11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2001-2003 Red Hat, Inc. 51da177e4SLinus Torvalds * Copyright (C) 2004 Thomas Gleixner <tglx@linutronix.de> 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 81da177e4SLinus Torvalds * Modified debugged and enhanced by Thomas Gleixner <tglx@linutronix.de> 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 111da177e4SLinus Torvalds * 129b88f473SEstelle Hammache * $Id: wbuf.c,v 1.84 2005/01/25 20:11:11 hammache Exp $ 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds */ 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 191da177e4SLinus Torvalds #include <linux/crc32.h> 201da177e4SLinus Torvalds #include <linux/mtd/nand.h> 211da177e4SLinus Torvalds #include "nodelist.h" 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds /* For testing write failures */ 241da177e4SLinus Torvalds #undef BREAKME 251da177e4SLinus Torvalds #undef BREAKMEHEADER 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #ifdef BREAKME 281da177e4SLinus Torvalds static unsigned char *brokenbuf; 291da177e4SLinus Torvalds #endif 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds /* max. erase failures before we mark a block bad */ 321da177e4SLinus Torvalds #define MAX_ERASE_FAILURES 2 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds /* two seconds timeout for timed wbuf-flushing */ 351da177e4SLinus Torvalds #define WBUF_FLUSH_TIMEOUT 2 * HZ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds struct jffs2_inodirty { 381da177e4SLinus Torvalds uint32_t ino; 391da177e4SLinus Torvalds struct jffs2_inodirty *next; 401da177e4SLinus Torvalds }; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds static struct jffs2_inodirty inodirty_nomem; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds static int jffs2_wbuf_pending_for_ino(struct jffs2_sb_info *c, uint32_t ino) 451da177e4SLinus Torvalds { 461da177e4SLinus Torvalds struct jffs2_inodirty *this = c->wbuf_inodes; 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* If a malloc failed, consider _everything_ dirty */ 491da177e4SLinus Torvalds if (this == &inodirty_nomem) 501da177e4SLinus Torvalds return 1; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds /* If ino == 0, _any_ non-GC writes mean 'yes' */ 531da177e4SLinus Torvalds if (this && !ino) 541da177e4SLinus Torvalds return 1; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* Look to see if the inode in question is pending in the wbuf */ 571da177e4SLinus Torvalds while (this) { 581da177e4SLinus Torvalds if (this->ino == ino) 591da177e4SLinus Torvalds return 1; 601da177e4SLinus Torvalds this = this->next; 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds return 0; 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds static void jffs2_clear_wbuf_ino_list(struct jffs2_sb_info *c) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds struct jffs2_inodirty *this; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds this = c->wbuf_inodes; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds if (this != &inodirty_nomem) { 721da177e4SLinus Torvalds while (this) { 731da177e4SLinus Torvalds struct jffs2_inodirty *next = this->next; 741da177e4SLinus Torvalds kfree(this); 751da177e4SLinus Torvalds this = next; 761da177e4SLinus Torvalds } 771da177e4SLinus Torvalds } 781da177e4SLinus Torvalds c->wbuf_inodes = NULL; 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds static void jffs2_wbuf_dirties_inode(struct jffs2_sb_info *c, uint32_t ino) 821da177e4SLinus Torvalds { 831da177e4SLinus Torvalds struct jffs2_inodirty *new; 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* Mark the superblock dirty so that kupdated will flush... */ 861da177e4SLinus Torvalds OFNI_BS_2SFFJ(c)->s_dirt = 1; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds if (jffs2_wbuf_pending_for_ino(c, ino)) 891da177e4SLinus Torvalds return; 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds new = kmalloc(sizeof(*new), GFP_KERNEL); 921da177e4SLinus Torvalds if (!new) { 931da177e4SLinus Torvalds D1(printk(KERN_DEBUG "No memory to allocate inodirty. Fallback to all considered dirty\n")); 941da177e4SLinus Torvalds jffs2_clear_wbuf_ino_list(c); 951da177e4SLinus Torvalds c->wbuf_inodes = &inodirty_nomem; 961da177e4SLinus Torvalds return; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds new->ino = ino; 991da177e4SLinus Torvalds new->next = c->wbuf_inodes; 1001da177e4SLinus Torvalds c->wbuf_inodes = new; 1011da177e4SLinus Torvalds return; 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds static inline void jffs2_refile_wbuf_blocks(struct jffs2_sb_info *c) 1051da177e4SLinus Torvalds { 1061da177e4SLinus Torvalds struct list_head *this, *next; 1071da177e4SLinus Torvalds static int n; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds if (list_empty(&c->erasable_pending_wbuf_list)) 1101da177e4SLinus Torvalds return; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds list_for_each_safe(this, next, &c->erasable_pending_wbuf_list) { 1131da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list); 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Removing eraseblock at 0x%08x from erasable_pending_wbuf_list...\n", jeb->offset)); 1161da177e4SLinus Torvalds list_del(this); 1171da177e4SLinus Torvalds if ((jiffies + (n++)) & 127) { 1181da177e4SLinus Torvalds /* Most of the time, we just erase it immediately. Otherwise we 1191da177e4SLinus Torvalds spend ages scanning it on mount, etc. */ 1201da177e4SLinus Torvalds D1(printk(KERN_DEBUG "...and adding to erase_pending_list\n")); 1211da177e4SLinus Torvalds list_add_tail(&jeb->list, &c->erase_pending_list); 1221da177e4SLinus Torvalds c->nr_erasing_blocks++; 1231da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 1241da177e4SLinus Torvalds } else { 1251da177e4SLinus Torvalds /* Sometimes, however, we leave it elsewhere so it doesn't get 1261da177e4SLinus Torvalds immediately reused, and we spread the load a bit. */ 1271da177e4SLinus Torvalds D1(printk(KERN_DEBUG "...and adding to erasable_list\n")); 1281da177e4SLinus Torvalds list_add_tail(&jeb->list, &c->erasable_list); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1337f716cf3SEstelle Hammache #define REFILE_NOTEMPTY 0 1347f716cf3SEstelle Hammache #define REFILE_ANYWAY 1 1357f716cf3SEstelle Hammache 1367f716cf3SEstelle Hammache static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int allow_empty) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds D1(printk("About to refile bad block at %08x\n", jeb->offset)); 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds D2(jffs2_dump_block_lists(c)); 1411da177e4SLinus Torvalds /* File the existing block on the bad_used_list.... */ 1421da177e4SLinus Torvalds if (c->nextblock == jeb) 1431da177e4SLinus Torvalds c->nextblock = NULL; 1441da177e4SLinus Torvalds else /* Not sure this should ever happen... need more coffee */ 1451da177e4SLinus Torvalds list_del(&jeb->list); 1461da177e4SLinus Torvalds if (jeb->first_node) { 1471da177e4SLinus Torvalds D1(printk("Refiling block at %08x to bad_used_list\n", jeb->offset)); 1481da177e4SLinus Torvalds list_add(&jeb->list, &c->bad_used_list); 1491da177e4SLinus Torvalds } else { 1509b88f473SEstelle Hammache BUG_ON(allow_empty == REFILE_NOTEMPTY); 1511da177e4SLinus Torvalds /* It has to have had some nodes or we couldn't be here */ 1521da177e4SLinus Torvalds D1(printk("Refiling block at %08x to erase_pending_list\n", jeb->offset)); 1531da177e4SLinus Torvalds list_add(&jeb->list, &c->erase_pending_list); 1541da177e4SLinus Torvalds c->nr_erasing_blocks++; 1551da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds D2(jffs2_dump_block_lists(c)); 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* Adjust its size counts accordingly */ 1601da177e4SLinus Torvalds c->wasted_size += jeb->free_size; 1611da177e4SLinus Torvalds c->free_size -= jeb->free_size; 1621da177e4SLinus Torvalds jeb->wasted_size += jeb->free_size; 1631da177e4SLinus Torvalds jeb->free_size = 0; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 1661da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* Recover from failure to write wbuf. Recover the nodes up to the 1701da177e4SLinus Torvalds * wbuf, not the one which we were starting to try to write. */ 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds static void jffs2_wbuf_recover(struct jffs2_sb_info *c) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct jffs2_eraseblock *jeb, *new_jeb; 1751da177e4SLinus Torvalds struct jffs2_raw_node_ref **first_raw, **raw; 1761da177e4SLinus Torvalds size_t retlen; 1771da177e4SLinus Torvalds int ret; 1781da177e4SLinus Torvalds unsigned char *buf; 1791da177e4SLinus Torvalds uint32_t start, end, ofs, len; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 1841da177e4SLinus Torvalds 1857f716cf3SEstelle Hammache jffs2_block_refile(c, jeb, REFILE_NOTEMPTY); 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* Find the first node to be recovered, by skipping over every 1881da177e4SLinus Torvalds node which ends before the wbuf starts, or which is obsolete. */ 1891da177e4SLinus Torvalds first_raw = &jeb->first_node; 1901da177e4SLinus Torvalds while (*first_raw && 1911da177e4SLinus Torvalds (ref_obsolete(*first_raw) || 1921da177e4SLinus Torvalds (ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) { 1931da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n", 1941da177e4SLinus Torvalds ref_offset(*first_raw), ref_flags(*first_raw), 1951da177e4SLinus Torvalds (ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw)), 1961da177e4SLinus Torvalds c->wbuf_ofs)); 1971da177e4SLinus Torvalds first_raw = &(*first_raw)->next_phys; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds if (!*first_raw) { 2011da177e4SLinus Torvalds /* All nodes were obsolete. Nothing to recover. */ 2021da177e4SLinus Torvalds D1(printk(KERN_DEBUG "No non-obsolete nodes to be recovered. Just filing block bad\n")); 2031da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2041da177e4SLinus Torvalds return; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds start = ref_offset(*first_raw); 2081da177e4SLinus Torvalds end = ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw); 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds /* Find the last node to be recovered */ 2111da177e4SLinus Torvalds raw = first_raw; 2121da177e4SLinus Torvalds while ((*raw)) { 2131da177e4SLinus Torvalds if (!ref_obsolete(*raw)) 2141da177e4SLinus Torvalds end = ref_offset(*raw) + ref_totlen(c, jeb, *raw); 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds raw = &(*raw)->next_phys; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds D1(printk(KERN_DEBUG "wbuf recover %08x-%08x\n", start, end)); 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds buf = NULL; 2231da177e4SLinus Torvalds if (start < c->wbuf_ofs) { 2241da177e4SLinus Torvalds /* First affected node was already partially written. 2251da177e4SLinus Torvalds * Attempt to reread the old data into our buffer. */ 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds buf = kmalloc(end - start, GFP_KERNEL); 2281da177e4SLinus Torvalds if (!buf) { 2291da177e4SLinus Torvalds printk(KERN_CRIT "Malloc failure in wbuf recovery. Data loss ensues.\n"); 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds goto read_failed; 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds /* Do the read... */ 2351da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 2361da177e4SLinus Torvalds ret = c->mtd->read_ecc(c->mtd, start, c->wbuf_ofs - start, &retlen, buf, NULL, c->oobinfo); 2371da177e4SLinus Torvalds else 2381da177e4SLinus Torvalds ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf); 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) { 2411da177e4SLinus Torvalds /* ECC recovered */ 2421da177e4SLinus Torvalds ret = 0; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds if (ret || retlen != c->wbuf_ofs - start) { 2451da177e4SLinus Torvalds printk(KERN_CRIT "Old data are already lost in wbuf recovery. Data loss ensues.\n"); 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds kfree(buf); 2481da177e4SLinus Torvalds buf = NULL; 2491da177e4SLinus Torvalds read_failed: 2501da177e4SLinus Torvalds first_raw = &(*first_raw)->next_phys; 2511da177e4SLinus Torvalds /* If this was the only node to be recovered, give up */ 2521da177e4SLinus Torvalds if (!(*first_raw)) 2531da177e4SLinus Torvalds return; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds /* It wasn't. Go on and try to recover nodes complete in the wbuf */ 2561da177e4SLinus Torvalds start = ref_offset(*first_raw); 2571da177e4SLinus Torvalds } else { 2581da177e4SLinus Torvalds /* Read succeeded. Copy the remaining data from the wbuf */ 2591da177e4SLinus Torvalds memcpy(buf + (c->wbuf_ofs - start), c->wbuf, end - c->wbuf_ofs); 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds /* OK... we're to rewrite (end-start) bytes of data from first_raw onwards. 2631da177e4SLinus Torvalds Either 'buf' contains the data, or we find it in the wbuf */ 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds /* ... and get an allocation of space from a shiny new block instead */ 2671da177e4SLinus Torvalds ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len); 2681da177e4SLinus Torvalds if (ret) { 2691da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n"); 2701da177e4SLinus Torvalds kfree(buf); 2711da177e4SLinus Torvalds return; 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds if (end-start >= c->wbuf_pagesize) { 2747f716cf3SEstelle Hammache /* Need to do another write immediately, but it's possible 2757f716cf3SEstelle Hammache that this is just because the wbuf itself is completely 2767f716cf3SEstelle Hammache full, and there's nothing earlier read back from the 2777f716cf3SEstelle Hammache flash. Hence 'buf' isn't necessarily what we're writing 2787f716cf3SEstelle Hammache from. */ 2797f716cf3SEstelle Hammache unsigned char *rewrite_buf = buf?:c->wbuf; 2801da177e4SLinus Torvalds uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize); 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n", 2831da177e4SLinus Torvalds towrite, ofs)); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds #ifdef BREAKMEHEADER 2861da177e4SLinus Torvalds static int breakme; 2871da177e4SLinus Torvalds if (breakme++ == 20) { 2881da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs); 2891da177e4SLinus Torvalds breakme = 0; 2901da177e4SLinus Torvalds c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen, 2911da177e4SLinus Torvalds brokenbuf, NULL, c->oobinfo); 2921da177e4SLinus Torvalds ret = -EIO; 2931da177e4SLinus Torvalds } else 2941da177e4SLinus Torvalds #endif 2951da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 2961da177e4SLinus Torvalds ret = c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen, 2977f716cf3SEstelle Hammache rewrite_buf, NULL, c->oobinfo); 2981da177e4SLinus Torvalds else 2997f716cf3SEstelle Hammache ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, rewrite_buf); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (ret || retlen != towrite) { 3021da177e4SLinus Torvalds /* Argh. We tried. Really we did. */ 3031da177e4SLinus Torvalds printk(KERN_CRIT "Recovery of wbuf failed due to a second write error\n"); 3041da177e4SLinus Torvalds kfree(buf); 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds if (retlen) { 3071da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw2; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds raw2 = jffs2_alloc_raw_node_ref(); 3101da177e4SLinus Torvalds if (!raw2) 3111da177e4SLinus Torvalds return; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds raw2->flash_offset = ofs | REF_OBSOLETE; 3141da177e4SLinus Torvalds raw2->__totlen = ref_totlen(c, jeb, *first_raw); 3151da177e4SLinus Torvalds raw2->next_phys = NULL; 3161da177e4SLinus Torvalds raw2->next_in_ino = NULL; 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds jffs2_add_physical_node_ref(c, raw2); 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds return; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds printk(KERN_NOTICE "Recovery of wbuf succeeded to %08x\n", ofs); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds c->wbuf_len = (end - start) - towrite; 3251da177e4SLinus Torvalds c->wbuf_ofs = ofs + towrite; 3267f716cf3SEstelle Hammache memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len); 3271da177e4SLinus Torvalds /* Don't muck about with c->wbuf_inodes. False positives are harmless. */ 3287f716cf3SEstelle Hammache if (buf) 3291da177e4SLinus Torvalds kfree(buf); 3301da177e4SLinus Torvalds } else { 3311da177e4SLinus Torvalds /* OK, now we're left with the dregs in whichever buffer we're using */ 3321da177e4SLinus Torvalds if (buf) { 3331da177e4SLinus Torvalds memcpy(c->wbuf, buf, end-start); 3341da177e4SLinus Torvalds kfree(buf); 3351da177e4SLinus Torvalds } else { 3361da177e4SLinus Torvalds memmove(c->wbuf, c->wbuf + (start - c->wbuf_ofs), end - start); 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds c->wbuf_ofs = ofs; 3391da177e4SLinus Torvalds c->wbuf_len = end - start; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds /* Now sort out the jffs2_raw_node_refs, moving them from the old to the next block */ 3431da177e4SLinus Torvalds new_jeb = &c->blocks[ofs / c->sector_size]; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3461da177e4SLinus Torvalds if (new_jeb->first_node) { 3471da177e4SLinus Torvalds /* Odd, but possible with ST flash later maybe */ 3481da177e4SLinus Torvalds new_jeb->last_node->next_phys = *first_raw; 3491da177e4SLinus Torvalds } else { 3501da177e4SLinus Torvalds new_jeb->first_node = *first_raw; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds raw = first_raw; 3541da177e4SLinus Torvalds while (*raw) { 3551da177e4SLinus Torvalds uint32_t rawlen = ref_totlen(c, jeb, *raw); 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Refiling block of %08x at %08x(%d) to %08x\n", 3581da177e4SLinus Torvalds rawlen, ref_offset(*raw), ref_flags(*raw), ofs)); 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds if (ref_obsolete(*raw)) { 3611da177e4SLinus Torvalds /* Shouldn't really happen much */ 3621da177e4SLinus Torvalds new_jeb->dirty_size += rawlen; 3631da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3641da177e4SLinus Torvalds c->dirty_size += rawlen; 3651da177e4SLinus Torvalds } else { 3661da177e4SLinus Torvalds new_jeb->used_size += rawlen; 3671da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3681da177e4SLinus Torvalds jeb->dirty_size += rawlen; 3691da177e4SLinus Torvalds jeb->used_size -= rawlen; 3701da177e4SLinus Torvalds c->dirty_size += rawlen; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds c->free_size -= rawlen; 3731da177e4SLinus Torvalds (*raw)->flash_offset = ofs | ref_flags(*raw); 3741da177e4SLinus Torvalds ofs += rawlen; 3751da177e4SLinus Torvalds new_jeb->last_node = *raw; 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds raw = &(*raw)->next_phys; 3781da177e4SLinus Torvalds } 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds /* Fix up the original jeb now it's on the bad_list */ 3811da177e4SLinus Torvalds *first_raw = NULL; 3821da177e4SLinus Torvalds if (first_raw == &jeb->first_node) { 3831da177e4SLinus Torvalds jeb->last_node = NULL; 3841da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failing block at %08x is now empty. Moving to erase_pending_list\n", jeb->offset)); 3851da177e4SLinus Torvalds list_del(&jeb->list); 3861da177e4SLinus Torvalds list_add(&jeb->list, &c->erase_pending_list); 3871da177e4SLinus Torvalds c->nr_erasing_blocks++; 3881da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds else 3911da177e4SLinus Torvalds jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,jeb); 3941da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(jeb)); 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds ACCT_SANITY_CHECK(c,new_jeb); 3971da177e4SLinus Torvalds D1(ACCT_PARANOIA_CHECK(new_jeb)); 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds D1(printk(KERN_DEBUG "wbuf recovery completed OK\n")); 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds /* Meaning of pad argument: 4051da177e4SLinus Torvalds 0: Do not pad. Probably pointless - we only ever use this when we can't pad anyway. 4061da177e4SLinus Torvalds 1: Pad, do not adjust nextblock free_size 4071da177e4SLinus Torvalds 2: Pad, adjust nextblock free_size 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds #define NOPAD 0 4101da177e4SLinus Torvalds #define PAD_NOACCOUNT 1 4111da177e4SLinus Torvalds #define PAD_ACCOUNTING 2 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad) 4141da177e4SLinus Torvalds { 4151da177e4SLinus Torvalds int ret; 4161da177e4SLinus Torvalds size_t retlen; 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds /* Nothing to do if not NAND flash. In particular, we shouldn't 4191da177e4SLinus Torvalds del_timer() the timer we never initialised. */ 4201da177e4SLinus Torvalds if (jffs2_can_mark_obsolete(c)) 4211da177e4SLinus Torvalds return 0; 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds if (!down_trylock(&c->alloc_sem)) { 4241da177e4SLinus Torvalds up(&c->alloc_sem); 4251da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n"); 4261da177e4SLinus Torvalds BUG(); 4271da177e4SLinus Torvalds } 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds if(!c->wbuf || !c->wbuf_len) 4301da177e4SLinus Torvalds return 0; 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* claim remaining space on the page 4331da177e4SLinus Torvalds this happens, if we have a change to a new block, 4341da177e4SLinus Torvalds or if fsync forces us to flush the writebuffer. 4351da177e4SLinus Torvalds if we have a switch to next page, we will not have 4361da177e4SLinus Torvalds enough remaining space for this. 4371da177e4SLinus Torvalds */ 4381da177e4SLinus Torvalds if (pad) { 4391da177e4SLinus Torvalds c->wbuf_len = PAD(c->wbuf_len); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR 4421da177e4SLinus Torvalds with 8 byte page size */ 4431da177e4SLinus Torvalds memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len); 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) { 4461da177e4SLinus Torvalds struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len); 4471da177e4SLinus Torvalds padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4481da177e4SLinus Torvalds padnode->nodetype = cpu_to_je16(JFFS2_NODETYPE_PADDING); 4491da177e4SLinus Torvalds padnode->totlen = cpu_to_je32(c->wbuf_pagesize - c->wbuf_len); 4501da177e4SLinus Torvalds padnode->hdr_crc = cpu_to_je32(crc32(0, padnode, sizeof(*padnode)-4)); 4511da177e4SLinus Torvalds } 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds /* else jffs2_flash_writev has actually filled in the rest of the 4541da177e4SLinus Torvalds buffer for us, and will deal with the node refs etc. later. */ 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds #ifdef BREAKME 4571da177e4SLinus Torvalds static int breakme; 4581da177e4SLinus Torvalds if (breakme++ == 20) { 4591da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs); 4601da177e4SLinus Torvalds breakme = 0; 4611da177e4SLinus Torvalds c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, 4621da177e4SLinus Torvalds &retlen, brokenbuf, NULL, c->oobinfo); 4631da177e4SLinus Torvalds ret = -EIO; 4641da177e4SLinus Torvalds } else 4651da177e4SLinus Torvalds #endif 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 4681da177e4SLinus Torvalds ret = c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf, NULL, c->oobinfo); 4691da177e4SLinus Torvalds else 4701da177e4SLinus Torvalds ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf); 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds if (ret || retlen != c->wbuf_pagesize) { 4731da177e4SLinus Torvalds if (ret) 4741da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n",ret); 4751da177e4SLinus Torvalds else { 4761da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n", 4771da177e4SLinus Torvalds retlen, c->wbuf_pagesize); 4781da177e4SLinus Torvalds ret = -EIO; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds jffs2_wbuf_recover(c); 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds return ret; 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds /* Adjust free size of the block if we padded. */ 4891da177e4SLinus Torvalds if (pad) { 4901da177e4SLinus Torvalds struct jffs2_eraseblock *jeb; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n", 4951da177e4SLinus Torvalds (jeb==c->nextblock)?"next":"", jeb->offset)); 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds /* wbuf_pagesize - wbuf_len is the amount of space that's to be 4981da177e4SLinus Torvalds padded. If there is less free space in the block than that, 4991da177e4SLinus Torvalds something screwed up */ 5001da177e4SLinus Torvalds if (jeb->free_size < (c->wbuf_pagesize - c->wbuf_len)) { 5011da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n", 5021da177e4SLinus Torvalds c->wbuf_ofs, c->wbuf_len, c->wbuf_pagesize-c->wbuf_len); 5031da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n", 5041da177e4SLinus Torvalds jeb->offset, jeb->free_size); 5051da177e4SLinus Torvalds BUG(); 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds jeb->free_size -= (c->wbuf_pagesize - c->wbuf_len); 5081da177e4SLinus Torvalds c->free_size -= (c->wbuf_pagesize - c->wbuf_len); 5091da177e4SLinus Torvalds jeb->wasted_size += (c->wbuf_pagesize - c->wbuf_len); 5101da177e4SLinus Torvalds c->wasted_size += (c->wbuf_pagesize - c->wbuf_len); 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds /* Stick any now-obsoleted blocks on the erase_pending_list */ 5141da177e4SLinus Torvalds jffs2_refile_wbuf_blocks(c); 5151da177e4SLinus Torvalds jffs2_clear_wbuf_ino_list(c); 5161da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 5191da177e4SLinus Torvalds /* adjust write buffer offset, else we get a non contiguous write bug */ 5201da177e4SLinus Torvalds c->wbuf_ofs += c->wbuf_pagesize; 5211da177e4SLinus Torvalds c->wbuf_len = 0; 5221da177e4SLinus Torvalds return 0; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds /* Trigger garbage collection to flush the write-buffer. 5261da177e4SLinus Torvalds If ino arg is zero, do it if _any_ real (i.e. not GC) writes are 5271da177e4SLinus Torvalds outstanding. If ino arg non-zero, do it only if a write for the 5281da177e4SLinus Torvalds given inode is outstanding. */ 5291da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds uint32_t old_wbuf_ofs; 5321da177e4SLinus Torvalds uint32_t old_wbuf_len; 5331da177e4SLinus Torvalds int ret = 0; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() called for ino #%u...\n", ino)); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds down(&c->alloc_sem); 5381da177e4SLinus Torvalds if (!jffs2_wbuf_pending_for_ino(c, ino)) { 5391da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino)); 5401da177e4SLinus Torvalds up(&c->alloc_sem); 5411da177e4SLinus Torvalds return 0; 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds old_wbuf_ofs = c->wbuf_ofs; 5451da177e4SLinus Torvalds old_wbuf_len = c->wbuf_len; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds if (c->unchecked_size) { 5481da177e4SLinus Torvalds /* GC won't make any progress for a while */ 5491da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() padding. Not finished checking\n")); 5501da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5511da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5527f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5537f716cf3SEstelle Hammache left some data in the wbuf */ 5547f716cf3SEstelle Hammache if (ret) 5557f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5561da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5571da177e4SLinus Torvalds } else while (old_wbuf_len && 5581da177e4SLinus Torvalds old_wbuf_ofs == c->wbuf_ofs) { 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds up(&c->alloc_sem); 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n")); 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds ret = jffs2_garbage_collect_pass(c); 5651da177e4SLinus Torvalds if (ret) { 5661da177e4SLinus Torvalds /* GC failed. Flush it with padding instead */ 5671da177e4SLinus Torvalds down(&c->alloc_sem); 5681da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5691da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5707f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5717f716cf3SEstelle Hammache left some data in the wbuf */ 5727f716cf3SEstelle Hammache if (ret) 5737f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5741da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5751da177e4SLinus Torvalds break; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds down(&c->alloc_sem); 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n")); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds up(&c->alloc_sem); 5831da177e4SLinus Torvalds return ret; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds /* Pad write-buffer to end and write it, wasting space. */ 5871da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) 5881da177e4SLinus Torvalds { 5891da177e4SLinus Torvalds int ret; 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5921da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 5937f716cf3SEstelle Hammache /* retry - maybe wbuf recover left some data in wbuf. */ 5947f716cf3SEstelle Hammache if (ret) 5957f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 5961da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds return ret; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds #define PAGE_DIV(x) ( (x) & (~(c->wbuf_pagesize - 1)) ) 6021da177e4SLinus Torvalds #define PAGE_MOD(x) ( (x) & (c->wbuf_pagesize - 1) ) 6031da177e4SLinus Torvalds int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino) 6041da177e4SLinus Torvalds { 6051da177e4SLinus Torvalds struct kvec outvecs[3]; 6061da177e4SLinus Torvalds uint32_t totlen = 0; 6071da177e4SLinus Torvalds uint32_t split_ofs = 0; 6081da177e4SLinus Torvalds uint32_t old_totlen; 6091da177e4SLinus Torvalds int ret, splitvec = -1; 6101da177e4SLinus Torvalds int invec, outvec; 6111da177e4SLinus Torvalds size_t wbuf_retlen; 6121da177e4SLinus Torvalds unsigned char *wbuf_ptr; 6131da177e4SLinus Torvalds size_t donelen = 0; 6141da177e4SLinus Torvalds uint32_t outvec_to = to; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds /* If not NAND flash, don't bother */ 6171da177e4SLinus Torvalds if (!c->wbuf) 6181da177e4SLinus Torvalds return jffs2_flash_direct_writev(c, invecs, count, to, retlen); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds down_write(&c->wbuf_sem); 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds /* If wbuf_ofs is not initialized, set it to target address */ 6231da177e4SLinus Torvalds if (c->wbuf_ofs == 0xFFFFFFFF) { 6241da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6251da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6261da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds /* Fixup the wbuf if we are moving to a new eraseblock. The checks below 6301da177e4SLinus Torvalds fail for ECC'd NOR because cleanmarker == 16, so a block starts at 6311da177e4SLinus Torvalds xxx0010. */ 6321da177e4SLinus Torvalds if (jffs2_nor_ecc(c)) { 6331da177e4SLinus Torvalds if (((c->wbuf_ofs % c->sector_size) == 0) && !c->wbuf_len) { 6341da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6351da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6361da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds /* Sanity checks on target address. 6411da177e4SLinus Torvalds It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs), 6421da177e4SLinus Torvalds and it's permitted to write at the beginning of a new 6431da177e4SLinus Torvalds erase block. Anything else, and you die. 6441da177e4SLinus Torvalds New block starts at xxx000c (0-b = block header) 6451da177e4SLinus Torvalds */ 6461da177e4SLinus Torvalds if ( (to & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) ) { 6471da177e4SLinus Torvalds /* It's a write to a new block */ 6481da177e4SLinus Torvalds if (c->wbuf_len) { 6491da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs)); 6501da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 6511da177e4SLinus Torvalds if (ret) { 6521da177e4SLinus Torvalds /* the underlying layer has to check wbuf_len to do the cleanup */ 6531da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret)); 6541da177e4SLinus Torvalds *retlen = 0; 6551da177e4SLinus Torvalds goto exit; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds /* set pointer to new block */ 6591da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6601da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6611da177e4SLinus Torvalds } 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { 6641da177e4SLinus Torvalds /* We're not writing immediately after the writebuffer. Bad. */ 6651da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write to %08lx\n", (unsigned long)to); 6661da177e4SLinus Torvalds if (c->wbuf_len) 6671da177e4SLinus Torvalds printk(KERN_CRIT "wbuf was previously %08x-%08x\n", 6681da177e4SLinus Torvalds c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); 6691da177e4SLinus Torvalds BUG(); 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds /* Note outvecs[3] above. We know count is never greater than 2 */ 6731da177e4SLinus Torvalds if (count > 2) { 6741da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flash_writev(): count is %ld\n", count); 6751da177e4SLinus Torvalds BUG(); 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds invec = 0; 6791da177e4SLinus Torvalds outvec = 0; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds /* Fill writebuffer first, if already in use */ 6821da177e4SLinus Torvalds if (c->wbuf_len) { 6831da177e4SLinus Torvalds uint32_t invec_ofs = 0; 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /* adjust alignment offset */ 6861da177e4SLinus Torvalds if (c->wbuf_len != PAGE_MOD(to)) { 6871da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6881da177e4SLinus Torvalds /* take care of alignment to next page */ 6891da177e4SLinus Torvalds if (!c->wbuf_len) 6901da177e4SLinus Torvalds c->wbuf_len = c->wbuf_pagesize; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds while(c->wbuf_len < c->wbuf_pagesize) { 6941da177e4SLinus Torvalds uint32_t thislen; 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds if (invec == count) 6971da177e4SLinus Torvalds goto alldone; 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds thislen = c->wbuf_pagesize - c->wbuf_len; 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds if (thislen >= invecs[invec].iov_len) 7021da177e4SLinus Torvalds thislen = invecs[invec].iov_len; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds invec_ofs = thislen; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds memcpy(c->wbuf + c->wbuf_len, invecs[invec].iov_base, thislen); 7071da177e4SLinus Torvalds c->wbuf_len += thislen; 7081da177e4SLinus Torvalds donelen += thislen; 7091da177e4SLinus Torvalds /* Get next invec, if actual did not fill the buffer */ 7101da177e4SLinus Torvalds if (c->wbuf_len < c->wbuf_pagesize) 7111da177e4SLinus Torvalds invec++; 7121da177e4SLinus Torvalds } 7131da177e4SLinus Torvalds 7141da177e4SLinus Torvalds /* write buffer is full, flush buffer */ 7151da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, NOPAD); 7161da177e4SLinus Torvalds if (ret) { 7171da177e4SLinus Torvalds /* the underlying layer has to check wbuf_len to do the cleanup */ 7181da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret)); 7191da177e4SLinus Torvalds /* Retlen zero to make sure our caller doesn't mark the space dirty. 7201da177e4SLinus Torvalds We've already done everything that's necessary */ 7211da177e4SLinus Torvalds *retlen = 0; 7221da177e4SLinus Torvalds goto exit; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds outvec_to += donelen; 7251da177e4SLinus Torvalds c->wbuf_ofs = outvec_to; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds /* All invecs done ? */ 7281da177e4SLinus Torvalds if (invec == count) 7291da177e4SLinus Torvalds goto alldone; 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds /* Set up the first outvec, containing the remainder of the 7321da177e4SLinus Torvalds invec we partially used */ 7331da177e4SLinus Torvalds if (invecs[invec].iov_len > invec_ofs) { 7341da177e4SLinus Torvalds outvecs[0].iov_base = invecs[invec].iov_base+invec_ofs; 7351da177e4SLinus Torvalds totlen = outvecs[0].iov_len = invecs[invec].iov_len-invec_ofs; 7361da177e4SLinus Torvalds if (totlen > c->wbuf_pagesize) { 7371da177e4SLinus Torvalds splitvec = outvec; 7381da177e4SLinus Torvalds split_ofs = outvecs[0].iov_len - PAGE_MOD(totlen); 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds outvec++; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds invec++; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds /* OK, now we've flushed the wbuf and the start of the bits 7461da177e4SLinus Torvalds we have been asked to write, now to write the rest.... */ 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds /* totlen holds the amount of data still to be written */ 7491da177e4SLinus Torvalds old_totlen = totlen; 7501da177e4SLinus Torvalds for ( ; invec < count; invec++,outvec++ ) { 7511da177e4SLinus Torvalds outvecs[outvec].iov_base = invecs[invec].iov_base; 7521da177e4SLinus Torvalds totlen += outvecs[outvec].iov_len = invecs[invec].iov_len; 7531da177e4SLinus Torvalds if (PAGE_DIV(totlen) != PAGE_DIV(old_totlen)) { 7541da177e4SLinus Torvalds splitvec = outvec; 7551da177e4SLinus Torvalds split_ofs = outvecs[outvec].iov_len - PAGE_MOD(totlen); 7561da177e4SLinus Torvalds old_totlen = totlen; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds /* Now the outvecs array holds all the remaining data to write */ 7611da177e4SLinus Torvalds /* Up to splitvec,split_ofs is to be written immediately. The rest 7621da177e4SLinus Torvalds goes into the (now-empty) wbuf */ 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds if (splitvec != -1) { 7651da177e4SLinus Torvalds uint32_t remainder; 7661da177e4SLinus Torvalds 7671da177e4SLinus Torvalds remainder = outvecs[splitvec].iov_len - split_ofs; 7681da177e4SLinus Torvalds outvecs[splitvec].iov_len = split_ofs; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds /* We did cross a page boundary, so we write some now */ 7711da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 7721da177e4SLinus Torvalds ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo); 7731da177e4SLinus Torvalds else 7741da177e4SLinus Torvalds ret = jffs2_flash_direct_writev(c, outvecs, splitvec+1, outvec_to, &wbuf_retlen); 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds if (ret < 0 || wbuf_retlen != PAGE_DIV(totlen)) { 7771da177e4SLinus Torvalds /* At this point we have no problem, 7787f716cf3SEstelle Hammache c->wbuf is empty. However refile nextblock to avoid 7797f716cf3SEstelle Hammache writing again to same address. 7801da177e4SLinus Torvalds */ 7817f716cf3SEstelle Hammache struct jffs2_eraseblock *jeb; 7827f716cf3SEstelle Hammache 7837f716cf3SEstelle Hammache spin_lock(&c->erase_completion_lock); 7847f716cf3SEstelle Hammache 7857f716cf3SEstelle Hammache jeb = &c->blocks[outvec_to / c->sector_size]; 7867f716cf3SEstelle Hammache jffs2_block_refile(c, jeb, REFILE_ANYWAY); 7877f716cf3SEstelle Hammache 7887f716cf3SEstelle Hammache *retlen = 0; 7897f716cf3SEstelle Hammache spin_unlock(&c->erase_completion_lock); 7901da177e4SLinus Torvalds goto exit; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds donelen += wbuf_retlen; 7941da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(outvec_to) + PAGE_DIV(totlen); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds if (remainder) { 7971da177e4SLinus Torvalds outvecs[splitvec].iov_base += split_ofs; 7981da177e4SLinus Torvalds outvecs[splitvec].iov_len = remainder; 7991da177e4SLinus Torvalds } else { 8001da177e4SLinus Torvalds splitvec++; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds } else { 8041da177e4SLinus Torvalds splitvec = 0; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds /* Now splitvec points to the start of the bits we have to copy 8081da177e4SLinus Torvalds into the wbuf */ 8091da177e4SLinus Torvalds wbuf_ptr = c->wbuf; 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds for ( ; splitvec < outvec; splitvec++) { 8121da177e4SLinus Torvalds /* Don't copy the wbuf into itself */ 8131da177e4SLinus Torvalds if (outvecs[splitvec].iov_base == c->wbuf) 8141da177e4SLinus Torvalds continue; 8151da177e4SLinus Torvalds memcpy(wbuf_ptr, outvecs[splitvec].iov_base, outvecs[splitvec].iov_len); 8161da177e4SLinus Torvalds wbuf_ptr += outvecs[splitvec].iov_len; 8171da177e4SLinus Torvalds donelen += outvecs[splitvec].iov_len; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds c->wbuf_len = wbuf_ptr - c->wbuf; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds /* If there's a remainder in the wbuf and it's a non-GC write, 8221da177e4SLinus Torvalds remember that the wbuf affects this ino */ 8231da177e4SLinus Torvalds alldone: 8241da177e4SLinus Torvalds *retlen = donelen; 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds if (c->wbuf_len && ino) 8271da177e4SLinus Torvalds jffs2_wbuf_dirties_inode(c, ino); 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds ret = 0; 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds exit: 8321da177e4SLinus Torvalds up_write(&c->wbuf_sem); 8331da177e4SLinus Torvalds return ret; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds /* 8371da177e4SLinus Torvalds * This is the entry for flash write. 8381da177e4SLinus Torvalds * Check, if we work on NAND FLASH, if so build an kvec and write it via vritev 8391da177e4SLinus Torvalds */ 8401da177e4SLinus Torvalds int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf) 8411da177e4SLinus Torvalds { 8421da177e4SLinus Torvalds struct kvec vecs[1]; 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds if (jffs2_can_mark_obsolete(c)) 8451da177e4SLinus Torvalds return c->mtd->write(c->mtd, ofs, len, retlen, buf); 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds vecs[0].iov_base = (unsigned char *) buf; 8481da177e4SLinus Torvalds vecs[0].iov_len = len; 8491da177e4SLinus Torvalds return jffs2_flash_writev(c, vecs, 1, ofs, retlen, 0); 8501da177e4SLinus Torvalds } 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds /* 8531da177e4SLinus Torvalds Handle readback from writebuffer and ECC failure return 8541da177e4SLinus Torvalds */ 8551da177e4SLinus Torvalds int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf) 8561da177e4SLinus Torvalds { 8571da177e4SLinus Torvalds loff_t orbf = 0, owbf = 0, lwbf = 0; 8581da177e4SLinus Torvalds int ret; 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds /* Read flash */ 8611da177e4SLinus Torvalds if (!jffs2_can_mark_obsolete(c)) { 8621da177e4SLinus Torvalds down_read(&c->wbuf_sem); 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 8651da177e4SLinus Torvalds ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo); 8661da177e4SLinus Torvalds else 8671da177e4SLinus Torvalds ret = c->mtd->read(c->mtd, ofs, len, retlen, buf); 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds if ( (ret == -EBADMSG) && (*retlen == len) ) { 8701da177e4SLinus Torvalds printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n", 8711da177e4SLinus Torvalds len, ofs); 8721da177e4SLinus Torvalds /* 8731da177e4SLinus Torvalds * We have the raw data without ECC correction in the buffer, maybe 8741da177e4SLinus Torvalds * we are lucky and all data or parts are correct. We check the node. 8751da177e4SLinus Torvalds * If data are corrupted node check will sort it out. 8761da177e4SLinus Torvalds * We keep this block, it will fail on write or erase and the we 8771da177e4SLinus Torvalds * mark it bad. Or should we do that now? But we should give him a chance. 8781da177e4SLinus Torvalds * Maybe we had a system crash or power loss before the ecc write or 8791da177e4SLinus Torvalds * a erase was completed. 8801da177e4SLinus Torvalds * So we return success. :) 8811da177e4SLinus Torvalds */ 8821da177e4SLinus Torvalds ret = 0; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds } else 8851da177e4SLinus Torvalds return c->mtd->read(c->mtd, ofs, len, retlen, buf); 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds /* if no writebuffer available or write buffer empty, return */ 8881da177e4SLinus Torvalds if (!c->wbuf_pagesize || !c->wbuf_len) 8891da177e4SLinus Torvalds goto exit; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds /* if we read in a different block, return */ 8921da177e4SLinus Torvalds if ( (ofs & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) ) 8931da177e4SLinus Torvalds goto exit; 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds if (ofs >= c->wbuf_ofs) { 8961da177e4SLinus Torvalds owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */ 8971da177e4SLinus Torvalds if (owbf > c->wbuf_len) /* is read beyond write buffer ? */ 8981da177e4SLinus Torvalds goto exit; 8991da177e4SLinus Torvalds lwbf = c->wbuf_len - owbf; /* number of bytes to copy */ 9001da177e4SLinus Torvalds if (lwbf > len) 9011da177e4SLinus Torvalds lwbf = len; 9021da177e4SLinus Torvalds } else { 9031da177e4SLinus Torvalds orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */ 9041da177e4SLinus Torvalds if (orbf > len) /* is write beyond write buffer ? */ 9051da177e4SLinus Torvalds goto exit; 9061da177e4SLinus Torvalds lwbf = len - orbf; /* number of bytes to copy */ 9071da177e4SLinus Torvalds if (lwbf > c->wbuf_len) 9081da177e4SLinus Torvalds lwbf = c->wbuf_len; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds if (lwbf > 0) 9111da177e4SLinus Torvalds memcpy(buf+orbf,c->wbuf+owbf,lwbf); 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds exit: 9141da177e4SLinus Torvalds up_read(&c->wbuf_sem); 9151da177e4SLinus Torvalds return ret; 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds /* 9191da177e4SLinus Torvalds * Check, if the out of band area is empty 9201da177e4SLinus Torvalds */ 9211da177e4SLinus Torvalds int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode) 9221da177e4SLinus Torvalds { 9231da177e4SLinus Torvalds unsigned char *buf; 9241da177e4SLinus Torvalds int ret = 0; 9251da177e4SLinus Torvalds int i,len,page; 9261da177e4SLinus Torvalds size_t retlen; 9271da177e4SLinus Torvalds int oob_size; 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds /* allocate a buffer for all oob data in this sector */ 9301da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 9311da177e4SLinus Torvalds len = 4 * oob_size; 9321da177e4SLinus Torvalds buf = kmalloc(len, GFP_KERNEL); 9331da177e4SLinus Torvalds if (!buf) { 9341da177e4SLinus Torvalds printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n"); 9351da177e4SLinus Torvalds return -ENOMEM; 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds /* 9381da177e4SLinus Torvalds * if mode = 0, we scan for a total empty oob area, else we have 9391da177e4SLinus Torvalds * to take care of the cleanmarker in the first page of the block 9401da177e4SLinus Torvalds */ 9411da177e4SLinus Torvalds ret = jffs2_flash_read_oob(c, jeb->offset, len , &retlen, buf); 9421da177e4SLinus Torvalds if (ret) { 9431da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 9441da177e4SLinus Torvalds goto out; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds 9471da177e4SLinus Torvalds if (retlen < len) { 9481da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read " 9491da177e4SLinus Torvalds "(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset)); 9501da177e4SLinus Torvalds ret = -EIO; 9511da177e4SLinus Torvalds goto out; 9521da177e4SLinus Torvalds } 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds /* Special check for first page */ 9551da177e4SLinus Torvalds for(i = 0; i < oob_size ; i++) { 9561da177e4SLinus Torvalds /* Yeah, we know about the cleanmarker. */ 9571da177e4SLinus Torvalds if (mode && i >= c->fsdata_pos && 9581da177e4SLinus Torvalds i < c->fsdata_pos + c->fsdata_len) 9591da177e4SLinus Torvalds continue; 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds if (buf[i] != 0xFF) { 9621da177e4SLinus Torvalds D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n", 9631da177e4SLinus Torvalds buf[page+i], page+i, jeb->offset)); 9641da177e4SLinus Torvalds ret = 1; 9651da177e4SLinus Torvalds goto out; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds /* we know, we are aligned :) */ 9701da177e4SLinus Torvalds for (page = oob_size; page < len; page += sizeof(long)) { 9711da177e4SLinus Torvalds unsigned long dat = *(unsigned long *)(&buf[page]); 9721da177e4SLinus Torvalds if(dat != -1) { 9731da177e4SLinus Torvalds ret = 1; 9741da177e4SLinus Torvalds goto out; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds out: 9791da177e4SLinus Torvalds kfree(buf); 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds return ret; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds /* 9851da177e4SLinus Torvalds * Scan for a valid cleanmarker and for bad blocks 9861da177e4SLinus Torvalds * For virtual blocks (concatenated physical blocks) check the cleanmarker 9871da177e4SLinus Torvalds * only in the first page of the first physical block, but scan for bad blocks in all 9881da177e4SLinus Torvalds * physical blocks 9891da177e4SLinus Torvalds */ 9901da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 9911da177e4SLinus Torvalds { 9921da177e4SLinus Torvalds struct jffs2_unknown_node n; 9931da177e4SLinus Torvalds unsigned char buf[2 * NAND_MAX_OOBSIZE]; 9941da177e4SLinus Torvalds unsigned char *p; 9951da177e4SLinus Torvalds int ret, i, cnt, retval = 0; 9961da177e4SLinus Torvalds size_t retlen, offset; 9971da177e4SLinus Torvalds int oob_size; 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds offset = jeb->offset; 10001da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds /* Loop through the physical blocks */ 10031da177e4SLinus Torvalds for (cnt = 0; cnt < (c->sector_size / c->mtd->erasesize); cnt++) { 10041da177e4SLinus Torvalds /* Check first if the block is bad. */ 10051da177e4SLinus Torvalds if (c->mtd->block_isbad (c->mtd, offset)) { 10061da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Bad block at %08x\n", jeb->offset)); 10071da177e4SLinus Torvalds return 2; 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds /* 10101da177e4SLinus Torvalds * We read oob data from page 0 and 1 of the block. 10111da177e4SLinus Torvalds * page 0 contains cleanmarker and badblock info 10121da177e4SLinus Torvalds * page 1 contains failure count of this block 10131da177e4SLinus Torvalds */ 10141da177e4SLinus Torvalds ret = c->mtd->read_oob (c->mtd, offset, oob_size << 1, &retlen, buf); 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds if (ret) { 10171da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 10181da177e4SLinus Torvalds return ret; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds if (retlen < (oob_size << 1)) { 10211da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB return short read (%zd bytes not %d) for block at %08x\n", retlen, oob_size << 1, jeb->offset)); 10221da177e4SLinus Torvalds return -EIO; 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds /* Check cleanmarker only on the first physical block */ 10261da177e4SLinus Torvalds if (!cnt) { 10271da177e4SLinus Torvalds n.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK); 10281da177e4SLinus Torvalds n.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER); 10291da177e4SLinus Torvalds n.totlen = cpu_to_je32 (8); 10301da177e4SLinus Torvalds p = (unsigned char *) &n; 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds for (i = 0; i < c->fsdata_len; i++) { 10331da177e4SLinus Torvalds if (buf[c->fsdata_pos + i] != p[i]) { 10341da177e4SLinus Torvalds retval = 1; 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds D1(if (retval == 1) { 10381da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_check_nand_cleanmarker(): Cleanmarker node not detected in block at %08x\n", jeb->offset); 10391da177e4SLinus Torvalds printk(KERN_WARNING "OOB at %08x was ", offset); 10401da177e4SLinus Torvalds for (i=0; i < oob_size; i++) { 10411da177e4SLinus Torvalds printk("%02x ", buf[i]); 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds printk("\n"); 10441da177e4SLinus Torvalds }) 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds offset += c->mtd->erasesize; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds return retval; 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds struct jffs2_unknown_node n; 10541da177e4SLinus Torvalds int ret; 10551da177e4SLinus Torvalds size_t retlen; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds n.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 10581da177e4SLinus Torvalds n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); 10591da177e4SLinus Torvalds n.totlen = cpu_to_je32(8); 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n); 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds if (ret) { 10641da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 10651da177e4SLinus Torvalds return ret; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds if (retlen != c->fsdata_len) { 10681da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Short write for block at %08x: %zd not %d\n", jeb->offset, retlen, c->fsdata_len)); 10691da177e4SLinus Torvalds return ret; 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds return 0; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds /* 10751da177e4SLinus Torvalds * On NAND we try to mark this block bad. If the block was erased more 10761da177e4SLinus Torvalds * than MAX_ERASE_FAILURES we mark it finaly bad. 10771da177e4SLinus Torvalds * Don't care about failures. This block remains on the erase-pending 10781da177e4SLinus Torvalds * or badblock list as long as nobody manipulates the flash with 10791da177e4SLinus Torvalds * a bootloader or something like that. 10801da177e4SLinus Torvalds */ 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset) 10831da177e4SLinus Torvalds { 10841da177e4SLinus Torvalds int ret; 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds /* if the count is < max, we try to write the counter to the 2nd page oob area */ 10871da177e4SLinus Torvalds if( ++jeb->bad_count < MAX_ERASE_FAILURES) 10881da177e4SLinus Torvalds return 0; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds if (!c->mtd->block_markbad) 10911da177e4SLinus Torvalds return 1; // What else can we do? 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset)); 10941da177e4SLinus Torvalds ret = c->mtd->block_markbad(c->mtd, bad_offset); 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds if (ret) { 10971da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 10981da177e4SLinus Torvalds return ret; 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds return 1; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds #define NAND_JFFS2_OOB16_FSDALEN 8 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static struct nand_oobinfo jffs2_oobinfo_docecc = { 11061da177e4SLinus Torvalds .useecc = MTD_NANDECC_PLACE, 11071da177e4SLinus Torvalds .eccbytes = 6, 11081da177e4SLinus Torvalds .eccpos = {0,1,2,3,4,5} 11091da177e4SLinus Torvalds }; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c) 11131da177e4SLinus Torvalds { 11141da177e4SLinus Torvalds struct nand_oobinfo *oinfo = &c->mtd->oobinfo; 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds /* Do this only, if we have an oob buffer */ 11171da177e4SLinus Torvalds if (!c->mtd->oobsize) 11181da177e4SLinus Torvalds return 0; 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds /* Cleanmarker is out-of-band, so inline size zero */ 11211da177e4SLinus Torvalds c->cleanmarker_size = 0; 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds /* Should we use autoplacement ? */ 11241da177e4SLinus Torvalds if (oinfo && oinfo->useecc == MTD_NANDECC_AUTOPLACE) { 11251da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 using autoplace on NAND\n")); 11261da177e4SLinus Torvalds /* Get the position of the free bytes */ 11271da177e4SLinus Torvalds if (!oinfo->oobfree[0][1]) { 11281da177e4SLinus Torvalds printk (KERN_WARNING "jffs2_nand_set_oobinfo(): Eeep. Autoplacement selected and no empty space in oob\n"); 11291da177e4SLinus Torvalds return -ENOSPC; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds c->fsdata_pos = oinfo->oobfree[0][0]; 11321da177e4SLinus Torvalds c->fsdata_len = oinfo->oobfree[0][1]; 11331da177e4SLinus Torvalds if (c->fsdata_len > 8) 11341da177e4SLinus Torvalds c->fsdata_len = 8; 11351da177e4SLinus Torvalds } else { 11361da177e4SLinus Torvalds /* This is just a legacy fallback and should go away soon */ 11371da177e4SLinus Torvalds switch(c->mtd->ecctype) { 11381da177e4SLinus Torvalds case MTD_ECC_RS_DiskOnChip: 11391da177e4SLinus Torvalds printk(KERN_WARNING "JFFS2 using DiskOnChip hardware ECC without autoplacement. Fix it!\n"); 11401da177e4SLinus Torvalds c->oobinfo = &jffs2_oobinfo_docecc; 11411da177e4SLinus Torvalds c->fsdata_pos = 6; 11421da177e4SLinus Torvalds c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN; 11431da177e4SLinus Torvalds c->badblock_pos = 15; 11441da177e4SLinus Torvalds break; 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds default: 11471da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n")); 11481da177e4SLinus Torvalds return -EINVAL; 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds return 0; 11521da177e4SLinus Torvalds } 11531da177e4SLinus Torvalds 11541da177e4SLinus Torvalds int jffs2_nand_flash_setup(struct jffs2_sb_info *c) 11551da177e4SLinus Torvalds { 11561da177e4SLinus Torvalds int res; 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds /* Initialise write buffer */ 11591da177e4SLinus Torvalds init_rwsem(&c->wbuf_sem); 11601da177e4SLinus Torvalds c->wbuf_pagesize = c->mtd->oobblock; 11611da177e4SLinus Torvalds c->wbuf_ofs = 0xFFFFFFFF; 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11641da177e4SLinus Torvalds if (!c->wbuf) 11651da177e4SLinus Torvalds return -ENOMEM; 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds res = jffs2_nand_set_oobinfo(c); 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds #ifdef BREAKME 11701da177e4SLinus Torvalds if (!brokenbuf) 11711da177e4SLinus Torvalds brokenbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11721da177e4SLinus Torvalds if (!brokenbuf) { 11731da177e4SLinus Torvalds kfree(c->wbuf); 11741da177e4SLinus Torvalds return -ENOMEM; 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds memset(brokenbuf, 0xdb, c->wbuf_pagesize); 11771da177e4SLinus Torvalds #endif 11781da177e4SLinus Torvalds return res; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c) 11821da177e4SLinus Torvalds { 11831da177e4SLinus Torvalds kfree(c->wbuf); 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds #ifdef CONFIG_JFFS2_FS_NOR_ECC 11871da177e4SLinus Torvalds int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) { 11881da177e4SLinus Torvalds /* Cleanmarker is actually larger on the flashes */ 11891da177e4SLinus Torvalds c->cleanmarker_size = 16; 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds /* Initialize write buffer */ 11921da177e4SLinus Torvalds init_rwsem(&c->wbuf_sem); 11931da177e4SLinus Torvalds c->wbuf_pagesize = c->mtd->eccsize; 11941da177e4SLinus Torvalds c->wbuf_ofs = 0xFFFFFFFF; 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11971da177e4SLinus Torvalds if (!c->wbuf) 11981da177e4SLinus Torvalds return -ENOMEM; 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds return 0; 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) { 12041da177e4SLinus Torvalds kfree(c->wbuf); 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds #endif 1207