fs/jffs2/nodelist.h

0001 /*
0002  * JFFS2 -- Journalling Flash File System, Version 2.
0003  *
0004  * Copyright © 2001-2007 Red Hat, Inc.
0005  *
0006  * Created by David Woodhouse <dwmw2@infradead.org>
0007  *
0008  * For licensing information, see the file 'LICENCE' in this directory.
0009  *
0010  */
0011
0012 #ifndef __JFFS2_NODELIST_H__
0013 #define __JFFS2_NODELIST_H__
0014
0015 #include <linux/fs.h>
0016 #include <linux/types.h>
0017 #include <linux/jffs2.h>
0018 #include "jffs2_fs_sb.h"
0019 #include "jffs2_fs_i.h"
0020 #include "xattr.h"
0021 #include "acl.h"
0022 #include "summary.h"
0023
0024 #ifdef __ECOS
0025 #include "os-ecos.h"
0026 #else
0027 #include "os-linux.h"
0028 #endif
0029
0030 #define JFFS2_NATIVE_ENDIAN
0031
0032 /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from
0033    whatever OS we're actually running on here too. */
0034
0035 #if defined(JFFS2_NATIVE_ENDIAN)
0036 #define cpu_to_je16(x) ((jint16_t){x})
0037 #define cpu_to_je32(x) ((jint32_t){x})
0038 #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)})
0039
0040 #define constant_cpu_to_je16(x) ((jint16_t){x})
0041 #define constant_cpu_to_je32(x) ((jint32_t){x})
0042
0043 #define je16_to_cpu(x) ((x).v16)
0044 #define je32_to_cpu(x) ((x).v32)
0045 #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m))
0046 #elif defined(JFFS2_BIG_ENDIAN)
0047 #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
0048 #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
0049 #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
0050
0051 #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)})
0052 #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)})
0053
0054 #define je16_to_cpu(x) (be16_to_cpu(x.v16))
0055 #define je32_to_cpu(x) (be32_to_cpu(x.v32))
0056 #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
0057 #elif defined(JFFS2_LITTLE_ENDIAN)
0058 #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
0059 #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
0060 #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
0061
0062 #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)})
0063 #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)})
0064
0065 #define je16_to_cpu(x) (le16_to_cpu(x.v16))
0066 #define je32_to_cpu(x) (le32_to_cpu(x.v32))
0067 #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
0068 #else
0069 #error wibble
0070 #endif
0071
0072 /* The minimal node header size */
0073 #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent)
0074
0075 /*
0076   This is all we need to keep in-core for each raw node during normal
0077   operation. As and when we do read_inode on a particular inode, we can
0078   scan the nodes which are listed for it and build up a proper map of
0079   which nodes are currently valid. JFFSv1 always used to keep that whole
0080   map in core for each inode.
0081 */
0082 struct jffs2_raw_node_ref
0083 {
0084     struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref
0085         for this object. If this _is_ the last, it points to the inode_cache,
0086         xattr_ref or xattr_datum instead. The common part of those structures
0087         has NULL in the first word. See jffs2_raw_ref_to_ic() below */
0088     uint32_t flash_offset;
0089 #undef TEST_TOTLEN
0090 #ifdef TEST_TOTLEN
0091     uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
0092 #endif
0093 };
0094
0095 #define REF_LINK_NODE ((int32_t)-1)
0096 #define REF_EMPTY_NODE ((int32_t)-2)
0097
0098 /* Use blocks of about 256 bytes */
0099 #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
0100
0101 static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
0102 {
0103     ref++;
0104
0105     /* Link to another block of refs */
0106     if (ref->flash_offset == REF_LINK_NODE) {
0107         ref = ref->next_in_ino;
0108         if (!ref)
0109             return ref;
0110     }
0111
0112     /* End of chain */
0113     if (ref->flash_offset == REF_EMPTY_NODE)
0114         return NULL;
0115
0116     return ref;
0117 }
0118
0119 static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
0120 {
0121     while(raw->next_in_ino)
0122         raw = raw->next_in_ino;
0123
0124     /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and
0125        not actually a jffs2_inode_cache. Check ->class */
0126     return ((struct jffs2_inode_cache *)raw);
0127 }
0128
0129     /* flash_offset & 3 always has to be zero, because nodes are
0130        always aligned at 4 bytes. So we have a couple of extra bits
0131        to play with, which indicate the node's status; see below: */
0132 #define REF_UNCHECKED   0   /* We haven't yet checked the CRC or built its inode */
0133 #define REF_OBSOLETE    1   /* Obsolete, can be completely ignored */
0134 #define REF_PRISTINE    2   /* Completely clean. GC without looking */
0135 #define REF_NORMAL  3   /* Possibly overlapped. Read the page and write again on GC */
0136 #define ref_flags(ref)      ((ref)->flash_offset & 3)
0137 #define ref_offset(ref)     ((ref)->flash_offset & ~3)
0138 #define ref_obsolete(ref)   (((ref)->flash_offset & 3) == REF_OBSOLETE)
0139 #define mark_ref_normal(ref)    do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
0140
0141 /* Dirent nodes should be REF_PRISTINE only if they are not a deletion
0142    dirent. Deletion dirents should be REF_NORMAL so that GC gets to
0143    throw them away when appropriate */
0144 #define dirent_node_state(rd)   ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) )
0145
0146 /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates
0147    it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get
0148    copied. If you need to do anything different to GC inode-less nodes, then
0149    you need to modify gc.c accordingly. */
0150
0151 /* For each inode in the filesystem, we need to keep a record of
0152    nlink, because it would be a PITA to scan the whole directory tree
0153    at read_inode() time to calculate it, and to keep sufficient information
0154    in the raw_node_ref (basically both parent and child inode number for
0155    dirent nodes) would take more space than this does. We also keep
0156    a pointer to the first physical node which is part of this inode, too.
0157 */
0158 struct jffs2_inode_cache {
0159     /* First part of structure is shared with other objects which
0160        can terminate the raw node refs' next_in_ino list -- which
0161        currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */
0162
0163     struct jffs2_full_dirent *scan_dents; /* Used during scan to hold
0164         temporary lists of dirents, and later must be set to
0165         NULL to mark the end of the raw_node_ref->next_in_ino
0166         chain. */
0167     struct jffs2_raw_node_ref *nodes;
0168     uint8_t class;  /* It's used for identification */
0169
0170     /* end of shared structure */
0171
0172     uint8_t flags;
0173     uint16_t state;
0174     uint32_t ino;
0175     struct jffs2_inode_cache *next;
0176 #ifdef CONFIG_JFFS2_FS_XATTR
0177     struct jffs2_xattr_ref *xref;
0178 #endif
0179     uint32_t pino_nlink;    /* Directories store parent inode
0180                    here; other inodes store nlink.
0181                    Zero always means that it's
0182                    completely unlinked. */
0183 };
0184
0185 /* Inode states for 'state' above. We need the 'GC' state to prevent
0186    someone from doing a read_inode() while we're moving a 'REF_PRISTINE'
0187    node without going through all the iget() nonsense */
0188 #define INO_STATE_UNCHECKED 0   /* CRC checks not yet done */
0189 #define INO_STATE_CHECKING  1   /* CRC checks in progress */
0190 #define INO_STATE_PRESENT   2   /* In core */
0191 #define INO_STATE_CHECKEDABSENT 3   /* Checked, cleared again */
0192 #define INO_STATE_GC        4   /* GCing a 'pristine' node */
0193 #define INO_STATE_READING   5   /* In read_inode() */
0194 #define INO_STATE_CLEARING  6   /* In clear_inode() */
0195
0196 #define INO_FLAGS_XATTR_CHECKED 0x01    /* has no duplicate xattr_ref */
0197 #define INO_FLAGS_IS_DIR    0x02    /* is a directory */
0198
0199 #define RAWNODE_CLASS_INODE_CACHE   0
0200 #define RAWNODE_CLASS_XATTR_DATUM   1
0201 #define RAWNODE_CLASS_XATTR_REF     2
0202
0203 #define INOCACHE_HASHSIZE_MIN 128
0204 #define INOCACHE_HASHSIZE_MAX 1024
0205
0206 #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
0207
0208 /*
0209   Larger representation of a raw node, kept in-core only when the
0210   struct inode for this particular ino is instantiated.
0211 */
0212
0213 struct jffs2_full_dnode
0214 {
0215     struct jffs2_raw_node_ref *raw;
0216     uint32_t ofs; /* The offset to which the data of this node belongs */
0217     uint32_t size;
0218     uint32_t frags; /* Number of fragments which currently refer
0219             to this node. When this reaches zero,
0220             the node is obsolete.  */
0221 };
0222
0223 /*
0224    Even larger representation of a raw node, kept in-core only while
0225    we're actually building up the original map of which nodes go where,
0226    in read_inode()
0227 */
0228 struct jffs2_tmp_dnode_info
0229 {
0230     struct rb_node rb;
0231     struct jffs2_full_dnode *fn;
0232     uint32_t version;
0233     uint32_t data_crc;
0234     uint32_t partial_crc;
0235     uint32_t csize;
0236     uint16_t overlapped;
0237 };
0238
0239 /* Temporary data structure used during readinode. */
0240 struct jffs2_readinode_info
0241 {
0242     struct rb_root tn_root;
0243     struct jffs2_tmp_dnode_info *mdata_tn;
0244     uint32_t highest_version;
0245     uint32_t latest_mctime;
0246     uint32_t mctime_ver;
0247     struct jffs2_full_dirent *fds;
0248     struct jffs2_raw_node_ref *latest_ref;
0249 };
0250
0251 struct jffs2_full_dirent
0252 {
0253     union {
0254         struct jffs2_raw_node_ref *raw;
0255         struct jffs2_inode_cache *ic; /* Just during part of build */
0256     };
0257     struct jffs2_full_dirent *next;
0258     uint32_t version;
0259     uint32_t ino; /* == zero for unlink */
0260     unsigned int nhash;
0261     unsigned char type;
0262     unsigned char name[];
0263 };
0264
0265 /*
0266   Fragments - used to build a map of which raw node to obtain
0267   data from for each part of the ino
0268 */
0269 struct jffs2_node_frag
0270 {
0271     struct rb_node rb;
0272     struct jffs2_full_dnode *node; /* NULL for holes */
0273     uint32_t size;
0274     uint32_t ofs; /* The offset to which this fragment belongs */
0275 };
0276
0277 struct jffs2_eraseblock
0278 {
0279     struct list_head list;
0280     int bad_count;
0281     uint32_t offset;        /* of this block in the MTD */
0282
0283     uint32_t unchecked_size;
0284     uint32_t used_size;
0285     uint32_t dirty_size;
0286     uint32_t wasted_size;
0287     uint32_t free_size; /* Note that sector_size - free_size
0288                    is the address of the first free space */
0289     uint32_t allocated_refs;
0290     struct jffs2_raw_node_ref *first_node;
0291     struct jffs2_raw_node_ref *last_node;
0292
0293     struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */
0294 };
0295
0296 static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
0297 {
0298     return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
0299 }
0300
0301 #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
0302
0303 #define ALLOC_NORMAL    0   /* Normal allocation */
0304 #define ALLOC_DELETION  1   /* Deletion node. Best to allow it */
0305 #define ALLOC_GC    2   /* Space requested for GC. Give it or die */
0306 #define ALLOC_NORETRY   3   /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */
0307
0308 /* How much dirty space before it goes on the very_dirty_list */
0309 #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2))
0310
0311 /* check if dirty space is more than 255 Byte */
0312 #define ISDIRTY(size) ((size) >  sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
0313
0314 #define PAD(x) (((x)+3)&~3)
0315
0316 static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
0317 {
0318     if (old_valid_dev(rdev)) {
0319         jdev->old_id = cpu_to_je16(old_encode_dev(rdev));
0320         return sizeof(jdev->old_id);
0321     } else {
0322         jdev->new_id = cpu_to_je32(new_encode_dev(rdev));
0323         return sizeof(jdev->new_id);
0324     }
0325 }
0326
0327 static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
0328 {
0329     struct rb_node *node = rb_first(root);
0330
0331     if (!node)
0332         return NULL;
0333
0334     return rb_entry(node, struct jffs2_node_frag, rb);
0335 }
0336
0337 static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
0338 {
0339     struct rb_node *node = rb_last(root);
0340
0341     if (!node)
0342         return NULL;
0343
0344     return rb_entry(node, struct jffs2_node_frag, rb);
0345 }
0346
0347 #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
0348 #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
0349 #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
0350 #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb)
0351 #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
0352 #define frag_erase(frag, list) rb_erase(&frag->rb, list)
0353
0354 #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
0355 #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
0356 #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
0357 #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
0358 #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
0359 #define tn_erase(tn, list) rb_erase(&tn->rb, list)
0360 #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
0361 #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
0362
0363 /* nodelist.c */
0364 void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
0365 void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
0366 struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
0367 void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new);
0368 void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old);
0369 void jffs2_free_ino_caches(struct jffs2_sb_info *c);
0370 void jffs2_free_raw_node_refs(struct jffs2_sb_info *c);
0371 struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
0372 void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete);
0373 int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
0374 uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
0375 struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
0376                            struct jffs2_eraseblock *jeb,
0377                            uint32_t ofs, uint32_t len,
0378                            struct jffs2_inode_cache *ic);
0379 extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
0380                    struct jffs2_eraseblock *jeb,
0381                    struct jffs2_raw_node_ref *ref);
0382
0383 /* nodemgmt.c */
0384 int jffs2_thread_should_wake(struct jffs2_sb_info *c);
0385 int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
0386             uint32_t *len, int prio, uint32_t sumsize);
0387 int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
0388             uint32_t *len, uint32_t sumsize);
0389 struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
0390                                uint32_t ofs, uint32_t len,
0391                                struct jffs2_inode_cache *ic);
0392 void jffs2_complete_reservation(struct jffs2_sb_info *c);
0393 void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
0394
0395 /* write.c */
0396 int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
0397
0398 struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0399                        struct jffs2_raw_inode *ri, const unsigned char *data,
0400                        uint32_t datalen, int alloc_mode);
0401 struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0402                          struct jffs2_raw_dirent *rd, const unsigned char *name,
0403                          uint32_t namelen, int alloc_mode);
0404 int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0405                 struct jffs2_raw_inode *ri, unsigned char *buf,
0406                 uint32_t offset, uint32_t writelen, uint32_t *retlen);
0407 int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
0408             struct jffs2_raw_inode *ri, const struct qstr *qstr);
0409 int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
0410             int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
0411 int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
0412            uint8_t type, const char *name, int namelen, uint32_t time);
0413
0414
0415 /* readinode.c */
0416 int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0417             uint32_t ino, struct jffs2_raw_inode *latest_node);
0418 int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
0419 void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
0420
0421 /* malloc.c */
0422 int jffs2_create_slab_caches(void);
0423 void jffs2_destroy_slab_caches(void);
0424
0425 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize);
0426 void jffs2_free_full_dirent(struct jffs2_full_dirent *);
0427 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void);
0428 void jffs2_free_full_dnode(struct jffs2_full_dnode *);
0429 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void);
0430 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *);
0431 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
0432 void jffs2_free_raw_inode(struct jffs2_raw_inode *);
0433 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
0434 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
0435 int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
0436                  struct jffs2_eraseblock *jeb, int nr);
0437 void jffs2_free_refblock(struct jffs2_raw_node_ref *);
0438 struct jffs2_node_frag *jffs2_alloc_node_frag(void);
0439 void jffs2_free_node_frag(struct jffs2_node_frag *);
0440 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
0441 void jffs2_free_inode_cache(struct jffs2_inode_cache *);
0442 #ifdef CONFIG_JFFS2_FS_XATTR
0443 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
0444 void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
0445 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
0446 void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
0447 #endif
0448
0449 /* gc.c */
0450 int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
0451
0452 /* read.c */
0453 int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0454              struct jffs2_full_dnode *fd, unsigned char *buf,
0455              int ofs, int len);
0456 int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
0457                unsigned char *buf, uint32_t offset, uint32_t len);
0458 char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
0459
0460 /* scan.c */
0461 int jffs2_scan_medium(struct jffs2_sb_info *c);
0462 void jffs2_rotate_lists(struct jffs2_sb_info *c);
0463 struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
0464 int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
0465 int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
0466
0467 /* build.c */
0468 int jffs2_do_mount_fs(struct jffs2_sb_info *c);
0469
0470 /* erase.c */
0471 int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
0472 void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
0473
0474 #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
0475 /* wbuf.c */
0476 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
0477 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
0478 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
0479 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
0480 #endif
0481
0482 #include "debug.h"
0483
0484 #endif /* __JFFS2_NODELIST_H__ */