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/pagemap.h> 161da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 171da177e4SLinus Torvalds #include "nodelist.h" 181da177e4SLinus Torvalds #include "compr.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds 2127c72b04SDavid Woodhouse int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 2227c72b04SDavid Woodhouse 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; 3427c72b04SDavid Woodhouse f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */ 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); 399c261b33SJoe Perches jffs2_dbg(1, "%s(): Assigned ino# %d\n", __func__, 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); 989c261b33SJoe Perches jffs2_dbg(1, "%s(): dnode_version %d, highest version %d -> updating dnode\n", 999c261b33SJoe Perches __func__, 1009c261b33SJoe Perches 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 1309c261b33SJoe Perches jffs2_dbg(1, "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 */ 140ced22070SDavid Woodhouse mutex_unlock(&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); 145ced22070SDavid Woodhouse mutex_lock(&f->sem); 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds if (!ret) { 1499fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 1509c261b33SJoe Perches jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write.\n", 1519c261b33SJoe Perches flash_ofs); 1521da177e4SLinus Torvalds 153730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 154730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds goto retry; 1571da177e4SLinus Torvalds } 1589c261b33SJoe Perches jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n", 1599c261b33SJoe Perches ret); 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 1621da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 1631da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds /* Mark the space used */ 1661da177e4SLinus Torvalds /* If node covers at least a whole page, or if it starts at the 1671da177e4SLinus Torvalds beginning of a page and runs to the end of the file, or if 1681da177e4SLinus Torvalds it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. 1691da177e4SLinus Torvalds */ 1701da177e4SLinus Torvalds if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || 1711da177e4SLinus Torvalds ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && 1721da177e4SLinus Torvalds (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { 1732f785402SDavid Woodhouse flash_ofs |= REF_PRISTINE; 1741da177e4SLinus Torvalds } else { 1752f785402SDavid Woodhouse flash_ofs |= REF_NORMAL; 1761da177e4SLinus Torvalds } 1772f785402SDavid Woodhouse fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache); 1785bd5c03cSJoakim Tjernlund if (IS_ERR(fn->raw)) { 1795bd5c03cSJoakim Tjernlund void *hold_err = fn->raw; 1805bd5c03cSJoakim Tjernlund /* Release the full_dnode which is now useless, and return */ 1815bd5c03cSJoakim Tjernlund jffs2_free_full_dnode(fn); 182e231c2eeSDavid Howells return ERR_CAST(hold_err); 1835bd5c03cSJoakim Tjernlund } 1842f785402SDavid Woodhouse fn->ofs = je32_to_cpu(ri->offset); 1852f785402SDavid Woodhouse fn->size = je32_to_cpu(ri->dsize); 1862f785402SDavid Woodhouse fn->frags = 0; 1871da177e4SLinus Torvalds 1889c261b33SJoe Perches jffs2_dbg(1, "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", 1892f785402SDavid Woodhouse flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), 1901da177e4SLinus Torvalds je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), 1919c261b33SJoe Perches je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen)); 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds if (retried) { 194730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds return fn; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds 2009fe4854cSDavid Woodhouse struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 2019fe4854cSDavid Woodhouse struct jffs2_raw_dirent *rd, const unsigned char *name, 2029fe4854cSDavid Woodhouse uint32_t namelen, int alloc_mode) 2031da177e4SLinus Torvalds { 2041da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 2051da177e4SLinus Torvalds size_t retlen; 2061da177e4SLinus Torvalds struct kvec vecs[2]; 2072f785402SDavid Woodhouse uint32_t flash_ofs; 2081da177e4SLinus Torvalds int retried = 0; 2091da177e4SLinus Torvalds int ret; 2101da177e4SLinus Torvalds 2119c261b33SJoe Perches jffs2_dbg(1, "%s(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", 2129c261b33SJoe Perches __func__, 2131da177e4SLinus Torvalds je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 2149c261b33SJoe Perches je32_to_cpu(rd->name_crc)); 215730554d9SArtem B. Bityutskiy 2161da177e4SLinus Torvalds D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { 2171da177e4SLinus Torvalds printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); 2181da177e4SLinus Torvalds BUG(); 2192f785402SDavid Woodhouse }); 2201da177e4SLinus Torvalds 22169ca4378SDavid Woodhouse if (strnlen(name, namelen) != namelen) { 22269ca4378SDavid Woodhouse /* This should never happen, but seems to have done on at least one 22369ca4378SDavid Woodhouse occasion: https://dev.laptop.org/ticket/4184 */ 22469ca4378SDavid Woodhouse printk(KERN_CRIT "Error in jffs2_write_dirent() -- name contains zero bytes!\n"); 22569ca4378SDavid Woodhouse printk(KERN_CRIT "Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x\n", 22669ca4378SDavid Woodhouse je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), 22769ca4378SDavid Woodhouse je32_to_cpu(rd->name_crc)); 22869ca4378SDavid Woodhouse WARN_ON(1); 22969ca4378SDavid Woodhouse return ERR_PTR(-EIO); 23069ca4378SDavid Woodhouse } 23169ca4378SDavid Woodhouse 2321da177e4SLinus Torvalds vecs[0].iov_base = rd; 2331da177e4SLinus Torvalds vecs[0].iov_len = sizeof(*rd); 2341da177e4SLinus Torvalds vecs[1].iov_base = (unsigned char *)name; 2351da177e4SLinus Torvalds vecs[1].iov_len = namelen; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds fd = jffs2_alloc_full_dirent(namelen+1); 2382f785402SDavid Woodhouse if (!fd) 2391da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds fd->version = je32_to_cpu(rd->version); 2421da177e4SLinus Torvalds fd->ino = je32_to_cpu(rd->ino); 24369ca4378SDavid Woodhouse fd->nhash = full_name_hash(name, namelen); 2441da177e4SLinus Torvalds fd->type = rd->type; 2451da177e4SLinus Torvalds memcpy(fd->name, name, namelen); 2461da177e4SLinus Torvalds fd->name[namelen]=0; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds retry: 2492f785402SDavid Woodhouse flash_ofs = write_ofs(c); 2501da177e4SLinus Torvalds 2512f785402SDavid Woodhouse jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); 2521da177e4SLinus Torvalds 2539b88f473SEstelle Hammache if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { 2549b88f473SEstelle Hammache BUG_ON(!retried); 2559c261b33SJoe Perches jffs2_dbg(1, "%s(): dirent_version %d, highest version %d -> updating dirent\n", 2569c261b33SJoe Perches __func__, 2579c261b33SJoe Perches je32_to_cpu(rd->version), f->highest_version); 258e4803c30SEstelle Hammache rd->version = cpu_to_je32(++f->highest_version); 259e4803c30SEstelle Hammache fd->version = je32_to_cpu(rd->version); 260e4803c30SEstelle Hammache rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 261e4803c30SEstelle Hammache } 262e4803c30SEstelle Hammache 2631da177e4SLinus Torvalds ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, 2641da177e4SLinus Torvalds (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); 2651da177e4SLinus Torvalds if (ret || (retlen != sizeof(*rd) + namelen)) { 2661da177e4SLinus Torvalds printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 2671da177e4SLinus Torvalds sizeof(*rd)+namelen, flash_ofs, ret, retlen); 2681da177e4SLinus Torvalds /* Mark the space as dirtied */ 2691da177e4SLinus Torvalds if (retlen) { 2702f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); 2711da177e4SLinus Torvalds } else { 2722f785402SDavid Woodhouse printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); 2731da177e4SLinus Torvalds } 2742f785402SDavid Woodhouse if (!retried) { 2751da177e4SLinus Torvalds /* Try to reallocate space and retry */ 2761da177e4SLinus Torvalds uint32_t dummy; 2771da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds retried = 1; 2801da177e4SLinus Torvalds 2819c261b33SJoe Perches jffs2_dbg(1, "Retrying failed write.\n"); 2821da177e4SLinus Torvalds 283730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 284730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds if (alloc_mode == ALLOC_GC) { 2879fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, 2889fe4854cSDavid Woodhouse JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 2891da177e4SLinus Torvalds } else { 2901da177e4SLinus Torvalds /* Locking pain */ 291ced22070SDavid Woodhouse mutex_unlock(&f->sem); 2921da177e4SLinus Torvalds jffs2_complete_reservation(c); 2931da177e4SLinus Torvalds 2949fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, 2959fe4854cSDavid Woodhouse alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 296ced22070SDavid Woodhouse mutex_lock(&f->sem); 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds if (!ret) { 3009fe4854cSDavid Woodhouse flash_ofs = write_ofs(c); 3019c261b33SJoe Perches jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write\n", 3029c261b33SJoe Perches flash_ofs); 303730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,jeb); 304730554d9SArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check(c, jeb); 3051da177e4SLinus Torvalds goto retry; 3061da177e4SLinus Torvalds } 3079c261b33SJoe Perches jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n", 3089c261b33SJoe Perches ret); 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds /* Release the full_dnode which is now useless, and return */ 3111da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 3121da177e4SLinus Torvalds return ERR_PTR(ret?ret:-EIO); 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds /* Mark the space used */ 31571c23397SDavid Woodhouse fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), 31671c23397SDavid Woodhouse PAD(sizeof(*rd)+namelen), f->inocache); 3175bd5c03cSJoakim Tjernlund if (IS_ERR(fd->raw)) { 3185bd5c03cSJoakim Tjernlund void *hold_err = fd->raw; 3195bd5c03cSJoakim Tjernlund /* Release the full_dirent which is now useless, and return */ 3205bd5c03cSJoakim Tjernlund jffs2_free_full_dirent(fd); 321e231c2eeSDavid Howells return ERR_CAST(hold_err); 3225bd5c03cSJoakim Tjernlund } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds if (retried) { 325730554d9SArtem B. Bityutskiy jffs2_dbg_acct_sanity_check(c,NULL); 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds return fd; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that 3321da177e4SLinus Torvalds we don't have to go digging in struct inode or its equivalent. It should set: 3331da177e4SLinus Torvalds mode, uid, gid, (starting)isize, atime, ctime, mtime */ 3341da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3351da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3361da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds int ret = 0; 3391da177e4SLinus Torvalds uint32_t writtenlen = 0; 3401da177e4SLinus Torvalds 3419c261b33SJoe Perches jffs2_dbg(1, "%s(): Ino #%u, ofs 0x%x, len 0x%x\n", 3429c261b33SJoe Perches __func__, f->inocache->ino, offset, writelen); 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds while(writelen) { 3451da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 3461da177e4SLinus Torvalds unsigned char *comprbuf = NULL; 3471da177e4SLinus Torvalds uint16_t comprtype = JFFS2_COMPR_NONE; 3489fe4854cSDavid Woodhouse uint32_t alloclen; 3491da177e4SLinus Torvalds uint32_t datalen, cdatalen; 3501da177e4SLinus Torvalds int retried = 0; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds retry: 3539c261b33SJoe Perches jffs2_dbg(2, "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", 3549c261b33SJoe Perches writelen, offset); 3551da177e4SLinus Torvalds 3569fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, 357e631ddbaSFerenc Havasi &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); 3581da177e4SLinus Torvalds if (ret) { 3599c261b33SJoe Perches jffs2_dbg(1, "jffs2_reserve_space returned %d\n", ret); 3601da177e4SLinus Torvalds break; 3611da177e4SLinus Torvalds } 362ced22070SDavid Woodhouse mutex_lock(&f->sem); 3631da177e4SLinus Torvalds datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); 3641da177e4SLinus Torvalds cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 3691da177e4SLinus Torvalds ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); 3701da177e4SLinus Torvalds ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); 3711da177e4SLinus Torvalds ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds ri->ino = cpu_to_je32(f->inocache->ino); 3741da177e4SLinus Torvalds ri->version = cpu_to_je32(++f->highest_version); 3751da177e4SLinus Torvalds ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); 3761da177e4SLinus Torvalds ri->offset = cpu_to_je32(offset); 3771da177e4SLinus Torvalds ri->csize = cpu_to_je32(cdatalen); 3781da177e4SLinus Torvalds ri->dsize = cpu_to_je32(datalen); 3791da177e4SLinus Torvalds ri->compr = comprtype & 0xff; 3801da177e4SLinus Torvalds ri->usercompr = (comprtype >> 8 ) & 0xff; 3811da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 3821da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); 3831da177e4SLinus Torvalds 3849fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds jffs2_free_comprbuf(comprbuf, buf); 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds if (IS_ERR(fn)) { 3891da177e4SLinus Torvalds ret = PTR_ERR(fn); 390ced22070SDavid Woodhouse mutex_unlock(&f->sem); 3911da177e4SLinus Torvalds jffs2_complete_reservation(c); 3921da177e4SLinus Torvalds if (!retried) { 3931da177e4SLinus Torvalds /* Write error to be retried */ 3941da177e4SLinus Torvalds retried = 1; 3959c261b33SJoe Perches jffs2_dbg(1, "Retrying node write in jffs2_write_inode_range()\n"); 3961da177e4SLinus Torvalds goto retry; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds break; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds ret = jffs2_add_full_dnode_to_inode(c, f, fn); 4011da177e4SLinus Torvalds if (f->metadata) { 4021da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, f->metadata->raw); 4031da177e4SLinus Torvalds jffs2_free_full_dnode(f->metadata); 4041da177e4SLinus Torvalds f->metadata = NULL; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds if (ret) { 4071da177e4SLinus Torvalds /* Eep */ 4089c261b33SJoe Perches jffs2_dbg(1, "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", 4099c261b33SJoe Perches ret); 4101da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fn->raw); 4111da177e4SLinus Torvalds jffs2_free_full_dnode(fn); 4121da177e4SLinus Torvalds 413ced22070SDavid Woodhouse mutex_unlock(&f->sem); 4141da177e4SLinus Torvalds jffs2_complete_reservation(c); 4151da177e4SLinus Torvalds break; 4161da177e4SLinus Torvalds } 417ced22070SDavid Woodhouse mutex_unlock(&f->sem); 4181da177e4SLinus Torvalds jffs2_complete_reservation(c); 4191da177e4SLinus Torvalds if (!datalen) { 4201da177e4SLinus Torvalds printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); 4211da177e4SLinus Torvalds ret = -EIO; 4221da177e4SLinus Torvalds break; 4231da177e4SLinus Torvalds } 4249c261b33SJoe Perches jffs2_dbg(1, "increasing writtenlen by %d\n", datalen); 4251da177e4SLinus Torvalds writtenlen += datalen; 4261da177e4SLinus Torvalds offset += datalen; 4271da177e4SLinus Torvalds writelen -= datalen; 4281da177e4SLinus Torvalds buf += datalen; 4291da177e4SLinus Torvalds } 4301da177e4SLinus Torvalds *retlen = writtenlen; 4311da177e4SLinus Torvalds return ret; 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds 4342a7dba39SEric Paris int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 4352a7dba39SEric Paris struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, 4362a7dba39SEric Paris const struct qstr *qstr) 4371da177e4SLinus Torvalds { 4381da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 4391da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 4401da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 4419fe4854cSDavid Woodhouse uint32_t alloclen; 4421da177e4SLinus Torvalds int ret; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds /* Try to reserve enough space for both node and dirent. 4451da177e4SLinus Torvalds * Just the node will do for now, though 4461da177e4SLinus Torvalds */ 4479fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, 448e631ddbaSFerenc Havasi JFFS2_SUMMARY_INODE_SIZE); 4499c261b33SJoe Perches jffs2_dbg(1, "%s(): reserved 0x%x bytes\n", __func__, alloclen); 450590fe34cSDavid Woodhouse if (ret) 4511da177e4SLinus Torvalds return ret; 452590fe34cSDavid Woodhouse 453590fe34cSDavid Woodhouse mutex_lock(&f->sem); 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds ri->data_crc = cpu_to_je32(0); 4561da177e4SLinus Torvalds ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); 4571da177e4SLinus Torvalds 4589fe4854cSDavid Woodhouse fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); 4591da177e4SLinus Torvalds 4609c261b33SJoe Perches jffs2_dbg(1, "jffs2_do_create created file with mode 0x%x\n", 4619c261b33SJoe Perches jemode_to_cpu(ri->mode)); 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds if (IS_ERR(fn)) { 4649c261b33SJoe Perches jffs2_dbg(1, "jffs2_write_dnode() failed\n"); 4651da177e4SLinus Torvalds /* Eeek. Wave bye bye */ 466ced22070SDavid Woodhouse mutex_unlock(&f->sem); 4671da177e4SLinus Torvalds jffs2_complete_reservation(c); 4681da177e4SLinus Torvalds return PTR_ERR(fn); 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds /* No data here. Only a metadata node, which will be 4711da177e4SLinus Torvalds obsoleted by the first data write 4721da177e4SLinus Torvalds */ 4731da177e4SLinus Torvalds f->metadata = fn; 4741da177e4SLinus Torvalds 475ced22070SDavid Woodhouse mutex_unlock(&f->sem); 4761da177e4SLinus Torvalds jffs2_complete_reservation(c); 477cfc8dc6fSKaiGai Kohei 4782a7dba39SEric Paris ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode, qstr); 479cfc8dc6fSKaiGai Kohei if (ret) 480cfc8dc6fSKaiGai Kohei return ret; 481cfc8dc6fSKaiGai Kohei ret = jffs2_init_acl_post(&f->vfs_inode); 482cfc8dc6fSKaiGai Kohei if (ret) 483cfc8dc6fSKaiGai Kohei return ret; 484cfc8dc6fSKaiGai Kohei 4852a7dba39SEric Paris ret = jffs2_reserve_space(c, sizeof(*rd)+qstr->len, &alloclen, 4862a7dba39SEric Paris ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(qstr->len)); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds if (ret) { 4891da177e4SLinus Torvalds /* Eep. */ 4909c261b33SJoe Perches jffs2_dbg(1, "jffs2_reserve_space() for dirent failed\n"); 4911da177e4SLinus Torvalds return ret; 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 4951da177e4SLinus Torvalds if (!rd) { 4961da177e4SLinus Torvalds /* Argh. Now we treat it like a normal delete */ 4971da177e4SLinus Torvalds jffs2_complete_reservation(c); 4981da177e4SLinus Torvalds return -ENOMEM; 4991da177e4SLinus Torvalds } 5001da177e4SLinus Torvalds 501ced22070SDavid Woodhouse mutex_lock(&dir_f->sem); 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5041da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5052a7dba39SEric Paris rd->totlen = cpu_to_je32(sizeof(*rd) + qstr->len); 5061da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5091da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5101da177e4SLinus Torvalds rd->ino = ri->ino; 5111da177e4SLinus Torvalds rd->mctime = ri->ctime; 5122a7dba39SEric Paris rd->nsize = qstr->len; 5131da177e4SLinus Torvalds rd->type = DT_REG; 5141da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5152a7dba39SEric Paris rd->name_crc = cpu_to_je32(crc32(0, qstr->name, qstr->len)); 5161da177e4SLinus Torvalds 5172a7dba39SEric Paris fd = jffs2_write_dirent(c, dir_f, rd, qstr->name, qstr->len, ALLOC_NORMAL); 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds if (IS_ERR(fd)) { 5221da177e4SLinus Torvalds /* dirent failed to write. Delete the inode normally 5231da177e4SLinus Torvalds as if it were the final unlink() */ 5241da177e4SLinus Torvalds jffs2_complete_reservation(c); 525ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 5261da177e4SLinus Torvalds return PTR_ERR(fd); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds /* Link the fd into the inode's list, obsoleting an old 5301da177e4SLinus Torvalds one if necessary. */ 5311da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds jffs2_complete_reservation(c); 534ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvalds return 0; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, 5413a69e0cdSArtem B. Bityutskiy const char *name, int namelen, struct jffs2_inode_info *dead_f, 5423a69e0cdSArtem B. Bityutskiy uint32_t time) 5431da177e4SLinus Torvalds { 5441da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 5451da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 5469fe4854cSDavid Woodhouse uint32_t alloclen; 5471da177e4SLinus Torvalds int ret; 5481da177e4SLinus Torvalds 549a491486aSJoakim Tjernlund if (!jffs2_can_mark_obsolete(c)) { 5501da177e4SLinus Torvalds /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 5531da177e4SLinus Torvalds if (!rd) 5541da177e4SLinus Torvalds return -ENOMEM; 5551da177e4SLinus Torvalds 5569fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 557e631ddbaSFerenc Havasi ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 5581da177e4SLinus Torvalds if (ret) { 5591da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5601da177e4SLinus Torvalds return ret; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 563ced22070SDavid Woodhouse mutex_lock(&dir_f->sem); 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds /* Build a deletion node */ 5661da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 5671da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 5681da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 5691da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 5721da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 5731da177e4SLinus Torvalds rd->ino = cpu_to_je32(0); 5743a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 5751da177e4SLinus Torvalds rd->nsize = namelen; 5761da177e4SLinus Torvalds rd->type = DT_UNKNOWN; 5771da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 5781da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 5791da177e4SLinus Torvalds 5809fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds if (IS_ERR(fd)) { 5851da177e4SLinus Torvalds jffs2_complete_reservation(c); 586ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 5871da177e4SLinus Torvalds return PTR_ERR(fd); 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 5911da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 592ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 5931da177e4SLinus Torvalds } else { 5941da177e4SLinus Torvalds uint32_t nhash = full_name_hash(name, namelen); 5951da177e4SLinus Torvalds 596bf66737cSHarvey Harrison fd = dir_f->dents; 597b5748643SDavid Woodhouse /* We don't actually want to reserve any space, but we do 598b5748643SDavid Woodhouse want to be holding the alloc_sem when we write to flash */ 599ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 600ced22070SDavid Woodhouse mutex_lock(&dir_f->sem); 6011da177e4SLinus Torvalds 60215953580SDavid Woodhouse for (fd = dir_f->dents; fd; fd = fd->next) { 60315953580SDavid Woodhouse if (fd->nhash == nhash && 60415953580SDavid Woodhouse !memcmp(fd->name, name, namelen) && 60515953580SDavid Woodhouse !fd->name[namelen]) { 6061da177e4SLinus Torvalds 6079c261b33SJoe Perches jffs2_dbg(1, "Marking old dirent node (ino #%u) @%08x obsolete\n", 6089c261b33SJoe Perches fd->ino, ref_offset(fd->raw)); 60915953580SDavid Woodhouse jffs2_mark_node_obsolete(c, fd->raw); 61015953580SDavid Woodhouse /* We don't want to remove it from the list immediately, 61115953580SDavid Woodhouse because that screws up getdents()/seek() semantics even 61215953580SDavid Woodhouse more than they're screwed already. Turn it into a 61315953580SDavid Woodhouse node-less deletion dirent instead -- a placeholder */ 61415953580SDavid Woodhouse fd->raw = NULL; 61515953580SDavid Woodhouse fd->ino = 0; 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds } 619ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds /* dead_f is NULL if this was a rename not a real unlink */ 6231da177e4SLinus Torvalds /* Also catch the !f->inocache case, where there was a dirent 6241da177e4SLinus Torvalds pointing to an inode which didn't exist. */ 6251da177e4SLinus Torvalds if (dead_f && dead_f->inocache) { 6261da177e4SLinus Torvalds 627ced22070SDavid Woodhouse mutex_lock(&dead_f->sem); 6281da177e4SLinus Torvalds 62932f1a95dSArtem B. Bityuckiy if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { 6301da177e4SLinus Torvalds while (dead_f->dents) { 6311da177e4SLinus Torvalds /* There can be only deleted ones */ 6321da177e4SLinus Torvalds fd = dead_f->dents; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds dead_f->dents = fd->next; 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds if (fd->ino) { 6371da177e4SLinus Torvalds printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", 6381da177e4SLinus Torvalds dead_f->inocache->ino, fd->name, fd->ino); 6391da177e4SLinus Torvalds } else { 6409c261b33SJoe Perches jffs2_dbg(1, "Removing deletion dirent for \"%s\" from dir ino #%u\n", 6419c261b33SJoe Perches fd->name, 6429c261b33SJoe Perches dead_f->inocache->ino); 6431da177e4SLinus Torvalds } 64415953580SDavid Woodhouse if (fd->raw) 6451da177e4SLinus Torvalds jffs2_mark_node_obsolete(c, fd->raw); 6461da177e4SLinus Torvalds jffs2_free_full_dirent(fd); 6471da177e4SLinus Torvalds } 64827c72b04SDavid Woodhouse dead_f->inocache->pino_nlink = 0; 64927c72b04SDavid Woodhouse } else 65027c72b04SDavid Woodhouse dead_f->inocache->pino_nlink--; 6511da177e4SLinus Torvalds /* NB: Caller must set inode nlink if appropriate */ 652ced22070SDavid Woodhouse mutex_unlock(&dead_f->sem); 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds jffs2_complete_reservation(c); 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds return 0; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds 6613a69e0cdSArtem 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) 6621da177e4SLinus Torvalds { 6631da177e4SLinus Torvalds struct jffs2_raw_dirent *rd; 6641da177e4SLinus Torvalds struct jffs2_full_dirent *fd; 6659fe4854cSDavid Woodhouse uint32_t alloclen; 6661da177e4SLinus Torvalds int ret; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds rd = jffs2_alloc_raw_dirent(); 6691da177e4SLinus Torvalds if (!rd) 6701da177e4SLinus Torvalds return -ENOMEM; 6711da177e4SLinus Torvalds 6729fe4854cSDavid Woodhouse ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, 673e631ddbaSFerenc Havasi ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); 6741da177e4SLinus Torvalds if (ret) { 6751da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 6761da177e4SLinus Torvalds return ret; 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds 679ced22070SDavid Woodhouse mutex_lock(&dir_f->sem); 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds /* Build a deletion node */ 6821da177e4SLinus Torvalds rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 6831da177e4SLinus Torvalds rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); 6841da177e4SLinus Torvalds rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); 6851da177e4SLinus Torvalds rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds rd->pino = cpu_to_je32(dir_f->inocache->ino); 6881da177e4SLinus Torvalds rd->version = cpu_to_je32(++dir_f->highest_version); 6891da177e4SLinus Torvalds rd->ino = cpu_to_je32(ino); 6903a69e0cdSArtem B. Bityutskiy rd->mctime = cpu_to_je32(time); 6911da177e4SLinus Torvalds rd->nsize = namelen; 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds rd->type = type; 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); 6961da177e4SLinus Torvalds rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); 6971da177e4SLinus Torvalds 6989fe4854cSDavid Woodhouse fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds jffs2_free_raw_dirent(rd); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds if (IS_ERR(fd)) { 7031da177e4SLinus Torvalds jffs2_complete_reservation(c); 704ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 7051da177e4SLinus Torvalds return PTR_ERR(fd); 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds /* File it. This will mark the old one obsolete. */ 7091da177e4SLinus Torvalds jffs2_add_fd_to_list(c, fd, &dir_f->dents); 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds jffs2_complete_reservation(c); 712ced22070SDavid Woodhouse mutex_unlock(&dir_f->sem); 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds return 0; 7151da177e4SLinus Torvalds } 716