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); 1765bd5c03cSJoakim Tjernlund if (IS_ERR(fn->raw)) { 1775bd5c03cSJoakim Tjernlund void *hold_err = fn->raw; 1785bd5c03cSJoakim Tjernlund /* Release the full_dnode which is now useless, and return */ 1795bd5c03cSJoakim Tjernlund jffs2_free_full_dnode(fn); 1805bd5c03cSJoakim Tjernlund return ERR_PTR(PTR_ERR(hold_err)); 1815bd5c03cSJoakim Tjernlund } 1822f785402SDavid Woodhouse fn->ofs = je32_to_cpu(ri->offset); 1832f785402SDavid Woodhouse fn->size = je32_to_cpu(ri->dsize); 1842f785402SDavid Woodhouse fn->frags = 0; 1851da177e4SLinus Torvalds 1861da177e4SLinus 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", 1872f785402SDavid Woodhouse flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), 1881da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 1891da177e4SLinus Torvalds je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds if (retried) { 192730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds return fn; 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 1989fe4854cSDavid Woodhouse struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 1999fe4854cSDavid Woodhouse struct jffs2_raw_dirent *rd, const unsigned char *name, 2009fe4854cSDavid Woodhouse uint32_t namelen, int alloc_mode) 2011da177e4SLinus Torvalds { 2021da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2031da177e4SLinus Torvalds size_t retlen; 2041da177e4SLinus Torvalds struct kvec vecs[2]; 2052f785402SDavid Woodhouse uint32_t flash_ofs; 2061da177e4SLinus Torvalds int retried = 0; 2071da177e4SLinus Torvalds int ret; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2101da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2111da177e4SLinus Torvalds je32_to_cpu(rd->name_crc))); 212730554d9SArtem B. Bityutskiy 2131da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2141da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2151da177e4SLinus Torvalds BUG(); 2162f785402SDavid Woodhouse }); 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds vecs[0].iov_base = rd; 2191da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2201da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2211da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2242f785402SDavid Woodhouse if (!fd) 2251da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2281da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 2291da177e4SLinus Torvalds fd->nhash = full_name_hash(name, strlen(name)); 2301da177e4SLinus Torvalds fd->type = rd->type; 2311da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2321da177e4SLinus Torvalds fd->name[namelen]=0; 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds retry: 2352f785402SDavid Woodhouse flash_ofs = write_ofs(c); 2361da177e4SLinus Torvalds 2372f785402SDavid Woodhouse jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 2381da177e4SLinus Torvalds 2399b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2409b88f473SEstelle Hammache BUG_ON(!retried); 2419b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2429b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 243e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 244e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 245e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 246e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 247e4803c30SEstelle Hammache } 248e4803c30SEstelle Hammache 2491da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2501da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2511da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2521da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2531da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2541da177e4SLinus Torvalds /* Mark the space as dirtied */ 2551da177e4SLinus Torvalds if (retlen) { 2562f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); 2571da177e4SLinus Torvalds } else { 2582f785402SDavid Woodhouse printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); 2591da177e4SLinus Torvalds } 2602f785402SDavid Woodhouse if (!retried) { 2611da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2621da177e4SLinus Torvalds uint32_t dummy; 2631da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds retried = 1; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 2681da177e4SLinus Torvalds 269730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 270730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 2739fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, 2749fe4854cSDavid Woodhouse JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2751da177e4SLinus Torvalds } else { 2761da177e4SLinus Torvalds /* Locking pain */ 2771da177e4SLinus Torvalds up(&f->sem); 2781da177e4SLinus Torvalds jffs2_complete_reservation(c); 2791da177e4SLinus Torvalds 2809fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, 2819fe4854cSDavid Woodhouse alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2821da177e4SLinus Torvalds down(&f->sem); 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds if (!ret) { 2869fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 2871da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 288730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 289730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2901da177e4SLinus Torvalds goto retry; 2911da177e4SLinus Torvalds } 2921da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 2951da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 2961da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds /* Mark the space used */ 29971c23397SDavid Woodhouse fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), 30071c23397SDavid Woodhouse PAD(sizeof(*rd)+namelen), f->inocache); 3015bd5c03cSJoakim Tjernlund if (IS_ERR(fd->raw)) { 3025bd5c03cSJoakim Tjernlund void *hold_err = fd->raw; 3035bd5c03cSJoakim Tjernlund /* Release the full_dirent which is now useless, and return */ 3045bd5c03cSJoakim Tjernlund jffs2_free_full_dirent(fd); 3055bd5c03cSJoakim Tjernlund return ERR_PTR(PTR_ERR(hold_err)); 3065bd5c03cSJoakim Tjernlund } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds if (retried) { 309730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds return fd; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3161da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3171da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3181da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3191da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3201da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds int ret = 0; 3231da177e4SLinus Torvalds uint32_t writtenlen = 0; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3261da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds while(writelen) { 3291da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3301da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3311da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3329fe4854cSDavid Woodhouse uint32_t alloclen; 3331da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3341da177e4SLinus Torvalds int retried = 0; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds retry: 3371da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3381da177e4SLinus Torvalds 3399fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, 340e631ddbaSFerenc Havasi &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); 3411da177e4SLinus Torvalds if (ret) { 3421da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3431da177e4SLinus Torvalds break; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds down(&f->sem); 3461da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3471da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3521da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3531da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3541da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3571da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3581da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3591da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3601da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3611da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3621da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3631da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3641da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3651da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3661da177e4SLinus Torvalds 3679fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds if (IS_ERR(fn)) { 3721da177e4SLinus Torvalds ret = PTR_ERR(fn); 3731da177e4SLinus Torvalds up(&f->sem); 3741da177e4SLinus Torvalds jffs2_complete_reservation(c); 3751da177e4SLinus Torvalds if (!retried) { 3761da177e4SLinus Torvalds /* Write error to be retried */ 3771da177e4SLinus Torvalds retried = 1; 3781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 3791da177e4SLinus Torvalds goto retry; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds break; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 3841da177e4SLinus Torvalds if (f->metadata) { 3851da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 3861da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 3871da177e4SLinus Torvalds f->metadata = NULL; 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds if (ret) { 3901da177e4SLinus Torvalds /* Eep */ 3911da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 3921da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 3931da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds up(&f->sem); 3961da177e4SLinus Torvalds jffs2_complete_reservation(c); 3971da177e4SLinus Torvalds break; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds up(&f->sem); 4001da177e4SLinus Torvalds jffs2_complete_reservation(c); 4011da177e4SLinus Torvalds if (!datalen) { 4021da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4031da177e4SLinus Torvalds ret = -EIO; 4041da177e4SLinus Torvalds break; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4071da177e4SLinus Torvalds writtenlen += datalen; 4081da177e4SLinus Torvalds offset += datalen; 4091da177e4SLinus Torvalds writelen -= datalen; 4101da177e4SLinus Torvalds buf += datalen; 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds *retlen = writtenlen; 4131da177e4SLinus Torvalds return ret; 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 4161da177e4SLinus 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) 4171da177e4SLinus Torvalds { 4181da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4191da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4201da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4219fe4854cSDavid Woodhouse uint32_t alloclen; 4221da177e4SLinus Torvalds int ret; 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4251da177e4SLinus Torvalds * Just the node will do for now, though 4261da177e4SLinus Torvalds */ 4279fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, 428e631ddbaSFerenc Havasi JFFS2_SUMMARY_INODE_SIZE); 4291da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4301da177e4SLinus Torvalds if (ret) { 4311da177e4SLinus Torvalds up(&f->sem); 4321da177e4SLinus Torvalds return ret; 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4361da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4371da177e4SLinus Torvalds 4389fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4411da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds if (IS_ERR(fn)) { 4441da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4451da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4461da177e4SLinus Torvalds up(&f->sem); 4471da177e4SLinus Torvalds jffs2_complete_reservation(c); 4481da177e4SLinus Torvalds return PTR_ERR(fn); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4511da177e4SLinus Torvalds obsoleted by the first data write 4521da177e4SLinus Torvalds */ 4531da177e4SLinus Torvalds f->metadata = fn; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds up(&f->sem); 4561da177e4SLinus Torvalds jffs2_complete_reservation(c); 4579fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 458e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds if (ret) { 4611da177e4SLinus Torvalds /* Eep. */ 4621da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4631da177e4SLinus Torvalds return ret; 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4671da177e4SLinus Torvalds if (!rd) { 4681da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4691da177e4SLinus Torvalds jffs2_complete_reservation(c); 4701da177e4SLinus Torvalds return -ENOMEM; 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds down(&dir_f->sem); 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4761da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 4771da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 4781da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 4811da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 4821da177e4SLinus Torvalds rd->ino = ri->ino; 4831da177e4SLinus Torvalds rd->mctime = ri->ctime; 4841da177e4SLinus Torvalds rd->nsize = namelen; 4851da177e4SLinus Torvalds rd->type = DT_REG; 4861da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 4871da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 4881da177e4SLinus Torvalds 4899fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds if (IS_ERR(fd)) { 4941da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 4951da177e4SLinus Torvalds as if it were the final unlink() */ 4961da177e4SLinus Torvalds jffs2_complete_reservation(c); 4971da177e4SLinus Torvalds up(&dir_f->sem); 4981da177e4SLinus Torvalds return PTR_ERR(fd); 4991da177e4SLinus Torvalds } 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5021da177e4SLinus Torvalds one if necessary. */ 5031da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds jffs2_complete_reservation(c); 5061da177e4SLinus Torvalds up(&dir_f->sem); 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds return 0; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5133a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5143a69e0cdSArtem B. Bityutskiy uint32_t time) 5151da177e4SLinus Torvalds { 5161da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5171da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5189fe4854cSDavid Woodhouse uint32_t alloclen; 5191da177e4SLinus Torvalds int ret; 5201da177e4SLinus Torvalds 521a491486aSJoakim Tjernlund if (!jffs2_can_mark_obsolete(c)) { 5221da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5251da177e4SLinus Torvalds if (!rd) 5261da177e4SLinus Torvalds return -ENOMEM; 5271da177e4SLinus Torvalds 5289fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 529e631ddbaSFerenc Havasi ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 5301da177e4SLinus Torvalds if (ret) { 5311da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5321da177e4SLinus Torvalds return ret; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds down(&dir_f->sem); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds /* Build a deletion node */ 5381da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5391da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5401da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5411da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5441da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5451da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5463a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5471da177e4SLinus Torvalds rd->nsize = namelen; 5481da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5491da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5501da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5511da177e4SLinus Torvalds 5529fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds if (IS_ERR(fd)) { 5571da177e4SLinus Torvalds jffs2_complete_reservation(c); 5581da177e4SLinus Torvalds up(&dir_f->sem); 5591da177e4SLinus Torvalds return PTR_ERR(fd); 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5631da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5641da177e4SLinus Torvalds up(&dir_f->sem); 5651da177e4SLinus Torvalds } else { 5661da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 5671da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds down(&dir_f->sem); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 5721da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 5731da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 5741da177e4SLinus Torvalds !(*prev)->name[namelen]) { 5751da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 5781da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds *prev = this->next; 5811da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 5821da177e4SLinus Torvalds jffs2_free_full_dirent(this); 5831da177e4SLinus Torvalds break; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds prev = &((*prev)->next); 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds up(&dir_f->sem); 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 5911da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 5921da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 5931da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds down(&dead_f->sem); 5961da177e4SLinus Torvalds 59732f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 5981da177e4SLinus Torvalds while (dead_f->dents) { 5991da177e4SLinus Torvalds /* There can be only deleted ones */ 6001da177e4SLinus Torvalds fd = dead_f->dents; 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds dead_f->dents = fd->next; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds if (fd->ino) { 6051da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6061da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6071da177e4SLinus Torvalds } else { 60832f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 60932f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6121da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6131da177e4SLinus Torvalds } 61432f1a95dSArtem B. Bityuckiy } 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds dead_f->inocache->nlink--; 6171da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6181da177e4SLinus Torvalds up(&dead_f->sem); 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds jffs2_complete_reservation(c); 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds return 0; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds 6273a69e0cdSArtem 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) 6281da177e4SLinus Torvalds { 6291da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6301da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6319fe4854cSDavid Woodhouse uint32_t alloclen; 6321da177e4SLinus Torvalds int ret; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6351da177e4SLinus Torvalds if (!rd) 6361da177e4SLinus Torvalds return -ENOMEM; 6371da177e4SLinus Torvalds 6389fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 639e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 6401da177e4SLinus Torvalds if (ret) { 6411da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6421da177e4SLinus Torvalds return ret; 6431da177e4SLinus Torvalds } 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds down(&dir_f->sem); 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds /* Build a deletion node */ 6481da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6491da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6501da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6511da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6541da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6551da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6563a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6571da177e4SLinus Torvalds rd->nsize = namelen; 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds rd->type = type; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6621da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6631da177e4SLinus Torvalds 6649fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds if (IS_ERR(fd)) { 6691da177e4SLinus Torvalds jffs2_complete_reservation(c); 6701da177e4SLinus Torvalds up(&dir_f->sem); 6711da177e4SLinus Torvalds return PTR_ERR(fd); 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 6751da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds jffs2_complete_reservation(c); 6781da177e4SLinus Torvalds up(&dir_f->sem); 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds return 0; 6811da177e4SLinus Torvalds } 682