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 1.51 2004/11/16 20:36:11 dwmw2 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 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) 101 102 #if (!defined CONFIG_JFFS2_FS_NAND && !defined CONFIG_JFFS2_FS_NOR_ECC) 103 #define jffs2_can_mark_obsolete(c) (1) 104 #define jffs2_cleanmarker_oob(c) (0) 105 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 106 107 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf)) 108 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf)) 109 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; }) 110 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; }) 111 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 112 #define jffs2_nand_flash_setup(c) (0) 113 #define jffs2_nand_flash_cleanup(c) do {} while(0) 114 #define jffs2_wbuf_dirty(c) (0) 115 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 116 #define jffs2_wbuf_timeout NULL 117 #define jffs2_wbuf_process NULL 118 #define jffs2_nor_ecc(c) (0) 119 #define jffs2_nor_ecc_flash_setup(c) (0) 120 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) 121 122 #else /* NAND and/or ECC'd NOR support present */ 123 124 #define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM) 125 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 126 127 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) 128 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) 129 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 130 131 /* wbuf.c */ 132 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); 133 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 134 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 135 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 136 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 137 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 138 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 139 void jffs2_wbuf_timeout(unsigned long data); 140 void jffs2_wbuf_process(void *data); 141 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 142 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 143 int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 144 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 145 #ifdef CONFIG_JFFS2_FS_NOR_ECC 146 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC)) 147 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c); 148 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c); 149 #else 150 #define jffs2_nor_ecc(c) (0) 151 #define jffs2_nor_ecc_flash_setup(c) (0) 152 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) 153 #endif /* NOR ECC */ 154 #endif /* NAND */ 155 156 /* erase.c */ 157 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) 158 { 159 OFNI_BS_2SFFJ(c)->s_dirt = 1; 160 } 161 162 /* background.c */ 163 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 164 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 165 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 166 167 /* dir.c */ 168 extern struct file_operations jffs2_dir_operations; 169 extern struct inode_operations jffs2_dir_inode_operations; 170 171 /* file.c */ 172 extern struct file_operations jffs2_file_operations; 173 extern struct inode_operations jffs2_file_inode_operations; 174 extern struct address_space_operations jffs2_file_address_operations; 175 int jffs2_fsync(struct file *, struct dentry *, int); 176 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 177 178 /* ioctl.c */ 179 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); 180 181 /* symlink.c */ 182 extern struct inode_operations jffs2_symlink_inode_operations; 183 184 /* fs.c */ 185 int jffs2_setattr (struct dentry *, struct iattr *); 186 void jffs2_read_inode (struct inode *); 187 void jffs2_clear_inode (struct inode *); 188 void jffs2_dirty_inode(struct inode *inode); 189 struct inode *jffs2_new_inode (struct inode *dir_i, int mode, 190 struct jffs2_raw_inode *ri); 191 int jffs2_statfs (struct super_block *, struct kstatfs *); 192 void jffs2_write_super (struct super_block *); 193 int jffs2_remount_fs (struct super_block *, int *, char *); 194 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 195 void jffs2_gc_release_inode(struct jffs2_sb_info *c, 196 struct jffs2_inode_info *f); 197 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 198 int inum, int nlink); 199 200 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 201 struct jffs2_inode_info *f, 202 unsigned long offset, 203 unsigned long *priv); 204 void jffs2_gc_release_page(struct jffs2_sb_info *c, 205 unsigned char *pg, 206 unsigned long *priv); 207 void jffs2_flash_cleanup(struct jffs2_sb_info *c); 208 209 210 /* writev.c */ 211 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 212 unsigned long count, loff_t to, size_t *retlen); 213 214 215 #endif /* __JFFS2_OS_LINUX_H__ */ 216 217 218