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 1.64 2005/09/30 13:59:13 dedekind Exp $ 11 * 12 */ 13 14 #ifndef __JFFS2_OS_LINUX_H__ 15 #define __JFFS2_OS_LINUX_H__ 16 17 /* JFFS2 uses Linux mode bits natively -- no need for conversion */ 18 #define os_to_jffs2_mode(x) (x) 19 #define jffs2_to_os_mode(x) (x) 20 21 struct kstatfs; 22 struct kvec; 23 24 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode)) 25 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) 26 #define JFFS2_SB_INFO(sb) (sb->s_fs_info) 27 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) 28 29 30 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) 31 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) 32 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) 33 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) 34 35 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f))) 36 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f))) 37 38 #define ITIME(sec) ((struct timespec){sec, 0}) 39 #define I_SEC(tv) ((tv).tv_sec) 40 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) 41 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) 42 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) 43 44 #define sleep_on_spinunlock(wq, s) \ 45 do { \ 46 DECLARE_WAITQUEUE(__wait, current); \ 47 add_wait_queue((wq), &__wait); \ 48 set_current_state(TASK_UNINTERRUPTIBLE); \ 49 spin_unlock(s); \ 50 schedule(); \ 51 remove_wait_queue((wq), &__wait); \ 52 } while(0) 53 54 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) 55 { 56 f->highest_version = 0; 57 f->fragtree = RB_ROOT; 58 f->metadata = NULL; 59 f->dents = NULL; 60 f->target = NULL; 61 f->flags = 0; 62 f->usercompr = 0; 63 } 64 65 66 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) 67 68 #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) 69 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER 70 71 72 #ifdef CONFIG_JFFS2_SUMMARY 73 #define jffs2_can_mark_obsolete(c) (0) 74 #else 75 #define jffs2_can_mark_obsolete(c) (1) 76 #endif 77 78 #define jffs2_is_writebuffered(c) (0) 79 #define jffs2_cleanmarker_oob(c) (0) 80 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 81 82 #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) 83 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf)) 84 #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) 85 #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) 86 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 87 #define jffs2_nand_flash_setup(c) (0) 88 #define jffs2_nand_flash_cleanup(c) do {} while(0) 89 #define jffs2_wbuf_dirty(c) (0) 90 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 91 #define jffs2_wbuf_timeout NULL 92 #define jffs2_wbuf_process NULL 93 #define jffs2_nor_ecc(c) (0) 94 #define jffs2_dataflash(c) (0) 95 #define jffs2_nor_wbuf_flash(c) (0) 96 #define jffs2_nor_ecc_flash_setup(c) (0) 97 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) 98 #define jffs2_dataflash_setup(c) (0) 99 #define jffs2_dataflash_cleanup(c) do {} while (0) 100 #define jffs2_nor_wbuf_flash_setup(c) (0) 101 #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) 102 103 #else /* NAND and/or ECC'd NOR support present */ 104 105 #define jffs2_is_writebuffered(c) (c->wbuf != NULL) 106 107 #ifdef CONFIG_JFFS2_SUMMARY 108 #define jffs2_can_mark_obsolete(c) (0) 109 #else 110 #define jffs2_can_mark_obsolete(c) \ 111 ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC|MTD_PROGRAM_REGIONS))) || \ 112 c->mtd->type == MTD_RAM) 113 #endif 114 115 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 116 117 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) 118 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) 119 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 120 121 /* wbuf.c */ 122 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); 123 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 124 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 125 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 126 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 127 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 128 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 129 void jffs2_wbuf_timeout(unsigned long data); 130 void jffs2_wbuf_process(void *data); 131 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 132 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 133 int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 134 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 135 136 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC)) 137 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c); 138 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c); 139 140 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 141 int jffs2_dataflash_setup(struct jffs2_sb_info *c); 142 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 143 144 #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS)) 145 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); 146 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); 147 148 #endif /* WRITEBUFFER */ 149 150 /* erase.c */ 151 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) 152 { 153 OFNI_BS_2SFFJ(c)->s_dirt = 1; 154 } 155 156 /* background.c */ 157 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 158 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 159 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 160 161 /* dir.c */ 162 extern const struct file_operations jffs2_dir_operations; 163 extern struct inode_operations jffs2_dir_inode_operations; 164 165 /* file.c */ 166 extern const struct file_operations jffs2_file_operations; 167 extern struct inode_operations jffs2_file_inode_operations; 168 extern struct address_space_operations jffs2_file_address_operations; 169 int jffs2_fsync(struct file *, struct dentry *, int); 170 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 171 172 /* ioctl.c */ 173 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); 174 175 /* symlink.c */ 176 extern struct inode_operations jffs2_symlink_inode_operations; 177 178 /* fs.c */ 179 int jffs2_setattr (struct dentry *, struct iattr *); 180 void jffs2_read_inode (struct inode *); 181 void jffs2_clear_inode (struct inode *); 182 void jffs2_dirty_inode(struct inode *inode); 183 struct inode *jffs2_new_inode (struct inode *dir_i, int mode, 184 struct jffs2_raw_inode *ri); 185 int jffs2_statfs (struct super_block *, struct kstatfs *); 186 void jffs2_write_super (struct super_block *); 187 int jffs2_remount_fs (struct super_block *, int *, char *); 188 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 189 void jffs2_gc_release_inode(struct jffs2_sb_info *c, 190 struct jffs2_inode_info *f); 191 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 192 int inum, int nlink); 193 194 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 195 struct jffs2_inode_info *f, 196 unsigned long offset, 197 unsigned long *priv); 198 void jffs2_gc_release_page(struct jffs2_sb_info *c, 199 unsigned char *pg, 200 unsigned long *priv); 201 void jffs2_flash_cleanup(struct jffs2_sb_info *c); 202 203 204 /* writev.c */ 205 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 206 unsigned long count, loff_t to, size_t *retlen); 207 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 208 size_t *retlen, const u_char *buf); 209 210 #endif /* __JFFS2_OS_LINUX_H__ */ 211 212 213