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4561da177e4SLinus Torvalds jffs2_complete_reservation(c); 4571da177e4SLinus Torvalds return -ENOMEM; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds down(&dir_f->sem); 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4631da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 4641da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 4651da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 4681da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 4691da177e4SLinus Torvalds rd->ino = ri->ino; 4701da177e4SLinus Torvalds rd->mctime = ri->ctime; 4711da177e4SLinus Torvalds rd->nsize = namelen; 4721da177e4SLinus Torvalds rd->type = DT_REG; 4731da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 4741da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 4751da177e4SLinus Torvalds 4769fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds if (IS_ERR(fd)) { 4811da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 4821da177e4SLinus Torvalds as if it were the final unlink() */ 4831da177e4SLinus Torvalds jffs2_complete_reservation(c); 4841da177e4SLinus Torvalds up(&dir_f->sem); 4851da177e4SLinus Torvalds return PTR_ERR(fd); 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 4891da177e4SLinus Torvalds one if necessary. */ 4901da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds jffs2_complete_reservation(c); 4931da177e4SLinus Torvalds up(&dir_f->sem); 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds return 0; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5003a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5013a69e0cdSArtem B. Bityutskiy uint32_t time) 5021da177e4SLinus Torvalds { 5031da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5041da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5059fe4854cSDavid Woodhouse uint32_t alloclen; 5061da177e4SLinus Torvalds int ret; 5071da177e4SLinus Torvalds 508a491486aSJoakim Tjernlund if (!jffs2_can_mark_obsolete(c)) { 5091da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5121da177e4SLinus Torvalds if (!rd) 5131da177e4SLinus Torvalds return -ENOMEM; 5141da177e4SLinus Torvalds 5159fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 516e631ddbaSFerenc Havasi ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 5171da177e4SLinus Torvalds if (ret) { 5181da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5191da177e4SLinus Torvalds return ret; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds down(&dir_f->sem); 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* Build a deletion node */ 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 = cpu_to_je32(0); 5333a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5341da177e4SLinus Torvalds rd->nsize = namelen; 5351da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 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 5399fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds if (IS_ERR(fd)) { 5441da177e4SLinus Torvalds jffs2_complete_reservation(c); 5451da177e4SLinus Torvalds up(&dir_f->sem); 5461da177e4SLinus Torvalds return PTR_ERR(fd); 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5501da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5511da177e4SLinus Torvalds up(&dir_f->sem); 5521da177e4SLinus Torvalds } else { 5531da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 5541da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds down(&dir_f->sem); 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 5591da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 5601da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 5611da177e4SLinus Torvalds !(*prev)->name[namelen]) { 5621da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 5651da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds *prev = this->next; 5681da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 5691da177e4SLinus Torvalds jffs2_free_full_dirent(this); 5701da177e4SLinus Torvalds break; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds prev = &((*prev)->next); 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds up(&dir_f->sem); 5751da177e4SLinus Torvalds } 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 5781da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 5791da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 5801da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds down(&dead_f->sem); 5831da177e4SLinus Torvalds 58432f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 5851da177e4SLinus Torvalds while (dead_f->dents) { 5861da177e4SLinus Torvalds /* There can be only deleted ones */ 5871da177e4SLinus Torvalds fd = dead_f->dents; 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds dead_f->dents = fd->next; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds if (fd->ino) { 5921da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 5931da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 5941da177e4SLinus Torvalds } else { 59532f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 59632f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 5991da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6001da177e4SLinus Torvalds } 60132f1a95dSArtem B. Bityuckiy } 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds dead_f->inocache->nlink--; 6041da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6051da177e4SLinus Torvalds up(&dead_f->sem); 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds jffs2_complete_reservation(c); 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds return 0; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds 6143a69e0cdSArtem 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) 6151da177e4SLinus Torvalds { 6161da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6171da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6189fe4854cSDavid Woodhouse uint32_t alloclen; 6191da177e4SLinus Torvalds int ret; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6221da177e4SLinus Torvalds if (!rd) 6231da177e4SLinus Torvalds return -ENOMEM; 6241da177e4SLinus Torvalds 6259fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 626e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 6271da177e4SLinus Torvalds if (ret) { 6281da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6291da177e4SLinus Torvalds return ret; 6301da177e4SLinus Torvalds } 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds down(&dir_f->sem); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds /* Build a deletion node */ 6351da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6361da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6371da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6381da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6411da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6421da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6433a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6441da177e4SLinus Torvalds rd->nsize = namelen; 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds rd->type = type; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6491da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6501da177e4SLinus Torvalds 6519fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds if (IS_ERR(fd)) { 6561da177e4SLinus Torvalds jffs2_complete_reservation(c); 6571da177e4SLinus Torvalds up(&dir_f->sem); 6581da177e4SLinus Torvalds return PTR_ERR(fd); 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 6621da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds jffs2_complete_reservation(c); 6651da177e4SLinus Torvalds up(&dir_f->sem); 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds return 0; 6681da177e4SLinus Torvalds } 669