fs/jffs2/nodelist.h

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2001-2007 Red Hat, Inc.
   5  *
   6  * Created by David Woodhouse <dwmw2@infradead.org>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  */
  11
  12 #ifndef __JFFS2_NODELIST_H__
  13 #define __JFFS2_NODELIST_H__
  14
  15 #include <linux/fs.h>
  16 #include <linux/types.h>
  17 #include <linux/jffs2.h>
  18 #include "jffs2_fs_sb.h"
  19 #include "jffs2_fs_i.h"
  20 #include "xattr.h"
  21 #include "acl.h"
  22 #include "summary.h"
  23
  24 #ifdef __ECOS
  25 #include "os-ecos.h"
  26 #else
  27 #include <linux/mtd/compatmac.h> /* For compatibility with older kernels */
  28 #include "os-linux.h"
  29 #endif
  30
  31 #define JFFS2_NATIVE_ENDIAN
  32
  33 /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from
  34    whatever OS we're actually running on here too. */
  35
  36 #if defined(JFFS2_NATIVE_ENDIAN)
  37 #define cpu_to_je16(x) ((jint16_t){x})
  38 #define cpu_to_je32(x) ((jint32_t){x})
  39 #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)})
  40
  41 #define constant_cpu_to_je16(x) ((jint16_t){x})
  42 #define constant_cpu_to_je32(x) ((jint32_t){x})
  43
  44 #define je16_to_cpu(x) ((x).v16)
  45 #define je32_to_cpu(x) ((x).v32)
  46 #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m))
  47 #elif defined(JFFS2_BIG_ENDIAN)
  48 #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
  49 #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
  50 #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
  51
  52 #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)})
  53 #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)})
  54
  55 #define je16_to_cpu(x) (be16_to_cpu(x.v16))
  56 #define je32_to_cpu(x) (be32_to_cpu(x.v32))
  57 #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
  58 #elif defined(JFFS2_LITTLE_ENDIAN)
  59 #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
  60 #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
  61 #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
  62
  63 #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)})
  64 #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)})
  65
  66 #define je16_to_cpu(x) (le16_to_cpu(x.v16))
  67 #define je32_to_cpu(x) (le32_to_cpu(x.v32))
  68 #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
  69 #else
  70 #error wibble
  71 #endif
  72
  73 /* The minimal node header size */
  74 #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent)
  75
  76 /*
  77   This is all we need to keep in-core for each raw node during normal
  78   operation. As and when we do read_inode on a particular inode, we can
  79   scan the nodes which are listed for it and build up a proper map of
  80   which nodes are currently valid. JFFSv1 always used to keep that whole
  81   map in core for each inode.
  82 */
  83 struct jffs2_raw_node_ref
  84 {
  85         struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref
  86                 for this object. If this _is_ the last, it points to the inode_cache,
  87                 xattr_ref or xattr_datum instead. The common part of those structures
  88                 has NULL in the first word. See jffs2_raw_ref_to_ic() below */
  89         uint32_t flash_offset;
  90 #define TEST_TOTLEN
  91 #ifdef TEST_TOTLEN
  92         uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
  93 #endif
  94 };
  95
  96 #define REF_LINK_NODE ((int32_t)-1)
  97 #define REF_EMPTY_NODE ((int32_t)-2)
  98
  99 /* Use blocks of about 256 bytes */
 100 #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
 101
 102 static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
 103 {
 104         ref++;
 105
 106         /* Link to another block of refs */
 107         if (ref->flash_offset == REF_LINK_NODE) {
 108                 ref = ref->next_in_ino;
 109                 if (!ref)
 110                         return ref;
 111         }
 112
 113         /* End of chain */
 114         if (ref->flash_offset == REF_EMPTY_NODE)
 115                 return NULL;
 116
 117         return ref;
 118 }
 119
 120 static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
 121 {
 122         while(raw->next_in_ino)
 123                 raw = raw->next_in_ino;
 124
 125         /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and
 126            not actually a jffs2_inode_cache. Check ->class */
 127         return ((struct jffs2_inode_cache *)raw);
 128 }
 129
 130         /* flash_offset & 3 always has to be zero, because nodes are
 131            always aligned at 4 bytes. So we have a couple of extra bits
 132            to play with, which indicate the node's status; see below: */
 133 #define REF_UNCHECKED   0       /* We haven't yet checked the CRC or built its inode */
 134 #define REF_OBSOLETE    1       /* Obsolete, can be completely ignored */
 135 #define REF_PRISTINE    2       /* Completely clean. GC without looking */
 136 #define REF_NORMAL      3       /* Possibly overlapped. Read the page and write again on GC */
 137 #define ref_flags(ref)          ((ref)->flash_offset & 3)
 138 #define ref_offset(ref)         ((ref)->flash_offset & ~3)
 139 #define ref_obsolete(ref)       (((ref)->flash_offset & 3) == REF_OBSOLETE)
 140 #define mark_ref_normal(ref)    do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
 141
 142 /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates
 143    it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get
 144    copied. If you need to do anything different to GC inode-less nodes, then
 145    you need to modify gc.c accordingly. */
 146
 147 /* For each inode in the filesystem, we need to keep a record of
 148    nlink, because it would be a PITA to scan the whole directory tree
 149    at read_inode() time to calculate it, and to keep sufficient information
 150    in the raw_node_ref (basically both parent and child inode number for
 151    dirent nodes) would take more space than this does. We also keep
 152    a pointer to the first physical node which is part of this inode, too.
 153 */
 154 struct jffs2_inode_cache {
 155         /* First part of structure is shared with other objects which
 156            can terminate the raw node refs' next_in_ino list -- which
 157            currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */
 158
 159         struct jffs2_full_dirent *scan_dents; /* Used during scan to hold
 160                 temporary lists of dirents, and later must be set to
 161                 NULL to mark the end of the raw_node_ref->next_in_ino
 162                 chain. */
 163         struct jffs2_raw_node_ref *nodes;
 164         uint8_t class;  /* It's used for identification */
 165
 166         /* end of shared structure */
 167
 168         uint8_t flags;
 169         uint16_t state;
 170         uint32_t ino;
 171         struct jffs2_inode_cache *next;
 172 #ifdef CONFIG_JFFS2_FS_XATTR
 173         struct jffs2_xattr_ref *xref;
 174 #endif
 175         int nlink;
 176 };
 177
 178 /* Inode states for 'state' above. We need the 'GC' state to prevent
 179    someone from doing a read_inode() while we're moving a 'REF_PRISTINE'
 180    node without going through all the iget() nonsense */
 181 #define INO_STATE_UNCHECKED     0       /* CRC checks not yet done */
 182 #define INO_STATE_CHECKING      1       /* CRC checks in progress */
 183 #define INO_STATE_PRESENT       2       /* In core */
 184 #define INO_STATE_CHECKEDABSENT 3       /* Checked, cleared again */
 185 #define INO_STATE_GC            4       /* GCing a 'pristine' node */
 186 #define INO_STATE_READING       5       /* In read_inode() */
 187 #define INO_STATE_CLEARING      6       /* In clear_inode() */
 188
 189 #define INO_FLAGS_XATTR_CHECKED 0x01    /* has no duplicate xattr_ref */
 190
 191 #define RAWNODE_CLASS_INODE_CACHE       0
 192 #define RAWNODE_CLASS_XATTR_DATUM       1
 193 #define RAWNODE_CLASS_XATTR_REF         2
 194
 195 #define INOCACHE_HASHSIZE 128
 196
 197 #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
 198
 199 /*
 200   Larger representation of a raw node, kept in-core only when the
 201   struct inode for this particular ino is instantiated.
 202 */
 203
 204 struct jffs2_full_dnode
 205 {
 206         struct jffs2_raw_node_ref *raw;
 207         uint32_t ofs; /* The offset to which the data of this node belongs */
 208         uint32_t size;
 209         uint32_t frags; /* Number of fragments which currently refer
 210                         to this node. When this reaches zero,
 211                         the node is obsolete.  */
 212 };
 213
 214 /*
 215    Even larger representation of a raw node, kept in-core only while
 216    we're actually building up the original map of which nodes go where,
 217    in read_inode()
 218 */
 219 struct jffs2_tmp_dnode_info
 220 {
 221         struct rb_node rb;
 222         struct jffs2_full_dnode *fn;
 223         uint32_t version;
 224         uint32_t data_crc;
 225         uint32_t partial_crc;
 226         uint16_t csize;
 227         uint16_t overlapped;
 228 };
 229
 230 /* Temporary data structure used during readinode. */
 231 struct jffs2_readinode_info
 232 {
 233         struct rb_root tn_root;
 234         struct jffs2_tmp_dnode_info *mdata_tn;
 235         uint32_t highest_version;
 236         uint32_t latest_mctime;
 237         uint32_t mctime_ver;
 238         struct jffs2_full_dirent *fds;
 239         struct jffs2_raw_node_ref *latest_ref;
 240 };
 241
 242 struct jffs2_full_dirent
 243 {
 244         struct jffs2_raw_node_ref *raw;
 245         struct jffs2_full_dirent *next;
 246         uint32_t version;
 247         uint32_t ino; /* == zero for unlink */
 248         unsigned int nhash;
 249         unsigned char type;
 250         unsigned char name[0];
 251 };
 252
 253 /*
 254   Fragments - used to build a map of which raw node to obtain
 255   data from for each part of the ino
 256 */
 257 struct jffs2_node_frag
 258 {
 259         struct rb_node rb;
 260         struct jffs2_full_dnode *node; /* NULL for holes */
 261         uint32_t size;
 262         uint32_t ofs; /* The offset to which this fragment belongs */
 263 };
 264
 265 struct jffs2_eraseblock
 266 {
 267         struct list_head list;
 268         int bad_count;
 269         uint32_t offset;                /* of this block in the MTD */
 270
 271         uint32_t unchecked_size;
 272         uint32_t used_size;
 273         uint32_t dirty_size;
 274         uint32_t wasted_size;
 275         uint32_t free_size;     /* Note that sector_size - free_size
 276                                    is the address of the first free space */
 277         uint32_t allocated_refs;
 278         struct jffs2_raw_node_ref *first_node;
 279         struct jffs2_raw_node_ref *last_node;
 280
 281         struct jffs2_raw_node_ref *gc_node;     /* Next node to be garbage collected */
 282 };
 283
 284 static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
 285 {
 286         return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
 287 }
 288
 289 #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
 290
 291 #define ALLOC_NORMAL    0       /* Normal allocation */
 292 #define ALLOC_DELETION  1       /* Deletion node. Best to allow it */
 293 #define ALLOC_GC        2       /* Space requested for GC. Give it or die */
 294 #define ALLOC_NORETRY   3       /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */
 295
 296 /* How much dirty space before it goes on the very_dirty_list */
 297 #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2))
 298
 299 /* check if dirty space is more than 255 Byte */
 300 #define ISDIRTY(size) ((size) >  sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
 301
 302 #define PAD(x) (((x)+3)&~3)
 303
 304 static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
 305 {
 306         if (old_valid_dev(rdev)) {
 307                 jdev->old = cpu_to_je16(old_encode_dev(rdev));
 308                 return sizeof(jdev->old);
 309         } else {
 310                 jdev->new = cpu_to_je32(new_encode_dev(rdev));
 311                 return sizeof(jdev->new);
 312         }
 313 }
 314
 315 static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
 316 {
 317         struct rb_node *node = rb_first(root);
 318
 319         if (!node)
 320                 return NULL;
 321
 322         return rb_entry(node, struct jffs2_node_frag, rb);
 323 }
 324
 325 static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
 326 {
 327         struct rb_node *node = rb_last(root);
 328
 329         if (!node)
 330                 return NULL;
 331
 332         return rb_entry(node, struct jffs2_node_frag, rb);
 333 }
 334
 335 #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
 336 #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
 337 #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
 338 #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb)
 339 #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
 340 #define frag_erase(frag, list) rb_erase(&frag->rb, list);
 341
 342 #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
 343 #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
 344 #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
 345 #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
 346 #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
 347 #define tn_erase(tn, list) rb_erase(&tn->rb, list);
 348 #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
 349 #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
 350
 351 /* nodelist.c */
 352 void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
 353 void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
 354 struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
 355 void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new);
 356 void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old);
 357 void jffs2_free_ino_caches(struct jffs2_sb_info *c);
 358 void jffs2_free_raw_node_refs(struct jffs2_sb_info *c);
 359 struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
 360 void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete);
 361 struct rb_node *rb_next(struct rb_node *);
 362 struct rb_node *rb_prev(struct rb_node *);
 363 void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_root *root);
 364 int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
 365 uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
 366 struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
 367                                                struct jffs2_eraseblock *jeb,
 368                                                uint32_t ofs, uint32_t len,
 369                                                struct jffs2_inode_cache *ic);
 370 extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
 371                                    struct jffs2_eraseblock *jeb,
 372                                    struct jffs2_raw_node_ref *ref);
 373
 374 /* nodemgmt.c */
 375 int jffs2_thread_should_wake(struct jffs2_sb_info *c);
 376 int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
 377                         uint32_t *len, int prio, uint32_t sumsize);
 378 int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
 379                         uint32_t *len, uint32_t sumsize);
 380 struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
 381                                                        uint32_t ofs, uint32_t len,
 382                                                        struct jffs2_inode_cache *ic);
 383 void jffs2_complete_reservation(struct jffs2_sb_info *c);
 384 void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
 385
 386 /* write.c */
 387 int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
 388
 389 struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 390                                            struct jffs2_raw_inode *ri, const unsigned char *data,
 391                                            uint32_t datalen, int alloc_mode);
 392 struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 393                                              struct jffs2_raw_dirent *rd, const unsigned char *name,
 394                                              uint32_t namelen, int alloc_mode);
 395 int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 396                             struct jffs2_raw_inode *ri, unsigned char *buf,
 397                             uint32_t offset, uint32_t writelen, uint32_t *retlen);
 398 int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
 399                     struct jffs2_raw_inode *ri, const char *name, int namelen);
 400 int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
 401                     int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
 402 int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
 403                    uint8_t type, const char *name, int namelen, uint32_t time);
 404
 405
 406 /* readinode.c */
 407 int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 408                         uint32_t ino, struct jffs2_raw_inode *latest_node);
 409 int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
 410 void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
 411
 412 /* malloc.c */
 413 int jffs2_create_slab_caches(void);
 414 void jffs2_destroy_slab_caches(void);
 415
 416 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize);
 417 void jffs2_free_full_dirent(struct jffs2_full_dirent *);
 418 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void);
 419 void jffs2_free_full_dnode(struct jffs2_full_dnode *);
 420 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void);
 421 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *);
 422 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
 423 void jffs2_free_raw_inode(struct jffs2_raw_inode *);
 424 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
 425 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
 426 int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
 427                                  struct jffs2_eraseblock *jeb, int nr);
 428 void jffs2_free_refblock(struct jffs2_raw_node_ref *);
 429 struct jffs2_node_frag *jffs2_alloc_node_frag(void);
 430 void jffs2_free_node_frag(struct jffs2_node_frag *);
 431 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
 432 void jffs2_free_inode_cache(struct jffs2_inode_cache *);
 433 #ifdef CONFIG_JFFS2_FS_XATTR
 434 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
 435 void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
 436 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
 437 void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
 438 #endif
 439
 440 /* gc.c */
 441 int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
 442
 443 /* read.c */
 444 int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 445                      struct jffs2_full_dnode *fd, unsigned char *buf,
 446                      int ofs, int len);
 447 int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 448                            unsigned char *buf, uint32_t offset, uint32_t len);
 449 char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
 450
 451 /* scan.c */
 452 int jffs2_scan_medium(struct jffs2_sb_info *c);
 453 void jffs2_rotate_lists(struct jffs2_sb_info *c);
 454 struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
 455 int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 456 int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
 457
 458 /* build.c */
 459 int jffs2_do_mount_fs(struct jffs2_sb_info *c);
 460
 461 /* erase.c */
 462 void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
 463 void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 464
 465 #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
 466 /* wbuf.c */
 467 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
 468 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
 469 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 470 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 471 #endif
 472
 473 #include "debug.h"
 474
 475 #endif /* __JFFS2_NODELIST_H__ */