Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
| 3 | * |
David Woodhouse | c00c310 | 2007-04-25 14:16:47 +0100 | [diff] [blame] | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Created by David Woodhouse <dwmw2@infradead.org> |
| 7 | * |
| 8 | * For licensing information, see the file 'LICENCE' in this directory. |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #ifndef __JFFS2_OS_LINUX_H__ |
| 13 | #define __JFFS2_OS_LINUX_H__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | /* JFFS2 uses Linux mode bits natively -- no need for conversion */ |
| 16 | #define os_to_jffs2_mode(x) (x) |
| 17 | #define jffs2_to_os_mode(x) (x) |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | struct kstatfs; |
| 20 | struct kvec; |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode)) |
| 23 | #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) |
| 24 | #define JFFS2_SB_INFO(sb) (sb->s_fs_info) |
| 25 | #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | |
| 28 | #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) |
| 29 | #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) |
| 30 | #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) |
| 31 | #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) |
David Woodhouse | aef9ab4 | 2006-05-19 00:28:49 +0100 | [diff] [blame] | 32 | #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #define ITIME(sec) ((struct timespec){sec, 0}) |
| 35 | #define I_SEC(tv) ((tv).tv_sec) |
| 36 | #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) |
| 37 | #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) |
| 38 | #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #define sleep_on_spinunlock(wq, s) \ |
| 41 | do { \ |
| 42 | DECLARE_WAITQUEUE(__wait, current); \ |
| 43 | add_wait_queue((wq), &__wait); \ |
| 44 | set_current_state(TASK_UNINTERRUPTIBLE); \ |
| 45 | spin_unlock(s); \ |
| 46 | schedule(); \ |
| 47 | remove_wait_queue((wq), &__wait); \ |
| 48 | } while(0) |
| 49 | |
| 50 | static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) |
| 51 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | f->highest_version = 0; |
| 53 | f->fragtree = RB_ROOT; |
| 54 | f->metadata = NULL; |
| 55 | f->dents = NULL; |
Artem B. Bityutskiy | 2b79adc | 2005-07-17 12:13:51 +0100 | [diff] [blame] | 56 | f->target = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | f->flags = 0; |
| 58 | f->usercompr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 64 | #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 65 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 66 | |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 67 | |
| 68 | #ifdef CONFIG_JFFS2_SUMMARY |
| 69 | #define jffs2_can_mark_obsolete(c) (0) |
| 70 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #define jffs2_can_mark_obsolete(c) (1) |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 72 | #endif |
| 73 | |
Artem B. Bityuckiy | 8cd7921 | 2005-05-03 16:19:02 +0100 | [diff] [blame] | 74 | #define jffs2_is_writebuffered(c) (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #define jffs2_cleanmarker_oob(c) (0) |
| 76 | #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) |
| 77 | |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 78 | #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf)) |
Artem B. Bityutskiy | 733802d | 2005-09-22 12:25:00 +0100 | [diff] [blame] | 80 | #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) |
| 81 | #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) |
| 83 | #define jffs2_nand_flash_setup(c) (0) |
| 84 | #define jffs2_nand_flash_cleanup(c) do {} while(0) |
| 85 | #define jffs2_wbuf_dirty(c) (0) |
| 86 | #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) |
| 87 | #define jffs2_wbuf_timeout NULL |
| 88 | #define jffs2_wbuf_process NULL |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 89 | #define jffs2_dataflash(c) (0) |
Todd Poynor | 751382d | 2005-07-12 03:34:39 +0100 | [diff] [blame] | 90 | #define jffs2_dataflash_setup(c) (0) |
| 91 | #define jffs2_dataflash_cleanup(c) do {} while (0) |
David Woodhouse | 9bfeb69 | 2006-05-26 21:19:05 +0100 | [diff] [blame] | 92 | #define jffs2_nor_wbuf_flash(c) (0) |
Nicolas Pitre | 59da721 | 2005-08-06 05:51:33 +0100 | [diff] [blame] | 93 | #define jffs2_nor_wbuf_flash_setup(c) (0) |
| 94 | #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) |
Artem Bityutskiy | 0029da3 | 2006-10-04 19:15:21 +0300 | [diff] [blame] | 95 | #define jffs2_ubivol(c) (0) |
| 96 | #define jffs2_ubivol_setup(c) (0) |
| 97 | #define jffs2_ubivol_cleanup(c) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | #else /* NAND and/or ECC'd NOR support present */ |
| 100 | |
Artem B. Bityuckiy | 8cd7921 | 2005-05-03 16:19:02 +0100 | [diff] [blame] | 101 | #define jffs2_is_writebuffered(c) (c->wbuf != NULL) |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 102 | |
| 103 | #ifdef CONFIG_JFFS2_SUMMARY |
| 104 | #define jffs2_can_mark_obsolete(c) (0) |
| 105 | #else |
Joern Engel | 5fa4339 | 2006-05-22 23:18:29 +0200 | [diff] [blame] | 106 | #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 107 | #endif |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) |
| 110 | |
| 111 | #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) |
| 112 | #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) |
| 113 | #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) |
| 114 | |
| 115 | /* wbuf.c */ |
| 116 | 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); |
| 117 | int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); |
| 118 | int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); |
| 119 | int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); |
| 120 | int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
| 121 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
| 122 | int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); |
| 123 | void jffs2_wbuf_timeout(unsigned long data); |
| 124 | void jffs2_wbuf_process(void *data); |
| 125 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); |
| 126 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); |
| 127 | int jffs2_nand_flash_setup(struct jffs2_sb_info *c); |
| 128 | void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 129 | |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 130 | #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) |
| 131 | int jffs2_dataflash_setup(struct jffs2_sb_info *c); |
| 132 | void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); |
Artem Bityutskiy | 0029da3 | 2006-10-04 19:15:21 +0300 | [diff] [blame] | 133 | #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) |
| 134 | int jffs2_ubivol_setup(struct jffs2_sb_info *c); |
| 135 | void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 136 | |
Joern Engel | 5fa4339 | 2006-05-22 23:18:29 +0200 | [diff] [blame] | 137 | #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) |
Nicolas Pitre | 59da721 | 2005-08-06 05:51:33 +0100 | [diff] [blame] | 138 | int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); |
| 139 | void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); |
| 140 | |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 141 | #endif /* WRITEBUFFER */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Joakim Tjernlund | 64a5c2e | 2010-05-19 17:13:19 +0100 | [diff] [blame] | 143 | static inline void jffs2_dirty_trigger(struct jffs2_sb_info *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
| 145 | OFNI_BS_2SFFJ(c)->s_dirt = 1; |
| 146 | } |
| 147 | |
| 148 | /* background.c */ |
| 149 | int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); |
| 150 | void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); |
| 151 | void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); |
| 152 | |
| 153 | /* dir.c */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 154 | extern const struct file_operations jffs2_dir_operations; |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 155 | extern const struct inode_operations jffs2_dir_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
| 157 | /* file.c */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 158 | extern const struct file_operations jffs2_file_operations; |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 159 | extern const struct inode_operations jffs2_file_inode_operations; |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 160 | extern const struct address_space_operations jffs2_file_address_operations; |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 161 | int jffs2_fsync(struct file *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); |
| 163 | |
| 164 | /* ioctl.c */ |
Stoyan Gaydarov | 0533400 | 2008-07-07 07:45:59 -0500 | [diff] [blame] | 165 | long jffs2_ioctl(struct file *, unsigned int, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | /* symlink.c */ |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 168 | extern const struct inode_operations jffs2_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* fs.c */ |
| 171 | int jffs2_setattr (struct dentry *, struct iattr *); |
David Woodhouse | 9ed437c | 2007-08-22 12:39:19 +0100 | [diff] [blame] | 172 | int jffs2_do_setattr (struct inode *, struct iattr *); |
David Howells | 5451f79 | 2008-02-07 00:15:42 -0800 | [diff] [blame] | 173 | struct inode *jffs2_iget(struct super_block *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | void jffs2_clear_inode (struct inode *); |
| 175 | void jffs2_dirty_inode(struct inode *inode); |
| 176 | struct inode *jffs2_new_inode (struct inode *dir_i, int mode, |
KaiGai Kohei | cfc8dc6 | 2007-09-14 15:16:35 +0900 | [diff] [blame] | 177 | struct jffs2_raw_inode *ri); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 178 | int jffs2_statfs (struct dentry *, struct kstatfs *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | int jffs2_remount_fs (struct super_block *, int *, char *); |
| 180 | int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); |
| 181 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, |
| 182 | struct jffs2_inode_info *f); |
| 183 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, |
David Woodhouse | 1b690b4 | 2008-05-01 16:59:24 +0100 | [diff] [blame] | 184 | int inum, int unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 186 | unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, |
| 187 | struct jffs2_inode_info *f, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | unsigned long offset, |
| 189 | unsigned long *priv); |
| 190 | void jffs2_gc_release_page(struct jffs2_sb_info *c, |
| 191 | unsigned char *pg, |
| 192 | unsigned long *priv); |
| 193 | void jffs2_flash_cleanup(struct jffs2_sb_info *c); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | /* writev.c */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 197 | int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | unsigned long count, loff_t to, size_t *retlen); |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 199 | int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, |
| 200 | size_t *retlen, const u_char *buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | #endif /* __JFFS2_OS_LINUX_H__ */ |
| 203 | |
| 204 | |