11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 4c00c310eSDavid Woodhouse * Copyright © 2001-2007 Red Hat, Inc. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #ifndef __JFFS2_NODELIST_H__ 131da177e4SLinus Torvalds #define __JFFS2_NODELIST_H__ 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds #include <linux/fs.h> 161da177e4SLinus Torvalds #include <linux/types.h> 171da177e4SLinus Torvalds #include <linux/jffs2.h> 18cbb9a561SDavid Woodhouse #include "jffs2_fs_sb.h" 19cbb9a561SDavid Woodhouse #include "jffs2_fs_i.h" 20aa98d7cfSKaiGai Kohei #include "xattr.h" 21aa98d7cfSKaiGai Kohei #include "acl.h" 22e631ddbaSFerenc Havasi #include "summary.h" 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #ifdef __ECOS 251da177e4SLinus Torvalds #include "os-ecos.h" 261da177e4SLinus Torvalds #else 271da177e4SLinus Torvalds #include "os-linux.h" 281da177e4SLinus Torvalds #endif 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #define JFFS2_NATIVE_ENDIAN 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from 331da177e4SLinus Torvalds whatever OS we're actually running on here too. */ 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #if defined(JFFS2_NATIVE_ENDIAN) 361da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){x}) 371da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){x}) 381da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)}) 391da177e4SLinus Torvalds 40566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){x}) 41566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){x}) 42566865a2SDavid Woodhouse 431da177e4SLinus Torvalds #define je16_to_cpu(x) ((x).v16) 441da177e4SLinus Torvalds #define je32_to_cpu(x) ((x).v32) 451da177e4SLinus Torvalds #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m)) 461da177e4SLinus Torvalds #elif defined(JFFS2_BIG_ENDIAN) 471da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)}) 481da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)}) 491da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))}) 501da177e4SLinus Torvalds 51566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)}) 52566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)}) 53566865a2SDavid Woodhouse 541da177e4SLinus Torvalds #define je16_to_cpu(x) (be16_to_cpu(x.v16)) 551da177e4SLinus Torvalds #define je32_to_cpu(x) (be32_to_cpu(x.v32)) 561da177e4SLinus Torvalds #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m))) 571da177e4SLinus Torvalds #elif defined(JFFS2_LITTLE_ENDIAN) 581da177e4SLinus Torvalds #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)}) 591da177e4SLinus Torvalds #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)}) 601da177e4SLinus Torvalds #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))}) 611da177e4SLinus Torvalds 62566865a2SDavid Woodhouse #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)}) 63566865a2SDavid Woodhouse #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)}) 64566865a2SDavid Woodhouse 651da177e4SLinus Torvalds #define je16_to_cpu(x) (le16_to_cpu(x.v16)) 661da177e4SLinus Torvalds #define je32_to_cpu(x) (le32_to_cpu(x.v32)) 671da177e4SLinus Torvalds #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m))) 681da177e4SLinus Torvalds #else 691da177e4SLinus Torvalds #error wibble 701da177e4SLinus Torvalds #endif 711da177e4SLinus Torvalds 721e0da3cbSArtem B. Bityutskiy /* The minimal node header size */ 731e0da3cbSArtem B. Bityutskiy #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent) 741e0da3cbSArtem B. Bityutskiy 751da177e4SLinus Torvalds /* 761da177e4SLinus Torvalds This is all we need to keep in-core for each raw node during normal 771da177e4SLinus Torvalds operation. As and when we do read_inode on a particular inode, we can 781da177e4SLinus Torvalds scan the nodes which are listed for it and build up a proper map of 791da177e4SLinus Torvalds which nodes are currently valid. JFFSv1 always used to keep that whole 801da177e4SLinus Torvalds map in core for each inode. 811da177e4SLinus Torvalds */ 821da177e4SLinus Torvalds struct jffs2_raw_node_ref 831da177e4SLinus Torvalds { 841da177e4SLinus Torvalds struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref 85987d47b7SDavid Woodhouse for this object. If this _is_ the last, it points to the inode_cache, 86987d47b7SDavid Woodhouse xattr_ref or xattr_datum instead. The common part of those structures 87987d47b7SDavid Woodhouse has NULL in the first word. See jffs2_raw_ref_to_ic() below */ 881da177e4SLinus Torvalds uint32_t flash_offset; 8919e56ceaSDavid Woodhouse #undef TEST_TOTLEN 90ca89a517SDavid Woodhouse #ifdef TEST_TOTLEN 911da177e4SLinus Torvalds uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */ 92ca89a517SDavid Woodhouse #endif 931da177e4SLinus Torvalds }; 941da177e4SLinus Torvalds 959bfeb691SDavid Woodhouse #define REF_LINK_NODE ((int32_t)-1) 969bfeb691SDavid Woodhouse #define REF_EMPTY_NODE ((int32_t)-2) 979bfeb691SDavid Woodhouse 989bfeb691SDavid Woodhouse /* Use blocks of about 256 bytes */ 999bfeb691SDavid Woodhouse #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1) 1009bfeb691SDavid Woodhouse 1019bfeb691SDavid Woodhouse static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref) 1029bfeb691SDavid Woodhouse { 1039bfeb691SDavid Woodhouse ref++; 1049bfeb691SDavid Woodhouse 1059bfeb691SDavid Woodhouse /* Link to another block of refs */ 1069bfeb691SDavid Woodhouse if (ref->flash_offset == REF_LINK_NODE) { 1079bfeb691SDavid Woodhouse ref = ref->next_in_ino; 1089bfeb691SDavid Woodhouse if (!ref) 1099bfeb691SDavid Woodhouse return ref; 1109bfeb691SDavid Woodhouse } 1119bfeb691SDavid Woodhouse 1129bfeb691SDavid Woodhouse /* End of chain */ 1139bfeb691SDavid Woodhouse if (ref->flash_offset == REF_EMPTY_NODE) 1149bfeb691SDavid Woodhouse return NULL; 1159bfeb691SDavid Woodhouse 1169bfeb691SDavid Woodhouse return ref; 1179bfeb691SDavid Woodhouse } 11899988f7bSDavid Woodhouse 119987d47b7SDavid Woodhouse static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw) 120987d47b7SDavid Woodhouse { 12199988f7bSDavid Woodhouse while(raw->next_in_ino) 122987d47b7SDavid Woodhouse raw = raw->next_in_ino; 123987d47b7SDavid Woodhouse 124987d47b7SDavid Woodhouse /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and 125987d47b7SDavid Woodhouse not actually a jffs2_inode_cache. Check ->class */ 126987d47b7SDavid Woodhouse return ((struct jffs2_inode_cache *)raw); 127987d47b7SDavid Woodhouse } 128987d47b7SDavid Woodhouse 1291da177e4SLinus Torvalds /* flash_offset & 3 always has to be zero, because nodes are 1301da177e4SLinus Torvalds always aligned at 4 bytes. So we have a couple of extra bits 1311da177e4SLinus Torvalds to play with, which indicate the node's status; see below: */ 1321da177e4SLinus Torvalds #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */ 1331da177e4SLinus Torvalds #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */ 1341da177e4SLinus Torvalds #define REF_PRISTINE 2 /* Completely clean. GC without looking */ 1351da177e4SLinus Torvalds #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */ 1361da177e4SLinus Torvalds #define ref_flags(ref) ((ref)->flash_offset & 3) 1371da177e4SLinus Torvalds #define ref_offset(ref) ((ref)->flash_offset & ~3) 1381da177e4SLinus Torvalds #define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE) 1391da177e4SLinus Torvalds #define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0) 1401da177e4SLinus Torvalds 14143dfa07fSDavid Woodhouse /* Dirent nodes should be REF_PRISTINE only if they are not a deletion 14243dfa07fSDavid Woodhouse dirent. Deletion dirents should be REF_NORMAL so that GC gets to 14343dfa07fSDavid Woodhouse throw them away when appropriate */ 14443dfa07fSDavid Woodhouse #define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) ) 14543dfa07fSDavid Woodhouse 1466171586aSDavid Woodhouse /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates 1476171586aSDavid Woodhouse it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get 1486171586aSDavid Woodhouse copied. If you need to do anything different to GC inode-less nodes, then 1496171586aSDavid Woodhouse you need to modify gc.c accordingly. */ 1506171586aSDavid Woodhouse 1511da177e4SLinus Torvalds /* For each inode in the filesystem, we need to keep a record of 1521da177e4SLinus Torvalds nlink, because it would be a PITA to scan the whole directory tree 1531da177e4SLinus Torvalds at read_inode() time to calculate it, and to keep sufficient information 1541da177e4SLinus Torvalds in the raw_node_ref (basically both parent and child inode number for 1551da177e4SLinus Torvalds dirent nodes) would take more space than this does. We also keep 1561da177e4SLinus Torvalds a pointer to the first physical node which is part of this inode, too. 1571da177e4SLinus Torvalds */ 1581da177e4SLinus Torvalds struct jffs2_inode_cache { 159987d47b7SDavid Woodhouse /* First part of structure is shared with other objects which 160987d47b7SDavid Woodhouse can terminate the raw node refs' next_in_ino list -- which 161987d47b7SDavid Woodhouse currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */ 162987d47b7SDavid Woodhouse 1631da177e4SLinus Torvalds struct jffs2_full_dirent *scan_dents; /* Used during scan to hold 1641da177e4SLinus Torvalds temporary lists of dirents, and later must be set to 1651da177e4SLinus Torvalds NULL to mark the end of the raw_node_ref->next_in_ino 1661da177e4SLinus Torvalds chain. */ 1671da177e4SLinus Torvalds struct jffs2_raw_node_ref *nodes; 168987d47b7SDavid Woodhouse uint8_t class; /* It's used for identification */ 169987d47b7SDavid Woodhouse 170987d47b7SDavid Woodhouse /* end of shared structure */ 171987d47b7SDavid Woodhouse 172987d47b7SDavid Woodhouse uint8_t flags; 173987d47b7SDavid Woodhouse uint16_t state; 1741da177e4SLinus Torvalds uint32_t ino; 175987d47b7SDavid Woodhouse struct jffs2_inode_cache *next; 176aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 1778f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *xref; 178aa98d7cfSKaiGai Kohei #endif 17927c72b04SDavid Woodhouse uint32_t pino_nlink; /* Directories store parent inode 18027c72b04SDavid Woodhouse here; other inodes store nlink. 18127c72b04SDavid Woodhouse Zero always means that it's 18227c72b04SDavid Woodhouse completely unlinked. */ 1831da177e4SLinus Torvalds }; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* Inode states for 'state' above. We need the 'GC' state to prevent 1861da177e4SLinus Torvalds someone from doing a read_inode() while we're moving a 'REF_PRISTINE' 1871da177e4SLinus Torvalds node without going through all the iget() nonsense */ 1881da177e4SLinus Torvalds #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */ 1891da177e4SLinus Torvalds #define INO_STATE_CHECKING 1 /* CRC checks in progress */ 1901da177e4SLinus Torvalds #define INO_STATE_PRESENT 2 /* In core */ 1911da177e4SLinus Torvalds #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */ 1921da177e4SLinus Torvalds #define INO_STATE_GC 4 /* GCing a 'pristine' node */ 1931da177e4SLinus Torvalds #define INO_STATE_READING 5 /* In read_inode() */ 19467e345d1SDavid Woodhouse #define INO_STATE_CLEARING 6 /* In clear_inode() */ 1951da177e4SLinus Torvalds 196aa98d7cfSKaiGai Kohei #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ 197aa98d7cfSKaiGai Kohei 198aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_INODE_CACHE 0 199aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_XATTR_DATUM 1 200aa98d7cfSKaiGai Kohei #define RAWNODE_CLASS_XATTR_REF 2 201aa98d7cfSKaiGai Kohei 20265e5a0e1SDaniel Drake #define INOCACHE_HASHSIZE_MIN 128 20365e5a0e1SDaniel Drake #define INOCACHE_HASHSIZE_MAX 1024 2041da177e4SLinus Torvalds 2059fe4854cSDavid Woodhouse #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size) 2069fe4854cSDavid Woodhouse 2071da177e4SLinus Torvalds /* 2081da177e4SLinus Torvalds Larger representation of a raw node, kept in-core only when the 2091da177e4SLinus Torvalds struct inode for this particular ino is instantiated. 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds struct jffs2_full_dnode 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2151da177e4SLinus Torvalds uint32_t ofs; /* The offset to which the data of this node belongs */ 2161da177e4SLinus Torvalds uint32_t size; 2171da177e4SLinus Torvalds uint32_t frags; /* Number of fragments which currently refer 2181da177e4SLinus Torvalds to this node. When this reaches zero, 2191da177e4SLinus Torvalds the node is obsolete. */ 2201da177e4SLinus Torvalds }; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds /* 2231da177e4SLinus Torvalds Even larger representation of a raw node, kept in-core only while 2241da177e4SLinus Torvalds we're actually building up the original map of which nodes go where, 2251da177e4SLinus Torvalds in read_inode() 2261da177e4SLinus Torvalds */ 2271da177e4SLinus Torvalds struct jffs2_tmp_dnode_info 2281da177e4SLinus Torvalds { 2299dee7503SDavid Woodhouse struct rb_node rb; 2301da177e4SLinus Torvalds struct jffs2_full_dnode *fn; 2311da177e4SLinus Torvalds uint32_t version; 2321e0da3cbSArtem B. Bityutskiy uint32_t data_crc; 2331e0da3cbSArtem B. Bityutskiy uint32_t partial_crc; 234df8e96f3SDavid Woodhouse uint16_t csize; 235df8e96f3SDavid Woodhouse uint16_t overlapped; 236df8e96f3SDavid Woodhouse }; 237df8e96f3SDavid Woodhouse 238df8e96f3SDavid Woodhouse /* Temporary data structure used during readinode. */ 239df8e96f3SDavid Woodhouse struct jffs2_readinode_info 240df8e96f3SDavid Woodhouse { 241df8e96f3SDavid Woodhouse struct rb_root tn_root; 242df8e96f3SDavid Woodhouse struct jffs2_tmp_dnode_info *mdata_tn; 243df8e96f3SDavid Woodhouse uint32_t highest_version; 244df8e96f3SDavid Woodhouse uint32_t latest_mctime; 245df8e96f3SDavid Woodhouse uint32_t mctime_ver; 246df8e96f3SDavid Woodhouse struct jffs2_full_dirent *fds; 247df8e96f3SDavid Woodhouse struct jffs2_raw_node_ref *latest_ref; 2481da177e4SLinus Torvalds }; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds struct jffs2_full_dirent 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds struct jffs2_raw_node_ref *raw; 2531da177e4SLinus Torvalds struct jffs2_full_dirent *next; 2541da177e4SLinus Torvalds uint32_t version; 2551da177e4SLinus Torvalds uint32_t ino; /* == zero for unlink */ 2561da177e4SLinus Torvalds unsigned int nhash; 2571da177e4SLinus Torvalds unsigned char type; 2581da177e4SLinus Torvalds unsigned char name[0]; 2591da177e4SLinus Torvalds }; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds /* 2621da177e4SLinus Torvalds Fragments - used to build a map of which raw node to obtain 2631da177e4SLinus Torvalds data from for each part of the ino 2641da177e4SLinus Torvalds */ 2651da177e4SLinus Torvalds struct jffs2_node_frag 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds struct rb_node rb; 2681da177e4SLinus Torvalds struct jffs2_full_dnode *node; /* NULL for holes */ 2691da177e4SLinus Torvalds uint32_t size; 2701da177e4SLinus Torvalds uint32_t ofs; /* The offset to which this fragment belongs */ 2711da177e4SLinus Torvalds }; 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds struct jffs2_eraseblock 2741da177e4SLinus Torvalds { 2751da177e4SLinus Torvalds struct list_head list; 2761da177e4SLinus Torvalds int bad_count; 2771da177e4SLinus Torvalds uint32_t offset; /* of this block in the MTD */ 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds uint32_t unchecked_size; 2801da177e4SLinus Torvalds uint32_t used_size; 2811da177e4SLinus Torvalds uint32_t dirty_size; 2821da177e4SLinus Torvalds uint32_t wasted_size; 2831da177e4SLinus Torvalds uint32_t free_size; /* Note that sector_size - free_size 2841da177e4SLinus Torvalds is the address of the first free space */ 2859bfeb691SDavid Woodhouse uint32_t allocated_refs; 2861da177e4SLinus Torvalds struct jffs2_raw_node_ref *first_node; 2871da177e4SLinus Torvalds struct jffs2_raw_node_ref *last_node; 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */ 2901da177e4SLinus Torvalds }; 2911da177e4SLinus Torvalds 2924ce1f562SFerenc Havasi static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c) 2934ce1f562SFerenc Havasi { 2944ce1f562SFerenc Havasi return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024); 2954ce1f562SFerenc Havasi } 2964ce1f562SFerenc Havasi 297ca89a517SDavid Woodhouse #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c)) 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds #define ALLOC_NORMAL 0 /* Normal allocation */ 3001da177e4SLinus Torvalds #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */ 3011da177e4SLinus Torvalds #define ALLOC_GC 2 /* Space requested for GC. Give it or die */ 3021da177e4SLinus Torvalds #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */ 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds /* How much dirty space before it goes on the very_dirty_list */ 3051da177e4SLinus Torvalds #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2)) 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds /* check if dirty space is more than 255 Byte */ 3081da177e4SLinus Torvalds #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN) 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds #define PAD(x) (((x)+3)&~3) 3111da177e4SLinus Torvalds 312aef9ab47SDavid Woodhouse static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev) 313aef9ab47SDavid Woodhouse { 314aef9ab47SDavid Woodhouse if (old_valid_dev(rdev)) { 31591f80266SAndrew Morton jdev->old_id = cpu_to_je16(old_encode_dev(rdev)); 31691f80266SAndrew Morton return sizeof(jdev->old_id); 317aef9ab47SDavid Woodhouse } else { 31891f80266SAndrew Morton jdev->new_id = cpu_to_je32(new_encode_dev(rdev)); 31991f80266SAndrew Morton return sizeof(jdev->new_id); 320aef9ab47SDavid Woodhouse } 321aef9ab47SDavid Woodhouse } 322aef9ab47SDavid Woodhouse 3231da177e4SLinus Torvalds static inline struct jffs2_node_frag *frag_first(struct rb_root *root) 3241da177e4SLinus Torvalds { 325ea7415ccSAkinobu Mita struct rb_node *node = rb_first(root); 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds if (!node) 3281da177e4SLinus Torvalds return NULL; 329ea7415ccSAkinobu Mita 3301da177e4SLinus Torvalds return rb_entry(node, struct jffs2_node_frag, rb); 3311da177e4SLinus Torvalds } 3328557fd51SArtem B. Bityuckiy 3338557fd51SArtem B. Bityuckiy static inline struct jffs2_node_frag *frag_last(struct rb_root *root) 3348557fd51SArtem B. Bityuckiy { 335ea7415ccSAkinobu Mita struct rb_node *node = rb_last(root); 3368557fd51SArtem B. Bityuckiy 3378557fd51SArtem B. Bityuckiy if (!node) 3388557fd51SArtem B. Bityuckiy return NULL; 339ea7415ccSAkinobu Mita 3408557fd51SArtem B. Bityuckiy return rb_entry(node, struct jffs2_node_frag, rb); 3418557fd51SArtem B. Bityuckiy } 3428557fd51SArtem B. Bityuckiy 3431da177e4SLinus Torvalds #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb) 3441da177e4SLinus Torvalds #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb) 3451da177e4SLinus Torvalds #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb) 3461da177e4SLinus Torvalds #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb) 3471da177e4SLinus Torvalds #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb) 3481da177e4SLinus Torvalds #define frag_erase(frag, list) rb_erase(&frag->rb, list); 3491da177e4SLinus Torvalds 350df8e96f3SDavid Woodhouse #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 351df8e96f3SDavid Woodhouse #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 352df8e96f3SDavid Woodhouse #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) 353df8e96f3SDavid Woodhouse #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb) 354df8e96f3SDavid Woodhouse #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb) 355df8e96f3SDavid Woodhouse #define tn_erase(tn, list) rb_erase(&tn->rb, list); 356df8e96f3SDavid Woodhouse #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb) 357df8e96f3SDavid Woodhouse #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb) 358df8e96f3SDavid Woodhouse 3591da177e4SLinus Torvalds /* nodelist.c */ 3601da177e4SLinus Torvalds void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list); 3611da177e4SLinus Torvalds void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state); 3621da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino); 3631da177e4SLinus Torvalds void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new); 3641da177e4SLinus Torvalds void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old); 3651da177e4SLinus Torvalds void jffs2_free_ino_caches(struct jffs2_sb_info *c); 3661da177e4SLinus Torvalds void jffs2_free_raw_node_refs(struct jffs2_sb_info *c); 3671da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset); 3681da177e4SLinus Torvalds void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete); 369f97117d1SArtem B. Bityutskiy int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn); 37061c4b237SDavid Woodhouse uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size); 3712f785402SDavid Woodhouse struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c, 3722f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3732f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 374fcb75787SDavid Woodhouse struct jffs2_inode_cache *ic); 375ca89a517SDavid Woodhouse extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, 376ca89a517SDavid Woodhouse struct jffs2_eraseblock *jeb, 377ca89a517SDavid Woodhouse struct jffs2_raw_node_ref *ref); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds /* nodemgmt.c */ 3801da177e4SLinus Torvalds int jffs2_thread_should_wake(struct jffs2_sb_info *c); 3819fe4854cSDavid Woodhouse int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, 382e631ddbaSFerenc Havasi uint32_t *len, int prio, uint32_t sumsize); 3839fe4854cSDavid Woodhouse int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, 384e631ddbaSFerenc Havasi uint32_t *len, uint32_t sumsize); 3852f785402SDavid Woodhouse struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, 3862f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 387fcb75787SDavid Woodhouse struct jffs2_inode_cache *ic); 3881da177e4SLinus Torvalds void jffs2_complete_reservation(struct jffs2_sb_info *c); 3891da177e4SLinus Torvalds void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw); 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds /* write.c */ 3921da177e4SLinus Torvalds int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri); 3931da177e4SLinus Torvalds 3949fe4854cSDavid Woodhouse struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3959fe4854cSDavid Woodhouse struct jffs2_raw_inode *ri, const unsigned char *data, 3969fe4854cSDavid Woodhouse uint32_t datalen, int alloc_mode); 3979fe4854cSDavid Woodhouse struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 3989fe4854cSDavid Woodhouse struct jffs2_raw_dirent *rd, const unsigned char *name, 3999fe4854cSDavid Woodhouse uint32_t namelen, int alloc_mode); 4001da177e4SLinus Torvalds int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4011da177e4SLinus Torvalds struct jffs2_raw_inode *ri, unsigned char *buf, 4021da177e4SLinus Torvalds uint32_t offset, uint32_t writelen, uint32_t *retlen); 4039fe4854cSDavid Woodhouse int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, 4049fe4854cSDavid Woodhouse struct jffs2_raw_inode *ri, const char *name, int namelen); 4059fe4854cSDavid Woodhouse int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, 4069fe4854cSDavid Woodhouse int namelen, struct jffs2_inode_info *dead_f, uint32_t time); 4079fe4854cSDavid Woodhouse int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, 4089fe4854cSDavid Woodhouse uint8_t type, const char *name, int namelen, uint32_t time); 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds /* readinode.c */ 4121da177e4SLinus Torvalds int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4131da177e4SLinus Torvalds uint32_t ino, struct jffs2_raw_inode *latest_node); 4141da177e4SLinus Torvalds int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); 4151da177e4SLinus Torvalds void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds /* malloc.c */ 4181da177e4SLinus Torvalds int jffs2_create_slab_caches(void); 4191da177e4SLinus Torvalds void jffs2_destroy_slab_caches(void); 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize); 4221da177e4SLinus Torvalds void jffs2_free_full_dirent(struct jffs2_full_dirent *); 4231da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_alloc_full_dnode(void); 4241da177e4SLinus Torvalds void jffs2_free_full_dnode(struct jffs2_full_dnode *); 4251da177e4SLinus Torvalds struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void); 4261da177e4SLinus Torvalds void jffs2_free_raw_dirent(struct jffs2_raw_dirent *); 4271da177e4SLinus Torvalds struct jffs2_raw_inode *jffs2_alloc_raw_inode(void); 4281da177e4SLinus Torvalds void jffs2_free_raw_inode(struct jffs2_raw_inode *); 4291da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void); 4301da177e4SLinus Torvalds void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *); 431046b8b98SDavid Woodhouse int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, 432046b8b98SDavid Woodhouse struct jffs2_eraseblock *jeb, int nr); 4339bfeb691SDavid Woodhouse void jffs2_free_refblock(struct jffs2_raw_node_ref *); 4341da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_alloc_node_frag(void); 4351da177e4SLinus Torvalds void jffs2_free_node_frag(struct jffs2_node_frag *); 4361da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_alloc_inode_cache(void); 4371da177e4SLinus Torvalds void jffs2_free_inode_cache(struct jffs2_inode_cache *); 438aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 439aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void); 440aa98d7cfSKaiGai Kohei void jffs2_free_xattr_datum(struct jffs2_xattr_datum *); 441aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void); 442aa98d7cfSKaiGai Kohei void jffs2_free_xattr_ref(struct jffs2_xattr_ref *); 443aa98d7cfSKaiGai Kohei #endif 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds /* gc.c */ 4461da177e4SLinus Torvalds int jffs2_garbage_collect_pass(struct jffs2_sb_info *c); 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* read.c */ 4491da177e4SLinus Torvalds int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4501da177e4SLinus Torvalds struct jffs2_full_dnode *fd, unsigned char *buf, 4511da177e4SLinus Torvalds int ofs, int len); 4521da177e4SLinus Torvalds int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, 4531da177e4SLinus Torvalds unsigned char *buf, uint32_t offset, uint32_t len); 4541da177e4SLinus Torvalds char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f); 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds /* scan.c */ 4571da177e4SLinus Torvalds int jffs2_scan_medium(struct jffs2_sb_info *c); 4581da177e4SLinus Torvalds void jffs2_rotate_lists(struct jffs2_sb_info *c); 459e631ddbaSFerenc Havasi struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino); 460e631ddbaSFerenc Havasi int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 46168270995SDavid Woodhouse int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size); 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds /* build.c */ 4641da177e4SLinus Torvalds int jffs2_do_mount_fs(struct jffs2_sb_info *c); 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* erase.c */ 4679957abeaSJoakim Tjernlund int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count); 468c38c1b61SDavid Woodhouse void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4691da177e4SLinus Torvalds 4702f82ce1eSAndrew Victor #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 4711da177e4SLinus Torvalds /* wbuf.c */ 4721da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 4731da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 4741da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4751da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 4761da177e4SLinus Torvalds #endif 4771da177e4SLinus Torvalds 478730554d9SArtem B. Bityutskiy #include "debug.h" 479730554d9SArtem B. Bityutskiy 4801da177e4SLinus Torvalds #endif /* __JFFS2_NODELIST_H__ */ 481