1 /* 2 * JFFS2 -- Journalling Flash File System, Version 2. 3 * 4 * Copyright (C) 2002-2003 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 * $Id: os-linux.h,v 1.54 2005/02/09 09:23:53 pavlov Exp $ 11 * 12 */ 13 14 #ifndef __JFFS2_OS_LINUX_H__ 15 #define __JFFS2_OS_LINUX_H__ 16 #include <linux/version.h> 17 18 /* JFFS2 uses Linux mode bits natively -- no need for conversion */ 19 #define os_to_jffs2_mode(x) (x) 20 #define jffs2_to_os_mode(x) (x) 21 22 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73) 23 #define kstatfs statfs 24 #endif 25 26 struct kstatfs; 27 struct kvec; 28 29 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2) 30 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode)) 31 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) 32 #define JFFS2_SB_INFO(sb) (sb->s_fs_info) 33 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) 34 #elif defined(JFFS2_OUT_OF_KERNEL) 35 #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u) 36 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) ) 37 #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u) 38 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) ) 39 #else 40 #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i) 41 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) ) 42 #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb) 43 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) ) 44 #endif 45 46 47 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) 48 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) 49 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) 50 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) 51 52 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1) 53 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f))) 54 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f))) 55 #else 56 #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev))) 57 #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev))) 58 #endif 59 60 /* Urgh. The things we do to keep the 2.4 build working */ 61 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47) 62 #define ITIME(sec) ((struct timespec){sec, 0}) 63 #define I_SEC(tv) ((tv).tv_sec) 64 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) 65 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) 66 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) 67 #else 68 #define ITIME(x) (x) 69 #define I_SEC(x) (x) 70 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime) 71 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime) 72 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime) 73 #endif 74 75 #define sleep_on_spinunlock(wq, s) \ 76 do { \ 77 DECLARE_WAITQUEUE(__wait, current); \ 78 add_wait_queue((wq), &__wait); \ 79 set_current_state(TASK_UNINTERRUPTIBLE); \ 80 spin_unlock(s); \ 81 schedule(); \ 82 remove_wait_queue((wq), &__wait); \ 83 } while(0) 84 85 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) 86 { 87 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2) 88 f->highest_version = 0; 89 f->fragtree = RB_ROOT; 90 f->metadata = NULL; 91 f->dents = NULL; 92 f->flags = 0; 93 f->usercompr = 0; 94 #else 95 memset(f, 0, sizeof(*f)); 96 init_MUTEX_LOCKED(&f->sem); 97 #endif 98 } 99 100 101 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) 102 #define jffs2_is_writebuffered(c) (c->wbuf != NULL) 103 104 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER 105 #define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) ) 106 #define jffs2_can_mark_obsolete(c) (1) 107 #define jffs2_cleanmarker_oob(c) (0) 108 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 109 110 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf)) 111 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf)) 112 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; }) 113 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; }) 114 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 115 #define jffs2_nand_flash_setup(c) (0) 116 #define jffs2_nand_flash_cleanup(c) do {} while(0) 117 #define jffs2_wbuf_dirty(c) (0) 118 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 119 #define jffs2_wbuf_timeout NULL 120 #define jffs2_wbuf_process NULL 121 #define jffs2_nor_ecc(c) (0) 122 #define jffs2_dataflash(c) (0) 123 #define jffs2_nor_ecc_flash_setup(c) (0) 124 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) 125 126 #else /* NAND and/or ECC'd NOR support present */ 127 128 #define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size ) 129 #define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM) 130 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 131 132 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) 133 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) 134 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 135 136 /* wbuf.c */ 137 int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino); 138 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 139 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 140 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 141 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 142 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 143 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 144 void jffs2_wbuf_timeout(unsigned long data); 145 void jffs2_wbuf_process(void *data); 146 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 147 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 148 int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 149 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 150 151 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC)) 152 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c); 153 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c); 154 155 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 156 int jffs2_dataflash_setup(struct jffs2_sb_info *c); 157 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 158 159 #endif /* WRITEBUFFER */ 160 161 /* erase.c */ 162 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) 163 { 164 OFNI_BS_2SFFJ(c)->s_dirt = 1; 165 } 166 167 /* background.c */ 168 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 169 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 170 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 171 172 /* dir.c */ 173 extern struct file_operations jffs2_dir_operations; 174 extern struct inode_operations jffs2_dir_inode_operations; 175 176 /* file.c */ 177 extern struct file_operations jffs2_file_operations; 178 extern struct inode_operations jffs2_file_inode_operations; 179 extern struct address_space_operations jffs2_file_address_operations; 180 int jffs2_fsync(struct file *, struct dentry *, int); 181 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 182 183 /* ioctl.c */ 184 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); 185 186 /* symlink.c */ 187 extern struct inode_operations jffs2_symlink_inode_operations; 188 189 /* fs.c */ 190 int jffs2_setattr (struct dentry *, struct iattr *); 191 void jffs2_read_inode (struct inode *); 192 void jffs2_clear_inode (struct inode *); 193 void jffs2_dirty_inode(struct inode *inode); 194 struct inode *jffs2_new_inode (struct inode *dir_i, int mode, 195 struct jffs2_raw_inode *ri); 196 int jffs2_statfs (struct super_block *, struct kstatfs *); 197 void jffs2_write_super (struct super_block *); 198 int jffs2_remount_fs (struct super_block *, int *, char *); 199 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 200 void jffs2_gc_release_inode(struct jffs2_sb_info *c, 201 struct jffs2_inode_info *f); 202 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 203 int inum, int nlink); 204 205 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 206 struct jffs2_inode_info *f, 207 unsigned long offset, 208 unsigned long *priv); 209 void jffs2_gc_release_page(struct jffs2_sb_info *c, 210 unsigned char *pg, 211 unsigned long *priv); 212 void jffs2_flash_cleanup(struct jffs2_sb_info *c); 213 214 215 /* writev.c */ 216 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 217 unsigned long count, loff_t to, size_t *retlen); 218 219 220 #endif /* __JFFS2_OS_LINUX_H__ */ 221 222 223