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 * 10e631ddbaSFerenc Havasi * $Id: nodelist.h,v 1.140 2005/09/07 08:34:54 havasi 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/fs.h> 181da177e4SLinus Torvalds #include <linux/types.h> 191da177e4SLinus Torvalds #include <linux/jffs2.h> 20cbb9a561SDavid Woodhouse #include "jffs2_fs_sb.h" 21cbb9a561SDavid Woodhouse #include "jffs2_fs_i.h" 22aa98d7cfSKaiGai Kohei #include "xattr.h" 23aa98d7cfSKaiGai Kohei #include "acl.h" 24e631ddbaSFerenc Havasi #include "summary.h" 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds #ifdef __ECOS 271da177e4SLinus Torvalds #include "os-ecos.h" 281da177e4SLinus Torvalds #else 29730554d9SArtem B. Bityutskiy #include <linux/mtd/compatmac.h> /* For compatibility with older kernels */ 301da177e4SLinus Torvalds #include "os-linux.h" 311da177e4SLinus Torvalds #endif 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #define JFFS2_NATIVE_ENDIAN 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from 361da177e4SLinus Torvalds whatever OS we're actually running on here too. */ 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #if defined(JFFS2_NATIVE_ENDIAN) 391da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){x}) 401da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){x}) 411da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)}) 421da177e4SLinus Torvalds 43566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){x}) 44566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){x}) 45566865a2SDavid Woodhouse 461da177e4SLinus Torvalds #define je16_to_cpu(x) ((x).v16) 471da177e4SLinus Torvalds #define je32_to_cpu(x) ((x).v32) 481da177e4SLinus Torvalds #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m)) 491da177e4SLinus Torvalds #elif defined(JFFS2_BIG_ENDIAN) 501da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)}) 511da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)}) 521da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))}) 531da177e4SLinus Torvalds 54566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)}) 55566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)}) 56566865a2SDavid Woodhouse 571da177e4SLinus Torvalds #define je16_to_cpu(x) (be16_to_cpu(x.v16)) 581da177e4SLinus Torvalds #define je32_to_cpu(x) (be32_to_cpu(x.v32)) 591da177e4SLinus Torvalds #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m))) 601da177e4SLinus Torvalds #elif defined(JFFS2_LITTLE_ENDIAN) 611da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)}) 621da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)}) 631da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))}) 641da177e4SLinus Torvalds 65566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)}) 66566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)}) 67566865a2SDavid Woodhouse 681da177e4SLinus Torvalds #define je16_to_cpu(x) (le16_to_cpu(x.v16)) 691da177e4SLinus Torvalds #define je32_to_cpu(x) (le32_to_cpu(x.v32)) 701da177e4SLinus Torvalds #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m))) 711da177e4SLinus Torvalds #else 721da177e4SLinus Torvalds #error wibble 731da177e4SLinus Torvalds #endif 741da177e4SLinus Torvalds 751e0da3cbSArtem B. Bityutskiy /* The minimal node header size */ 761e0da3cbSArtem B. Bityutskiy #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent) 771e0da3cbSArtem B. Bityutskiy 781da177e4SLinus Torvalds /* 791da177e4SLinus Torvalds This is all we need to keep in-core for each raw node during normal 801da177e4SLinus Torvalds operation. As and when we do read_inode on a particular inode, we can 811da177e4SLinus Torvalds scan the nodes which are listed for it and build up a proper map of 821da177e4SLinus Torvalds which nodes are currently valid. JFFSv1 always used to keep that whole 831da177e4SLinus Torvalds map in core for each inode. 841da177e4SLinus Torvalds */ 851da177e4SLinus Torvalds struct jffs2_raw_node_ref 861da177e4SLinus Torvalds { 871da177e4SLinus Torvalds struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref 88987d47b7SDavid Woodhouse for this object. If this _is_ the last, it points to the inode_cache, 89987d47b7SDavid Woodhouse xattr_ref or xattr_datum instead. The common part of those structures 90987d47b7SDavid Woodhouse has NULL in the first word. See jffs2_raw_ref_to_ic() below */ 911da177e4SLinus Torvalds uint32_t flash_offset; 92ca89a517SDavid Woodhouse #define TEST_TOTLEN 93ca89a517SDavid Woodhouse #ifdef TEST_TOTLEN 941da177e4SLinus Torvalds uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */ 95ca89a517SDavid Woodhouse #endif 961da177e4SLinus Torvalds }; 971da177e4SLinus Torvalds 989bfeb691SDavid Woodhouse #define REF_LINK_NODE ((int32_t)-1) 999bfeb691SDavid Woodhouse #define REF_EMPTY_NODE ((int32_t)-2) 1009bfeb691SDavid Woodhouse 1019bfeb691SDavid Woodhouse /* Use blocks of about 256 bytes */ 1029bfeb691SDavid Woodhouse #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1) 1039bfeb691SDavid Woodhouse 1049bfeb691SDavid Woodhouse static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref) 1059bfeb691SDavid Woodhouse { 1069bfeb691SDavid Woodhouse ref++; 1079bfeb691SDavid Woodhouse 1089bfeb691SDavid Woodhouse /* Link to another block of refs */ 1099bfeb691SDavid Woodhouse if (ref->flash_offset == REF_LINK_NODE) { 1109bfeb691SDavid Woodhouse ref = ref->next_in_ino; 1119bfeb691SDavid Woodhouse if (!ref) 1129bfeb691SDavid Woodhouse return ref; 1139bfeb691SDavid Woodhouse } 1149bfeb691SDavid Woodhouse 1159bfeb691SDavid Woodhouse /* End of chain */ 1169bfeb691SDavid Woodhouse if (ref->flash_offset == REF_EMPTY_NODE) 1179bfeb691SDavid Woodhouse return NULL; 1189bfeb691SDavid Woodhouse 1199bfeb691SDavid Woodhouse return ref; 1209bfeb691SDavid Woodhouse } 12199988f7bSDavid Woodhouse 122987d47b7SDavid Woodhouse static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw) 123987d47b7SDavid Woodhouse { 12499988f7bSDavid Woodhouse while(raw->next_in_ino) 125987d47b7SDavid Woodhouse raw = raw->next_in_ino; 126987d47b7SDavid Woodhouse 127987d47b7SDavid Woodhouse /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and 128987d47b7SDavid Woodhouse not actually a jffs2_inode_cache. Check ->class */ 129987d47b7SDavid Woodhouse return ((struct jffs2_inode_cache *)raw); 130987d47b7SDavid Woodhouse } 131987d47b7SDavid Woodhouse 1321da177e4SLinus Torvalds /* flash_offset & 3 always has to be zero, because nodes are 1331da177e4SLinus Torvalds always aligned at 4 bytes. So we have a couple of extra bits 1341da177e4SLinus Torvalds to play with, which indicate the node's status; see below: */ 1351da177e4SLinus Torvalds #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */ 1361da177e4SLinus Torvalds #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */ 1371da177e4SLinus Torvalds #define REF_PRISTINE 2 /* Completely clean. GC without looking */ 1381da177e4SLinus Torvalds #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */ 1391da177e4SLinus Torvalds #define ref_flags(ref) ((ref)->flash_offset & 3) 1401da177e4SLinus Torvalds #define ref_offset(ref) ((ref)->flash_offset & ~3) 1411da177e4SLinus Torvalds #define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE) 1421da177e4SLinus Torvalds #define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0) 1431da177e4SLinus Torvalds 1446171586aSDavid Woodhouse /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates 1456171586aSDavid Woodhouse it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get 1466171586aSDavid Woodhouse copied. If you need to do anything different to GC inode-less nodes, then 1476171586aSDavid Woodhouse you need to modify gc.c accordingly. */ 1486171586aSDavid Woodhouse 1491da177e4SLinus Torvalds /* For each inode in the filesystem, we need to keep a record of 1501da177e4SLinus Torvalds nlink, because it would be a PITA to scan the whole directory tree 1511da177e4SLinus Torvalds at read_inode() time to calculate it, and to keep sufficient information 1521da177e4SLinus Torvalds in the raw_node_ref (basically both parent and child inode number for 1531da177e4SLinus Torvalds dirent nodes) would take more space than this does. We also keep 1541da177e4SLinus Torvalds a pointer to the first physical node which is part of this inode, too. 1551da177e4SLinus Torvalds */ 1561da177e4SLinus Torvalds struct jffs2_inode_cache { 157987d47b7SDavid Woodhouse /* First part of structure is shared with other objects which 158987d47b7SDavid Woodhouse can terminate the raw node refs' next_in_ino list -- which 159987d47b7SDavid Woodhouse currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */ 160987d47b7SDavid Woodhouse 1611da177e4SLinus Torvalds struct jffs2_full_dirent *scan_dents; /* Used during scan to hold 1621da177e4SLinus Torvalds temporary lists of dirents, and later must be set to 1631da177e4SLinus Torvalds NULL to mark the end of the raw_node_ref->next_in_ino 1641da177e4SLinus Torvalds chain. */ 1651da177e4SLinus Torvalds struct jffs2_raw_node_ref *nodes; 166987d47b7SDavid Woodhouse uint8_t class; /* It's used for identification */ 167987d47b7SDavid Woodhouse 168987d47b7SDavid Woodhouse /* end of shared structure */ 169987d47b7SDavid Woodhouse 170987d47b7SDavid Woodhouse uint8_t flags; 171987d47b7SDavid Woodhouse uint16_t state; 1721da177e4SLinus Torvalds uint32_t ino; 173987d47b7SDavid Woodhouse struct jffs2_inode_cache *next; 174aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 1758f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *xref; 176aa98d7cfSKaiGai Kohei #endif 177987d47b7SDavid Woodhouse int nlink; 1781da177e4SLinus Torvalds }; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds /* Inode states for 'state' above. We need the 'GC' state to prevent 1811da177e4SLinus Torvalds someone from doing a read_inode() while we're moving a 'REF_PRISTINE' 1821da177e4SLinus Torvalds node without going through all the iget() nonsense */ 1831da177e4SLinus Torvalds #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */ 1841da177e4SLinus Torvalds #define INO_STATE_CHECKING 1 /* CRC checks in progress */ 1851da177e4SLinus Torvalds #define INO_STATE_PRESENT 2 /* In core */ 1861da177e4SLinus Torvalds #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */ 1871da177e4SLinus Torvalds #define INO_STATE_GC 4 /* GCing a 'pristine' node */ 1881da177e4SLinus Torvalds #define INO_STATE_READING 5 /* In read_inode() */ 18967e345d1SDavid Woodhouse #define INO_STATE_CLEARING 6 /* In clear_inode() */ 1901da177e4SLinus Torvalds 191aa98d7cfSKaiGai Kohei #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ 192aa98d7cfSKaiGai Kohei 193aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_INODE_CACHE 0 194aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_XATTR_DATUM 1 195aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_XATTR_REF 2 196aa98d7cfSKaiGai Kohei 1971da177e4SLinus Torvalds #define INOCACHE_HASHSIZE 128 1981da177e4SLinus Torvalds 1999fe4854cSDavid Woodhouse #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size) 2009fe4854cSDavid Woodhouse 2011da177e4SLinus Torvalds /* 2021da177e4SLinus Torvalds Larger representation of a raw node, kept in-core only when the 2031da177e4SLinus Torvalds struct inode for this particular ino is instantiated. 2041da177e4SLinus Torvalds */ 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds struct jffs2_full_dnode 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2091da177e4SLinus Torvalds uint32_t ofs; /* The offset to which the data of this node belongs */ 2101da177e4SLinus Torvalds uint32_t size; 2111da177e4SLinus Torvalds uint32_t frags; /* Number of fragments which currently refer 2121da177e4SLinus Torvalds to this node. When this reaches zero, 2131da177e4SLinus Torvalds the node is obsolete. */ 2141da177e4SLinus Torvalds }; 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds /* 2171da177e4SLinus Torvalds Even larger representation of a raw node, kept in-core only while 2181da177e4SLinus Torvalds we're actually building up the original map of which nodes go where, 2191da177e4SLinus Torvalds in read_inode() 2201da177e4SLinus Torvalds */ 2211da177e4SLinus Torvalds struct jffs2_tmp_dnode_info 2221da177e4SLinus Torvalds { 2239dee7503SDavid Woodhouse struct rb_node rb; 2241da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 2251da177e4SLinus Torvalds uint32_t version; 2261e0da3cbSArtem B. Bityutskiy uint32_t data_crc; 2271e0da3cbSArtem B. Bityutskiy uint32_t partial_crc; 228df8e96f3SDavid Woodhouse uint16_t csize; 229df8e96f3SDavid Woodhouse uint16_t overlapped; 230df8e96f3SDavid Woodhouse }; 231df8e96f3SDavid Woodhouse 232df8e96f3SDavid Woodhouse /* Temporary data structure used during readinode. */ 233df8e96f3SDavid Woodhouse struct jffs2_readinode_info 234df8e96f3SDavid Woodhouse { 235df8e96f3SDavid Woodhouse struct rb_root tn_root; 236df8e96f3SDavid Woodhouse struct jffs2_tmp_dnode_info *mdata_tn; 237df8e96f3SDavid Woodhouse uint32_t highest_version; 238df8e96f3SDavid Woodhouse uint32_t latest_mctime; 239df8e96f3SDavid Woodhouse uint32_t mctime_ver; 240df8e96f3SDavid Woodhouse struct jffs2_full_dirent *fds; 241df8e96f3SDavid Woodhouse struct jffs2_raw_node_ref *latest_ref; 2421da177e4SLinus Torvalds }; 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds struct jffs2_full_dirent 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2471da177e4SLinus Torvalds struct jffs2_full_dirent *next; 2481da177e4SLinus Torvalds uint32_t version; 2491da177e4SLinus Torvalds uint32_t ino; /* == zero for unlink */ 2501da177e4SLinus Torvalds unsigned int nhash; 2511da177e4SLinus Torvalds unsigned char type; 2521da177e4SLinus Torvalds unsigned char name[0]; 2531da177e4SLinus Torvalds }; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds /* 2561da177e4SLinus Torvalds Fragments - used to build a map of which raw node to obtain 2571da177e4SLinus Torvalds data from for each part of the ino 2581da177e4SLinus Torvalds */ 2591da177e4SLinus Torvalds struct jffs2_node_frag 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds struct rb_node rb; 2621da177e4SLinus Torvalds struct jffs2_full_dnode *node; /* NULL for holes */ 2631da177e4SLinus Torvalds uint32_t size; 2641da177e4SLinus Torvalds uint32_t ofs; /* The offset to which this fragment belongs */ 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds struct jffs2_eraseblock 2681da177e4SLinus Torvalds { 2691da177e4SLinus Torvalds struct list_head list; 2701da177e4SLinus Torvalds int bad_count; 2711da177e4SLinus Torvalds uint32_t offset; /* of this block in the MTD */ 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds uint32_t unchecked_size; 2741da177e4SLinus Torvalds uint32_t used_size; 2751da177e4SLinus Torvalds uint32_t dirty_size; 2761da177e4SLinus Torvalds uint32_t wasted_size; 2771da177e4SLinus Torvalds uint32_t free_size; /* Note that sector_size - free_size 2781da177e4SLinus Torvalds is the address of the first free space */ 2799bfeb691SDavid Woodhouse uint32_t allocated_refs; 2801da177e4SLinus Torvalds struct jffs2_raw_node_ref *first_node; 2811da177e4SLinus Torvalds struct jffs2_raw_node_ref *last_node; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */ 2841da177e4SLinus Torvalds }; 2851da177e4SLinus Torvalds 2864ce1f562SFerenc Havasi static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c) 2874ce1f562SFerenc Havasi { 2884ce1f562SFerenc Havasi return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024); 2894ce1f562SFerenc Havasi } 2904ce1f562SFerenc Havasi 291ca89a517SDavid Woodhouse #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c)) 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds #define ALLOC_NORMAL 0 /* Normal allocation */ 2941da177e4SLinus Torvalds #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */ 2951da177e4SLinus Torvalds #define ALLOC_GC 2 /* Space requested for GC. Give it or die */ 2961da177e4SLinus Torvalds #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */ 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds /* How much dirty space before it goes on the very_dirty_list */ 2991da177e4SLinus Torvalds #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2)) 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds /* check if dirty space is more than 255 Byte */ 3021da177e4SLinus Torvalds #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN) 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds #define PAD(x) (((x)+3)&~3) 3051da177e4SLinus Torvalds 306aef9ab47SDavid Woodhouse static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev) 307aef9ab47SDavid Woodhouse { 308aef9ab47SDavid Woodhouse if (old_valid_dev(rdev)) { 309aef9ab47SDavid Woodhouse jdev->old = cpu_to_je16(old_encode_dev(rdev)); 310aef9ab47SDavid Woodhouse return sizeof(jdev->old); 311aef9ab47SDavid Woodhouse } else { 312aef9ab47SDavid Woodhouse jdev->new = cpu_to_je32(new_encode_dev(rdev)); 313aef9ab47SDavid Woodhouse return sizeof(jdev->new); 314aef9ab47SDavid Woodhouse } 315aef9ab47SDavid Woodhouse } 316aef9ab47SDavid Woodhouse 3171da177e4SLinus Torvalds static inline struct jffs2_node_frag *frag_first(struct rb_root *root) 3181da177e4SLinus Torvalds { 319ea7415ccSAkinobu Mita struct rb_node *node = rb_first(root); 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds if (!node) 3221da177e4SLinus Torvalds return NULL; 323ea7415ccSAkinobu Mita 3241da177e4SLinus Torvalds return rb_entry(node, struct jffs2_node_frag, rb); 3251da177e4SLinus Torvalds } 3268557fd51SArtem B. Bityuckiy 3278557fd51SArtem B. Bityuckiy static inline struct jffs2_node_frag *frag_last(struct rb_root *root) 3288557fd51SArtem B. Bityuckiy { 329ea7415ccSAkinobu Mita struct rb_node *node = rb_last(root); 3308557fd51SArtem B. Bityuckiy 3318557fd51SArtem B. Bityuckiy if (!node) 3328557fd51SArtem B. Bityuckiy return NULL; 333ea7415ccSAkinobu Mita 3348557fd51SArtem B. Bityuckiy return rb_entry(node, struct jffs2_node_frag, rb); 3358557fd51SArtem B. Bityuckiy } 3368557fd51SArtem B. Bityuckiy 3371da177e4SLinus Torvalds #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb) 3381da177e4SLinus Torvalds #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb) 3391da177e4SLinus Torvalds #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb) 3401da177e4SLinus Torvalds #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb) 3411da177e4SLinus Torvalds #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb) 3421da177e4SLinus Torvalds #define frag_erase(frag, list) rb_erase(&frag->rb, list); 3431da177e4SLinus Torvalds 344df8e96f3SDavid Woodhouse #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 345df8e96f3SDavid Woodhouse #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 346df8e96f3SDavid Woodhouse #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 347df8e96f3SDavid Woodhouse #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb) 348df8e96f3SDavid Woodhouse #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb) 349df8e96f3SDavid Woodhouse #define tn_erase(tn, list) rb_erase(&tn->rb, list); 350df8e96f3SDavid Woodhouse #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb) 351df8e96f3SDavid Woodhouse #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb) 352df8e96f3SDavid Woodhouse 3531da177e4SLinus Torvalds /* nodelist.c */ 3541da177e4SLinus Torvalds void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list); 3551da177e4SLinus Torvalds void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state); 3561da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino); 3571da177e4SLinus Torvalds void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new); 3581da177e4SLinus Torvalds void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old); 3591da177e4SLinus Torvalds void jffs2_free_ino_caches(struct jffs2_sb_info *c); 3601da177e4SLinus Torvalds void jffs2_free_raw_node_refs(struct jffs2_sb_info *c); 3611da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset); 3621da177e4SLinus Torvalds void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete); 3631da177e4SLinus Torvalds struct rb_node *rb_next(struct rb_node *); 3641da177e4SLinus Torvalds struct rb_node *rb_prev(struct rb_node *); 3651da177e4SLinus Torvalds void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_root *root); 366f97117d1SArtem B. Bityutskiy int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn); 3671e900979SArtem B. Bityutskiy void jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size); 3682f785402SDavid Woodhouse struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c, 3692f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3702f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 371fcb75787SDavid Woodhouse struct jffs2_inode_cache *ic); 372ca89a517SDavid Woodhouse extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, 373ca89a517SDavid Woodhouse struct jffs2_eraseblock *jeb, 374ca89a517SDavid Woodhouse struct jffs2_raw_node_ref *ref); 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds /* nodemgmt.c */ 3771da177e4SLinus Torvalds int jffs2_thread_should_wake(struct jffs2_sb_info *c); 3789fe4854cSDavid Woodhouse int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, 379e631ddbaSFerenc Havasi uint32_t *len, int prio, uint32_t sumsize); 3809fe4854cSDavid Woodhouse int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, 381e631ddbaSFerenc Havasi uint32_t *len, uint32_t sumsize); 3822f785402SDavid Woodhouse struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, 3832f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 384fcb75787SDavid Woodhouse struct jffs2_inode_cache *ic); 3851da177e4SLinus Torvalds void jffs2_complete_reservation(struct jffs2_sb_info *c); 3861da177e4SLinus Torvalds void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw); 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds /* write.c */ 3891da177e4SLinus Torvalds int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri); 3901da177e4SLinus Torvalds 3919fe4854cSDavid Woodhouse struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3929fe4854cSDavid Woodhouse struct jffs2_raw_inode *ri, const unsigned char *data, 3939fe4854cSDavid Woodhouse uint32_t datalen, int alloc_mode); 3949fe4854cSDavid Woodhouse struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3959fe4854cSDavid Woodhouse struct jffs2_raw_dirent *rd, const unsigned char *name, 3969fe4854cSDavid Woodhouse uint32_t namelen, int alloc_mode); 3971da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3981da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 3991da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen); 4009fe4854cSDavid Woodhouse int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, 4019fe4854cSDavid Woodhouse struct jffs2_raw_inode *ri, const char *name, int namelen); 4029fe4854cSDavid Woodhouse int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, 4039fe4854cSDavid Woodhouse int namelen, struct jffs2_inode_info *dead_f, uint32_t time); 4049fe4854cSDavid Woodhouse int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, 4059fe4854cSDavid Woodhouse uint8_t type, const char *name, int namelen, uint32_t time); 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds /* readinode.c */ 4091da177e4SLinus Torvalds int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4101da177e4SLinus Torvalds uint32_t ino, struct jffs2_raw_inode *latest_node); 4111da177e4SLinus Torvalds int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 4121da177e4SLinus Torvalds void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds /* malloc.c */ 4151da177e4SLinus Torvalds int jffs2_create_slab_caches(void); 4161da177e4SLinus Torvalds void jffs2_destroy_slab_caches(void); 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize); 4191da177e4SLinus Torvalds void jffs2_free_full_dirent(struct jffs2_full_dirent *); 4201da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_alloc_full_dnode(void); 4211da177e4SLinus Torvalds void jffs2_free_full_dnode(struct jffs2_full_dnode *); 4221da177e4SLinus Torvalds struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void); 4231da177e4SLinus Torvalds void jffs2_free_raw_dirent(struct jffs2_raw_dirent *); 4241da177e4SLinus Torvalds struct jffs2_raw_inode *jffs2_alloc_raw_inode(void); 4251da177e4SLinus Torvalds void jffs2_free_raw_inode(struct jffs2_raw_inode *); 4261da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void); 4271da177e4SLinus Torvalds void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *); 428046b8b98SDavid Woodhouse int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, 429046b8b98SDavid Woodhouse struct jffs2_eraseblock *jeb, int nr); 4309bfeb691SDavid Woodhouse void jffs2_free_refblock(struct jffs2_raw_node_ref *); 4311da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_alloc_node_frag(void); 4321da177e4SLinus Torvalds void jffs2_free_node_frag(struct jffs2_node_frag *); 4331da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_alloc_inode_cache(void); 4341da177e4SLinus Torvalds void jffs2_free_inode_cache(struct jffs2_inode_cache *); 435aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 436aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void); 437aa98d7cfSKaiGai Kohei void jffs2_free_xattr_datum(struct jffs2_xattr_datum *); 438aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void); 439aa98d7cfSKaiGai Kohei void jffs2_free_xattr_ref(struct jffs2_xattr_ref *); 440aa98d7cfSKaiGai Kohei #endif 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* gc.c */ 4431da177e4SLinus Torvalds int jffs2_garbage_collect_pass(struct jffs2_sb_info *c); 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds /* read.c */ 4461da177e4SLinus Torvalds int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4471da177e4SLinus Torvalds struct jffs2_full_dnode *fd, unsigned char *buf, 4481da177e4SLinus Torvalds int ofs, int len); 4491da177e4SLinus Torvalds int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4501da177e4SLinus Torvalds unsigned char *buf, uint32_t offset, uint32_t len); 4511da177e4SLinus Torvalds char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds /* scan.c */ 4541da177e4SLinus Torvalds int jffs2_scan_medium(struct jffs2_sb_info *c); 4551da177e4SLinus Torvalds void jffs2_rotate_lists(struct jffs2_sb_info *c); 456e631ddbaSFerenc Havasi struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino); 457e631ddbaSFerenc Havasi int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 45868270995SDavid Woodhouse int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds /* build.c */ 4611da177e4SLinus Torvalds int jffs2_do_mount_fs(struct jffs2_sb_info *c); 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds /* erase.c */ 4641da177e4SLinus Torvalds void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count); 465c38c1b61SDavid Woodhouse void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4661da177e4SLinus Torvalds 4672f82ce1eSAndrew Victor #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 4681da177e4SLinus Torvalds /* wbuf.c */ 4691da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 4701da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 4711da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4721da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4731da177e4SLinus Torvalds #endif 4741da177e4SLinus Torvalds 475730554d9SArtem B. Bityutskiy #include "debug.h" 476730554d9SArtem B. Bityutskiy 4771da177e4SLinus Torvalds #endif /* __JFFS2_NODELIST_H__ */ 478