11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2001-2003 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 * 102f82ce1eSAndrew Victor * $Id: nodelist.h,v 1.127 2005/02/09 09:23:53 pavlov Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #ifndef __JFFS2_NODELIST_H__ 151da177e4SLinus Torvalds #define __JFFS2_NODELIST_H__ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <linux/config.h> 181da177e4SLinus Torvalds #include <linux/fs.h> 191da177e4SLinus Torvalds #include <linux/types.h> 201da177e4SLinus Torvalds #include <linux/jffs2.h> 211da177e4SLinus Torvalds #include <linux/jffs2_fs_sb.h> 221da177e4SLinus Torvalds #include <linux/jffs2_fs_i.h> 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #ifdef __ECOS 251da177e4SLinus Torvalds #include "os-ecos.h" 261da177e4SLinus Torvalds #else 271da177e4SLinus Torvalds #include <linux/mtd/compatmac.h> /* For min/max in older kernels */ 281da177e4SLinus Torvalds #include "os-linux.h" 291da177e4SLinus Torvalds #endif 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #ifndef CONFIG_JFFS2_FS_DEBUG 321da177e4SLinus Torvalds #define CONFIG_JFFS2_FS_DEBUG 1 331da177e4SLinus Torvalds #endif 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #if CONFIG_JFFS2_FS_DEBUG > 0 361da177e4SLinus Torvalds #define D1(x) x 371da177e4SLinus Torvalds #else 381da177e4SLinus Torvalds #define D1(x) 391da177e4SLinus Torvalds #endif 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #if CONFIG_JFFS2_FS_DEBUG > 1 421da177e4SLinus Torvalds #define D2(x) x 431da177e4SLinus Torvalds #else 441da177e4SLinus Torvalds #define D2(x) 451da177e4SLinus Torvalds #endif 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #define JFFS2_NATIVE_ENDIAN 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from 501da177e4SLinus Torvalds whatever OS we're actually running on here too. */ 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds #if defined(JFFS2_NATIVE_ENDIAN) 531da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){x}) 541da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){x}) 551da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)}) 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds #define je16_to_cpu(x) ((x).v16) 581da177e4SLinus Torvalds #define je32_to_cpu(x) ((x).v32) 591da177e4SLinus Torvalds #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m)) 601da177e4SLinus Torvalds #elif defined(JFFS2_BIG_ENDIAN) 611da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)}) 621da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)}) 631da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))}) 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds #define je16_to_cpu(x) (be16_to_cpu(x.v16)) 661da177e4SLinus Torvalds #define je32_to_cpu(x) (be32_to_cpu(x.v32)) 671da177e4SLinus Torvalds #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m))) 681da177e4SLinus Torvalds #elif defined(JFFS2_LITTLE_ENDIAN) 691da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)}) 701da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)}) 711da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))}) 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds #define je16_to_cpu(x) (le16_to_cpu(x.v16)) 741da177e4SLinus Torvalds #define je32_to_cpu(x) (le32_to_cpu(x.v32)) 751da177e4SLinus Torvalds #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m))) 761da177e4SLinus Torvalds #else 771da177e4SLinus Torvalds #error wibble 781da177e4SLinus Torvalds #endif 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds /* 811da177e4SLinus Torvalds This is all we need to keep in-core for each raw node during normal 821da177e4SLinus Torvalds operation. As and when we do read_inode on a particular inode, we can 831da177e4SLinus Torvalds scan the nodes which are listed for it and build up a proper map of 841da177e4SLinus Torvalds which nodes are currently valid. JFFSv1 always used to keep that whole 851da177e4SLinus Torvalds map in core for each inode. 861da177e4SLinus Torvalds */ 871da177e4SLinus Torvalds struct jffs2_raw_node_ref 881da177e4SLinus Torvalds { 891da177e4SLinus Torvalds struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref 901da177e4SLinus Torvalds for this inode. If this is the last, it points to the inode_cache 911da177e4SLinus Torvalds for this inode instead. The inode_cache will have NULL in the first 921da177e4SLinus Torvalds word so you know when you've got there :) */ 931da177e4SLinus Torvalds struct jffs2_raw_node_ref *next_phys; 941da177e4SLinus Torvalds uint32_t flash_offset; 951da177e4SLinus Torvalds uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */ 961da177e4SLinus Torvalds }; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* flash_offset & 3 always has to be zero, because nodes are 991da177e4SLinus Torvalds always aligned at 4 bytes. So we have a couple of extra bits 1001da177e4SLinus Torvalds to play with, which indicate the node's status; see below: */ 1011da177e4SLinus Torvalds #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */ 1021da177e4SLinus Torvalds #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */ 1031da177e4SLinus Torvalds #define REF_PRISTINE 2 /* Completely clean. GC without looking */ 1041da177e4SLinus Torvalds #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */ 1051da177e4SLinus Torvalds #define ref_flags(ref) ((ref)->flash_offset & 3) 1061da177e4SLinus Torvalds #define ref_offset(ref) ((ref)->flash_offset & ~3) 1071da177e4SLinus Torvalds #define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE) 1081da177e4SLinus Torvalds #define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0) 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds /* For each inode in the filesystem, we need to keep a record of 1111da177e4SLinus Torvalds nlink, because it would be a PITA to scan the whole directory tree 1121da177e4SLinus Torvalds at read_inode() time to calculate it, and to keep sufficient information 1131da177e4SLinus Torvalds in the raw_node_ref (basically both parent and child inode number for 1141da177e4SLinus Torvalds dirent nodes) would take more space than this does. We also keep 1151da177e4SLinus Torvalds a pointer to the first physical node which is part of this inode, too. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds struct jffs2_inode_cache { 1181da177e4SLinus Torvalds struct jffs2_full_dirent *scan_dents; /* Used during scan to hold 1191da177e4SLinus Torvalds temporary lists of dirents, and later must be set to 1201da177e4SLinus Torvalds NULL to mark the end of the raw_node_ref->next_in_ino 1211da177e4SLinus Torvalds chain. */ 1221da177e4SLinus Torvalds struct jffs2_inode_cache *next; 1231da177e4SLinus Torvalds struct jffs2_raw_node_ref *nodes; 1241da177e4SLinus Torvalds uint32_t ino; 1251da177e4SLinus Torvalds int nlink; 1261da177e4SLinus Torvalds int state; 1271da177e4SLinus Torvalds }; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* Inode states for 'state' above. We need the 'GC' state to prevent 1301da177e4SLinus Torvalds someone from doing a read_inode() while we're moving a 'REF_PRISTINE' 1311da177e4SLinus Torvalds node without going through all the iget() nonsense */ 1321da177e4SLinus Torvalds #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */ 1331da177e4SLinus Torvalds #define INO_STATE_CHECKING 1 /* CRC checks in progress */ 1341da177e4SLinus Torvalds #define INO_STATE_PRESENT 2 /* In core */ 1351da177e4SLinus Torvalds #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */ 1361da177e4SLinus Torvalds #define INO_STATE_GC 4 /* GCing a 'pristine' node */ 1371da177e4SLinus Torvalds #define INO_STATE_READING 5 /* In read_inode() */ 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #define INOCACHE_HASHSIZE 128 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds /* 1421da177e4SLinus Torvalds Larger representation of a raw node, kept in-core only when the 1431da177e4SLinus Torvalds struct inode for this particular ino is instantiated. 1441da177e4SLinus Torvalds */ 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds struct jffs2_full_dnode 1471da177e4SLinus Torvalds { 1481da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 1491da177e4SLinus Torvalds uint32_t ofs; /* The offset to which the data of this node belongs */ 1501da177e4SLinus Torvalds uint32_t size; 1511da177e4SLinus Torvalds uint32_t frags; /* Number of fragments which currently refer 1521da177e4SLinus Torvalds to this node. When this reaches zero, 1531da177e4SLinus Torvalds the node is obsolete. */ 1541da177e4SLinus Torvalds }; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds /* 1571da177e4SLinus Torvalds Even larger representation of a raw node, kept in-core only while 1581da177e4SLinus Torvalds we're actually building up the original map of which nodes go where, 1591da177e4SLinus Torvalds in read_inode() 1601da177e4SLinus Torvalds */ 1611da177e4SLinus Torvalds struct jffs2_tmp_dnode_info 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *next; 1641da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 1651da177e4SLinus Torvalds uint32_t version; 1661da177e4SLinus Torvalds }; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds struct jffs2_full_dirent 1691da177e4SLinus Torvalds { 1701da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 1711da177e4SLinus Torvalds struct jffs2_full_dirent *next; 1721da177e4SLinus Torvalds uint32_t version; 1731da177e4SLinus Torvalds uint32_t ino; /* == zero for unlink */ 1741da177e4SLinus Torvalds unsigned int nhash; 1751da177e4SLinus Torvalds unsigned char type; 1761da177e4SLinus Torvalds unsigned char name[0]; 1771da177e4SLinus Torvalds }; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds /* 1801da177e4SLinus Torvalds Fragments - used to build a map of which raw node to obtain 1811da177e4SLinus Torvalds data from for each part of the ino 1821da177e4SLinus Torvalds */ 1831da177e4SLinus Torvalds struct jffs2_node_frag 1841da177e4SLinus Torvalds { 1851da177e4SLinus Torvalds struct rb_node rb; 1861da177e4SLinus Torvalds struct jffs2_full_dnode *node; /* NULL for holes */ 1871da177e4SLinus Torvalds uint32_t size; 1881da177e4SLinus Torvalds uint32_t ofs; /* The offset to which this fragment belongs */ 1891da177e4SLinus Torvalds }; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds struct jffs2_eraseblock 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds struct list_head list; 1941da177e4SLinus Torvalds int bad_count; 1951da177e4SLinus Torvalds uint32_t offset; /* of this block in the MTD */ 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds uint32_t unchecked_size; 1981da177e4SLinus Torvalds uint32_t used_size; 1991da177e4SLinus Torvalds uint32_t dirty_size; 2001da177e4SLinus Torvalds uint32_t wasted_size; 2011da177e4SLinus Torvalds uint32_t free_size; /* Note that sector_size - free_size 2021da177e4SLinus Torvalds is the address of the first free space */ 2031da177e4SLinus Torvalds struct jffs2_raw_node_ref *first_node; 2041da177e4SLinus Torvalds struct jffs2_raw_node_ref *last_node; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */ 2071da177e4SLinus Torvalds }; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds #define ACCT_SANITY_CHECK(c, jeb) do { \ 2101da177e4SLinus Torvalds struct jffs2_eraseblock *___j = jeb; \ 2111da177e4SLinus Torvalds if ((___j) && ___j->used_size + ___j->dirty_size + ___j->free_size + ___j->wasted_size + ___j->unchecked_size != c->sector_size) { \ 2121da177e4SLinus Torvalds printk(KERN_NOTICE "Eeep. Space accounting for block at 0x%08x is screwed\n", ___j->offset); \ 2131da177e4SLinus Torvalds printk(KERN_NOTICE "free 0x%08x + dirty 0x%08x + used %08x + wasted %08x + unchecked %08x != total %08x\n", \ 2141da177e4SLinus Torvalds ___j->free_size, ___j->dirty_size, ___j->used_size, ___j->wasted_size, ___j->unchecked_size, c->sector_size); \ 2151da177e4SLinus Torvalds BUG(); \ 2161da177e4SLinus Torvalds } \ 2171da177e4SLinus Torvalds if (c->used_size + c->dirty_size + c->free_size + c->erasing_size + c->bad_size + c->wasted_size + c->unchecked_size != c->flash_size) { \ 2181da177e4SLinus Torvalds printk(KERN_NOTICE "Eeep. Space accounting superblock info is screwed\n"); \ 2191da177e4SLinus Torvalds printk(KERN_NOTICE "free 0x%08x + dirty 0x%08x + used %08x + erasing %08x + bad %08x + wasted %08x + unchecked %08x != total %08x\n", \ 2201da177e4SLinus Torvalds c->free_size, c->dirty_size, c->used_size, c->erasing_size, c->bad_size, c->wasted_size, c->unchecked_size, c->flash_size); \ 2211da177e4SLinus Torvalds BUG(); \ 2221da177e4SLinus Torvalds } \ 2231da177e4SLinus Torvalds } while(0) 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static inline void paranoia_failed_dump(struct jffs2_eraseblock *jeb) 2261da177e4SLinus Torvalds { 2271da177e4SLinus Torvalds struct jffs2_raw_node_ref *ref; 2281da177e4SLinus Torvalds int i=0; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds printk(KERN_NOTICE); 2311da177e4SLinus Torvalds for (ref = jeb->first_node; ref; ref = ref->next_phys) { 2321da177e4SLinus Torvalds printk("%08x->", ref_offset(ref)); 2331da177e4SLinus Torvalds if (++i == 8) { 2341da177e4SLinus Torvalds i = 0; 2351da177e4SLinus Torvalds printk("\n" KERN_NOTICE); 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds printk("\n"); 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds #define ACCT_PARANOIA_CHECK(jeb) do { \ 2431da177e4SLinus Torvalds uint32_t my_used_size = 0; \ 2441da177e4SLinus Torvalds uint32_t my_unchecked_size = 0; \ 2451da177e4SLinus Torvalds struct jffs2_raw_node_ref *ref2 = jeb->first_node; \ 2461da177e4SLinus Torvalds while (ref2) { \ 2471da177e4SLinus Torvalds if (unlikely(ref2->flash_offset < jeb->offset || \ 2481da177e4SLinus Torvalds ref2->flash_offset > jeb->offset + c->sector_size)) { \ 2491da177e4SLinus Torvalds printk(KERN_NOTICE "Node %08x shouldn't be in block at %08x!\n", \ 2501da177e4SLinus Torvalds ref_offset(ref2), jeb->offset); \ 2511da177e4SLinus Torvalds paranoia_failed_dump(jeb); \ 2521da177e4SLinus Torvalds BUG(); \ 2531da177e4SLinus Torvalds } \ 2541da177e4SLinus Torvalds if (ref_flags(ref2) == REF_UNCHECKED) \ 2551da177e4SLinus Torvalds my_unchecked_size += ref_totlen(c, jeb, ref2); \ 2561da177e4SLinus Torvalds else if (!ref_obsolete(ref2)) \ 2571da177e4SLinus Torvalds my_used_size += ref_totlen(c, jeb, ref2); \ 2581da177e4SLinus Torvalds if (unlikely((!ref2->next_phys) != (ref2 == jeb->last_node))) { \ 2591da177e4SLinus Torvalds if (!ref2->next_phys) \ 2601da177e4SLinus Torvalds printk("ref for node at %p (phys %08x) has next_phys->%p (----), last_node->%p (phys %08x)\n", \ 2611da177e4SLinus Torvalds ref2, ref_offset(ref2), ref2->next_phys, \ 2621da177e4SLinus Torvalds jeb->last_node, ref_offset(jeb->last_node)); \ 2631da177e4SLinus Torvalds else \ 2641da177e4SLinus Torvalds printk("ref for node at %p (phys %08x) has next_phys->%p (%08x), last_node->%p (phys %08x)\n", \ 2651da177e4SLinus Torvalds ref2, ref_offset(ref2), ref2->next_phys, ref_offset(ref2->next_phys), \ 2661da177e4SLinus Torvalds jeb->last_node, ref_offset(jeb->last_node)); \ 2671da177e4SLinus Torvalds paranoia_failed_dump(jeb); \ 2681da177e4SLinus Torvalds BUG(); \ 2691da177e4SLinus Torvalds } \ 2701da177e4SLinus Torvalds ref2 = ref2->next_phys; \ 2711da177e4SLinus Torvalds } \ 2721da177e4SLinus Torvalds if (my_used_size != jeb->used_size) { \ 2731da177e4SLinus Torvalds printk(KERN_NOTICE "Calculated used size %08x != stored used size %08x\n", my_used_size, jeb->used_size); \ 2741da177e4SLinus Torvalds BUG(); \ 2751da177e4SLinus Torvalds } \ 2761da177e4SLinus Torvalds if (my_unchecked_size != jeb->unchecked_size) { \ 2771da177e4SLinus Torvalds printk(KERN_NOTICE "Calculated unchecked size %08x != stored unchecked size %08x\n", my_unchecked_size, jeb->unchecked_size); \ 2781da177e4SLinus Torvalds BUG(); \ 2791da177e4SLinus Torvalds } \ 2801da177e4SLinus Torvalds } while(0) 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds /* Calculate totlen from surrounding nodes or eraseblock */ 2831da177e4SLinus Torvalds static inline uint32_t __ref_totlen(struct jffs2_sb_info *c, 2841da177e4SLinus Torvalds struct jffs2_eraseblock *jeb, 2851da177e4SLinus Torvalds struct jffs2_raw_node_ref *ref) 2861da177e4SLinus Torvalds { 2871da177e4SLinus Torvalds uint32_t ref_end; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds if (ref->next_phys) 2901da177e4SLinus Torvalds ref_end = ref_offset(ref->next_phys); 2911da177e4SLinus Torvalds else { 2921da177e4SLinus Torvalds if (!jeb) 2931da177e4SLinus Torvalds jeb = &c->blocks[ref->flash_offset / c->sector_size]; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /* Last node in block. Use free_space */ 2961da177e4SLinus Torvalds BUG_ON(ref != jeb->last_node); 2971da177e4SLinus Torvalds ref_end = jeb->offset + c->sector_size - jeb->free_size; 2981da177e4SLinus Torvalds } 2991da177e4SLinus Torvalds return ref_end - ref_offset(ref); 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds static inline uint32_t ref_totlen(struct jffs2_sb_info *c, 3031da177e4SLinus Torvalds struct jffs2_eraseblock *jeb, 3041da177e4SLinus Torvalds struct jffs2_raw_node_ref *ref) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds uint32_t ret; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds D1(if (jeb && jeb != &c->blocks[ref->flash_offset / c->sector_size]) { 3091da177e4SLinus Torvalds printk(KERN_CRIT "ref_totlen called with wrong block -- at 0x%08x instead of 0x%08x; ref 0x%08x\n", 3101da177e4SLinus Torvalds jeb->offset, c->blocks[ref->flash_offset / c->sector_size].offset, ref_offset(ref)); 3111da177e4SLinus Torvalds BUG(); 3121da177e4SLinus Torvalds }) 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds #if 1 3151da177e4SLinus Torvalds ret = ref->__totlen; 3161da177e4SLinus Torvalds #else 3171da177e4SLinus Torvalds /* This doesn't actually work yet */ 3181da177e4SLinus Torvalds ret = __ref_totlen(c, jeb, ref); 3191da177e4SLinus Torvalds if (ret != ref->__totlen) { 3201da177e4SLinus Torvalds printk(KERN_CRIT "Totlen for ref at %p (0x%08x-0x%08x) miscalculated as 0x%x instead of %x\n", 3211da177e4SLinus Torvalds ref, ref_offset(ref), ref_offset(ref)+ref->__totlen, 3221da177e4SLinus Torvalds ret, ref->__totlen); 3231da177e4SLinus Torvalds if (!jeb) 3241da177e4SLinus Torvalds jeb = &c->blocks[ref->flash_offset / c->sector_size]; 3251da177e4SLinus Torvalds paranoia_failed_dump(jeb); 3261da177e4SLinus Torvalds BUG(); 3271da177e4SLinus Torvalds } 3281da177e4SLinus Torvalds #endif 3291da177e4SLinus Torvalds return ret; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds #define ALLOC_NORMAL 0 /* Normal allocation */ 3341da177e4SLinus Torvalds #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */ 3351da177e4SLinus Torvalds #define ALLOC_GC 2 /* Space requested for GC. Give it or die */ 3361da177e4SLinus Torvalds #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */ 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds /* How much dirty space before it goes on the very_dirty_list */ 3391da177e4SLinus Torvalds #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2)) 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* check if dirty space is more than 255 Byte */ 3421da177e4SLinus Torvalds #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN) 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds #define PAD(x) (((x)+3)&~3) 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds while(raw->next_in_ino) { 3491da177e4SLinus Torvalds raw = raw->next_in_ino; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds return ((struct jffs2_inode_cache *)raw); 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds static inline struct jffs2_node_frag *frag_first(struct rb_root *root) 3561da177e4SLinus Torvalds { 3571da177e4SLinus Torvalds struct rb_node *node = root->rb_node; 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds if (!node) 3601da177e4SLinus Torvalds return NULL; 3611da177e4SLinus Torvalds while(node->rb_left) 3621da177e4SLinus Torvalds node = node->rb_left; 3631da177e4SLinus Torvalds return rb_entry(node, struct jffs2_node_frag, rb); 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds #define rb_parent(rb) ((rb)->rb_parent) 3661da177e4SLinus Torvalds #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb) 3671da177e4SLinus Torvalds #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb) 3681da177e4SLinus Torvalds #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb) 3691da177e4SLinus Torvalds #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb) 3701da177e4SLinus Torvalds #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb) 3711da177e4SLinus Torvalds #define frag_erase(frag, list) rb_erase(&frag->rb, list); 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds /* nodelist.c */ 3741da177e4SLinus Torvalds D2(void jffs2_print_frag_list(struct jffs2_inode_info *f)); 3751da177e4SLinus Torvalds void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list); 3761da177e4SLinus Torvalds int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3771da177e4SLinus Torvalds struct jffs2_tmp_dnode_info **tnp, struct jffs2_full_dirent **fdp, 3781da177e4SLinus Torvalds uint32_t *highest_version, uint32_t *latest_mctime, 3791da177e4SLinus Torvalds uint32_t *mctime_ver); 3801da177e4SLinus Torvalds void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state); 3811da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino); 3821da177e4SLinus Torvalds void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new); 3831da177e4SLinus Torvalds void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old); 3841da177e4SLinus Torvalds void jffs2_free_ino_caches(struct jffs2_sb_info *c); 3851da177e4SLinus Torvalds void jffs2_free_raw_node_refs(struct jffs2_sb_info *c); 3861da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset); 3871da177e4SLinus Torvalds void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete); 3881da177e4SLinus Torvalds void jffs2_fragtree_insert(struct jffs2_node_frag *newfrag, struct jffs2_node_frag *base); 3891da177e4SLinus Torvalds struct rb_node *rb_next(struct rb_node *); 3901da177e4SLinus Torvalds struct rb_node *rb_prev(struct rb_node *); 3911da177e4SLinus Torvalds void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_root *root); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds /* nodemgmt.c */ 3941da177e4SLinus Torvalds int jffs2_thread_should_wake(struct jffs2_sb_info *c); 3951da177e4SLinus Torvalds int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len, int prio); 3961da177e4SLinus Torvalds int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len); 3971da177e4SLinus Torvalds int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new); 3981da177e4SLinus Torvalds void jffs2_complete_reservation(struct jffs2_sb_info *c); 3991da177e4SLinus Torvalds void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw); 4001da177e4SLinus Torvalds void jffs2_dump_block_lists(struct jffs2_sb_info *c); 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds /* write.c */ 4031da177e4SLinus Torvalds int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri); 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const unsigned char *data, uint32_t datalen, uint32_t flash_ofs, int alloc_mode); 4061da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_dirent *rd, const unsigned char *name, uint32_t namelen, uint32_t flash_ofs, int alloc_mode); 4071da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4081da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 4091da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen); 4101da177e4SLinus Torvalds int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen); 4111da177e4SLinus Torvalds int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, int namelen, struct jffs2_inode_info *dead_f); 4121da177e4SLinus Torvalds 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); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* readinode.c */ 4161da177e4SLinus Torvalds void jffs2_truncate_fraglist (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size); 4171da177e4SLinus Torvalds int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn); 4181da177e4SLinus Torvalds int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4191da177e4SLinus Torvalds uint32_t ino, struct jffs2_raw_inode *latest_node); 4201da177e4SLinus Torvalds int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 4211da177e4SLinus Torvalds void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /* malloc.c */ 4241da177e4SLinus Torvalds int jffs2_create_slab_caches(void); 4251da177e4SLinus Torvalds void jffs2_destroy_slab_caches(void); 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize); 4281da177e4SLinus Torvalds void jffs2_free_full_dirent(struct jffs2_full_dirent *); 4291da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_alloc_full_dnode(void); 4301da177e4SLinus Torvalds void jffs2_free_full_dnode(struct jffs2_full_dnode *); 4311da177e4SLinus Torvalds struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void); 4321da177e4SLinus Torvalds void jffs2_free_raw_dirent(struct jffs2_raw_dirent *); 4331da177e4SLinus Torvalds struct jffs2_raw_inode *jffs2_alloc_raw_inode(void); 4341da177e4SLinus Torvalds void jffs2_free_raw_inode(struct jffs2_raw_inode *); 4351da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void); 4361da177e4SLinus Torvalds void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *); 4371da177e4SLinus Torvalds struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void); 4381da177e4SLinus Torvalds void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *); 4391da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_alloc_node_frag(void); 4401da177e4SLinus Torvalds void jffs2_free_node_frag(struct jffs2_node_frag *); 4411da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_alloc_inode_cache(void); 4421da177e4SLinus Torvalds void jffs2_free_inode_cache(struct jffs2_inode_cache *); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds /* gc.c */ 4451da177e4SLinus Torvalds int jffs2_garbage_collect_pass(struct jffs2_sb_info *c); 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds /* read.c */ 4481da177e4SLinus Torvalds int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4491da177e4SLinus Torvalds struct jffs2_full_dnode *fd, unsigned char *buf, 4501da177e4SLinus Torvalds int ofs, int len); 4511da177e4SLinus Torvalds int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4521da177e4SLinus Torvalds unsigned char *buf, uint32_t offset, uint32_t len); 4531da177e4SLinus Torvalds char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds /* scan.c */ 4561da177e4SLinus Torvalds int jffs2_scan_medium(struct jffs2_sb_info *c); 4571da177e4SLinus Torvalds void jffs2_rotate_lists(struct jffs2_sb_info *c); 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds /* build.c */ 4601da177e4SLinus Torvalds int jffs2_do_mount_fs(struct jffs2_sb_info *c); 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds /* erase.c */ 4631da177e4SLinus Torvalds void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count); 4641da177e4SLinus Torvalds 4652f82ce1eSAndrew Victor #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 4661da177e4SLinus Torvalds /* wbuf.c */ 4671da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 4681da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 4691da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4701da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4711da177e4SLinus Torvalds #endif 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds #endif /* __JFFS2_NODELIST_H__ */ 474