Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 10 | * $Id: os-linux.h,v 1.54 2005/02/09 09:23:53 pavlov Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 102 | #define jffs2_is_writebuffered(c) (c->wbuf != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 104 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
| 105 | #define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 122 | #define jffs2_dataflash(c) (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 128 | #define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 154 | |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 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); |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 158 | |
| 159 | #endif /* WRITEBUFFER */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |