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 21869ca4378SDavid Woodhouse if (strnlen(name, namelen) != namelen) { 21969ca4378SDavid Woodhouse /* This should never happen, but seems to have done on at least one 22069ca4378SDavid Woodhouse occasion: https://dev.laptop.org/ticket/4184 */ 22169ca4378SDavid Woodhouse printk(KERN_CRIT "Error in jffs2_write_dirent() -- name contains zero bytes!\n"); 22269ca4378SDavid Woodhouse printk(KERN_CRIT "Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x\n", 22369ca4378SDavid Woodhouse je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 22469ca4378SDavid Woodhouse je32_to_cpu(rd->name_crc)); 22569ca4378SDavid Woodhouse WARN_ON(1); 22669ca4378SDavid Woodhouse return ERR_PTR(-EIO); 22769ca4378SDavid Woodhouse } 22869ca4378SDavid Woodhouse 2291da177e4SLinus Torvalds vecs[0].iov_base = rd; 2301da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2311da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2321da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2352f785402SDavid Woodhouse if (!fd) 2361da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2391da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 24069ca4378SDavid Woodhouse fd->nhash = full_name_hash(name, namelen); 2411da177e4SLinus Torvalds fd->type = rd->type; 2421da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2431da177e4SLinus Torvalds fd->name[namelen]=0; 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds retry: 2462f785402SDavid Woodhouse flash_ofs = write_ofs(c); 2471da177e4SLinus Torvalds 2482f785402SDavid Woodhouse jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 2491da177e4SLinus Torvalds 2509b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2519b88f473SEstelle Hammache BUG_ON(!retried); 2529b88f473SEstelle Hammache D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " 2539b88f473SEstelle Hammache "highest version %d -> updating dirent\n", 254e4803c30SEstelle Hammache je32_to_cpu(rd->version), f->highest_version)); 255e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 256e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 257e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 258e4803c30SEstelle Hammache } 259e4803c30SEstelle Hammache 2601da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2611da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2621da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2631da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2641da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2651da177e4SLinus Torvalds /* Mark the space as dirtied */ 2661da177e4SLinus Torvalds if (retlen) { 2672f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); 2681da177e4SLinus Torvalds } else { 2692f785402SDavid Woodhouse printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); 2701da177e4SLinus Torvalds } 2712f785402SDavid Woodhouse if (!retried) { 2721da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2731da177e4SLinus Torvalds uint32_t dummy; 2741da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds retried = 1; 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying failed write.\n")); 2791da177e4SLinus Torvalds 280730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 281730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 2849fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, 2859fe4854cSDavid Woodhouse JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2861da177e4SLinus Torvalds } else { 2871da177e4SLinus Torvalds /* Locking pain */ 2881da177e4SLinus Torvalds up(&f->sem); 2891da177e4SLinus Torvalds jffs2_complete_reservation(c); 2901da177e4SLinus Torvalds 2919fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, 2929fe4854cSDavid Woodhouse alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2931da177e4SLinus Torvalds down(&f->sem); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds if (!ret) { 2979fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 2981da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); 299730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 300730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3011da177e4SLinus Torvalds goto retry; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); 3041da177e4SLinus Torvalds } 3051da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3061da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3071da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds /* Mark the space used */ 31071c23397SDavid Woodhouse fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), 31171c23397SDavid Woodhouse PAD(sizeof(*rd)+namelen), f->inocache); 3125bd5c03cSJoakim Tjernlund if (IS_ERR(fd->raw)) { 3135bd5c03cSJoakim Tjernlund void *hold_err = fd->raw; 3145bd5c03cSJoakim Tjernlund /* Release the full_dirent which is now useless, and return */ 3155bd5c03cSJoakim Tjernlund jffs2_free_full_dirent(fd); 3165bd5c03cSJoakim Tjernlund return ERR_PTR(PTR_ERR(hold_err)); 3175bd5c03cSJoakim Tjernlund } 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds if (retried) { 320730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds return fd; 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3271da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3281da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3291da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3301da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3311da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3321da177e4SLinus Torvalds { 3331da177e4SLinus Torvalds int ret = 0; 3341da177e4SLinus Torvalds uint32_t writtenlen = 0; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", 3371da177e4SLinus Torvalds f->inocache->ino, offset, writelen)); 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds while(writelen) { 3401da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3411da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3421da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3439fe4854cSDavid Woodhouse uint32_t alloclen; 3441da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3451da177e4SLinus Torvalds int retried = 0; 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds retry: 3481da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); 3491da177e4SLinus Torvalds 3509fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, 351e631ddbaSFerenc Havasi &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); 3521da177e4SLinus Torvalds if (ret) { 3531da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); 3541da177e4SLinus Torvalds break; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds down(&f->sem); 3571da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3581da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3631da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3641da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3651da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3681da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3691da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3701da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3711da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3721da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3731da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3741da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3751da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3761da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3771da177e4SLinus Torvalds 3789fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds if (IS_ERR(fn)) { 3831da177e4SLinus Torvalds ret = PTR_ERR(fn); 3841da177e4SLinus Torvalds up(&f->sem); 3851da177e4SLinus Torvalds jffs2_complete_reservation(c); 3861da177e4SLinus Torvalds if (!retried) { 3871da177e4SLinus Torvalds /* Write error to be retried */ 3881da177e4SLinus Torvalds retried = 1; 3891da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); 3901da177e4SLinus Torvalds goto retry; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds break; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 3951da177e4SLinus Torvalds if (f->metadata) { 3961da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 3971da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 3981da177e4SLinus Torvalds f->metadata = NULL; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds if (ret) { 4011da177e4SLinus Torvalds /* Eep */ 4021da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); 4031da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4041da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds up(&f->sem); 4071da177e4SLinus Torvalds jffs2_complete_reservation(c); 4081da177e4SLinus Torvalds break; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds up(&f->sem); 4111da177e4SLinus Torvalds jffs2_complete_reservation(c); 4121da177e4SLinus Torvalds if (!datalen) { 4131da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4141da177e4SLinus Torvalds ret = -EIO; 4151da177e4SLinus Torvalds break; 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); 4181da177e4SLinus Torvalds writtenlen += datalen; 4191da177e4SLinus Torvalds offset += datalen; 4201da177e4SLinus Torvalds writelen -= datalen; 4211da177e4SLinus Torvalds buf += datalen; 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds *retlen = writtenlen; 4241da177e4SLinus Torvalds return ret; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus 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) 4281da177e4SLinus Torvalds { 4291da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4301da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4311da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4329fe4854cSDavid Woodhouse uint32_t alloclen; 4331da177e4SLinus Torvalds int ret; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4361da177e4SLinus Torvalds * Just the node will do for now, though 4371da177e4SLinus Torvalds */ 4389fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, 439e631ddbaSFerenc Havasi JFFS2_SUMMARY_INODE_SIZE); 4401da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); 4411da177e4SLinus Torvalds if (ret) { 4421da177e4SLinus Torvalds up(&f->sem); 4431da177e4SLinus Torvalds return ret; 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4471da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4481da177e4SLinus Torvalds 4499fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", 4521da177e4SLinus Torvalds jemode_to_cpu(ri->mode))); 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds if (IS_ERR(fn)) { 4551da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); 4561da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 4571da177e4SLinus Torvalds up(&f->sem); 4581da177e4SLinus Torvalds jffs2_complete_reservation(c); 4591da177e4SLinus Torvalds return PTR_ERR(fn); 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4621da177e4SLinus Torvalds obsoleted by the first data write 4631da177e4SLinus Torvalds */ 4641da177e4SLinus Torvalds f->metadata = fn; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds up(&f->sem); 4671da177e4SLinus Torvalds jffs2_complete_reservation(c); 4689fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 469e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds if (ret) { 4721da177e4SLinus Torvalds /* Eep. */ 4731da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 4741da177e4SLinus Torvalds return ret; 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4781da177e4SLinus Torvalds if (!rd) { 4791da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4801da177e4SLinus Torvalds jffs2_complete_reservation(c); 4811da177e4SLinus Torvalds return -ENOMEM; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds down(&dir_f->sem); 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4871da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 4881da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 4891da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 4921da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 4931da177e4SLinus Torvalds rd->ino = ri->ino; 4941da177e4SLinus Torvalds rd->mctime = ri->ctime; 4951da177e4SLinus Torvalds rd->nsize = namelen; 4961da177e4SLinus Torvalds rd->type = DT_REG; 4971da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 4981da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 4991da177e4SLinus Torvalds 5009fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds if (IS_ERR(fd)) { 5051da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5061da177e4SLinus Torvalds as if it were the final unlink() */ 5071da177e4SLinus Torvalds jffs2_complete_reservation(c); 5081da177e4SLinus Torvalds up(&dir_f->sem); 5091da177e4SLinus Torvalds return PTR_ERR(fd); 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5131da177e4SLinus Torvalds one if necessary. */ 5141da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds jffs2_complete_reservation(c); 5171da177e4SLinus Torvalds up(&dir_f->sem); 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds return 0; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5243a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5253a69e0cdSArtem B. Bityutskiy uint32_t time) 5261da177e4SLinus Torvalds { 5271da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5281da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5299fe4854cSDavid Woodhouse uint32_t alloclen; 5301da177e4SLinus Torvalds int ret; 5311da177e4SLinus Torvalds 532a491486aSJoakim Tjernlund if (!jffs2_can_mark_obsolete(c)) { 5331da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5361da177e4SLinus Torvalds if (!rd) 5371da177e4SLinus Torvalds return -ENOMEM; 5381da177e4SLinus Torvalds 5399fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 540e631ddbaSFerenc Havasi ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 5411da177e4SLinus Torvalds if (ret) { 5421da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5431da177e4SLinus Torvalds return ret; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds down(&dir_f->sem); 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds /* Build a deletion node */ 5491da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5501da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5511da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5521da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5551da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5561da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5573a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5581da177e4SLinus Torvalds rd->nsize = namelen; 5591da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5601da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5611da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5621da177e4SLinus Torvalds 5639fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds if (IS_ERR(fd)) { 5681da177e4SLinus Torvalds jffs2_complete_reservation(c); 5691da177e4SLinus Torvalds up(&dir_f->sem); 5701da177e4SLinus Torvalds return PTR_ERR(fd); 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5741da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5751da177e4SLinus Torvalds up(&dir_f->sem); 5761da177e4SLinus Torvalds } else { 5771da177e4SLinus Torvalds struct jffs2_full_dirent **prev = &dir_f->dents; 5781da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5791da177e4SLinus Torvalds 580b5748643SDavid Woodhouse /* We don't actually want to reserve any space, but we do 581b5748643SDavid Woodhouse want to be holding the alloc_sem when we write to flash */ 582b5748643SDavid Woodhouse down(&c->alloc_sem); 5831da177e4SLinus Torvalds down(&dir_f->sem); 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds while ((*prev) && (*prev)->nhash <= nhash) { 5861da177e4SLinus Torvalds if ((*prev)->nhash == nhash && 5871da177e4SLinus Torvalds !memcmp((*prev)->name, name, namelen) && 5881da177e4SLinus Torvalds !(*prev)->name[namelen]) { 5891da177e4SLinus Torvalds struct jffs2_full_dirent *this = *prev; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", 5921da177e4SLinus Torvalds this->ino, ref_offset(this->raw))); 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds *prev = this->next; 5951da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, (this->raw)); 5961da177e4SLinus Torvalds jffs2_free_full_dirent(this); 5971da177e4SLinus Torvalds break; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds prev = &((*prev)->next); 6001da177e4SLinus Torvalds } 6011da177e4SLinus Torvalds up(&dir_f->sem); 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 6051da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 6061da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 6071da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds down(&dead_f->sem); 6101da177e4SLinus Torvalds 61132f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 6121da177e4SLinus Torvalds while (dead_f->dents) { 6131da177e4SLinus Torvalds /* There can be only deleted ones */ 6141da177e4SLinus Torvalds fd = dead_f->dents; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds dead_f->dents = fd->next; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds if (fd->ino) { 6191da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6201da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6211da177e4SLinus Torvalds } else { 62232f1a95dSArtem B. Bityuckiy D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", 62332f1a95dSArtem B. Bityuckiy fd->name, dead_f->inocache->ino)); 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6261da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6271da177e4SLinus Torvalds } 62832f1a95dSArtem B. Bityuckiy } 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds dead_f->inocache->nlink--; 6311da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 6321da177e4SLinus Torvalds up(&dead_f->sem); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds jffs2_complete_reservation(c); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds return 0; 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds 6413a69e0cdSArtem 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) 6421da177e4SLinus Torvalds { 6431da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6441da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6459fe4854cSDavid Woodhouse uint32_t alloclen; 6461da177e4SLinus Torvalds int ret; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6491da177e4SLinus Torvalds if (!rd) 6501da177e4SLinus Torvalds return -ENOMEM; 6511da177e4SLinus Torvalds 6529fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 653e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 6541da177e4SLinus Torvalds if (ret) { 6551da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6561da177e4SLinus Torvalds return ret; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds down(&dir_f->sem); 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds /* Build a deletion node */ 6621da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6631da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6641da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6651da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6681da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6691da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6703a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6711da177e4SLinus Torvalds rd->nsize = namelen; 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds rd->type = type; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6761da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6771da177e4SLinus Torvalds 6789fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds if (IS_ERR(fd)) { 6831da177e4SLinus Torvalds jffs2_complete_reservation(c); 6841da177e4SLinus Torvalds up(&dir_f->sem); 6851da177e4SLinus Torvalds return PTR_ERR(fd); 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 6891da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds jffs2_complete_reservation(c); 6921da177e4SLinus Torvalds up(&dir_f->sem); 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds return 0; 6951da177e4SLinus Torvalds } 696