1 /* 2 * JFFS2 -- Journalling Flash File System, Version 2. 3 * 4 * Copyright © 2001-2007 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 */ 11 12 #ifndef __JFFS2_OS_LINUX_H__ 13 #define __JFFS2_OS_LINUX_H__ 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 19 struct kstatfs; 20 struct kvec; 21 22 #define JFFS2_INODE_INFO(i) (container_of(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) 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) (i_uid_read(OFNI_EDONI_2SFFJ(f))) 31 #define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f))) 32 #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev) 33 34 #define JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX)) 35 #define ITIME(sec) ((struct timespec64){sec, 0}) 36 #define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds()) 37 #define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec) 38 #define JFFS2_F_I_CTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_ctime) 39 #define JFFS2_F_I_MTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_mtime) 40 #define JFFS2_F_I_ATIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_atime) 41 #define sleep_on_spinunlock(wq, s) \ 42 do { \ 43 DECLARE_WAITQUEUE(__wait, current); \ 44 add_wait_queue((wq), &__wait); \ 45 set_current_state(TASK_UNINTERRUPTIBLE); \ 46 spin_unlock(s); \ 47 schedule(); \ 48 remove_wait_queue((wq), &__wait); \ 49 } while(0) 50 51 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) 52 { 53 f->highest_version = 0; 54 f->fragtree = RB_ROOT; 55 f->metadata = NULL; 56 f->dents = NULL; 57 f->target = NULL; 58 f->flags = 0; 59 f->usercompr = 0; 60 } 61 62 63 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY) 64 65 #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) 66 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER 67 68 69 #ifdef CONFIG_JFFS2_SUMMARY 70 #define jffs2_can_mark_obsolete(c) (0) 71 #else 72 #define jffs2_can_mark_obsolete(c) (1) 73 #endif 74 75 #define jffs2_is_writebuffered(c) (0) 76 #define jffs2_cleanmarker_oob(c) (0) 77 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 78 79 #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) 80 #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf)) 81 #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) 82 #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) 83 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 84 #define jffs2_nand_flash_setup(c) (0) 85 #define jffs2_nand_flash_cleanup(c) do {} while(0) 86 #define jffs2_wbuf_dirty(c) (0) 87 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 88 #define jffs2_wbuf_timeout NULL 89 #define jffs2_wbuf_process NULL 90 #define jffs2_dataflash(c) (0) 91 #define jffs2_dataflash_setup(c) (0) 92 #define jffs2_dataflash_cleanup(c) do {} while (0) 93 #define jffs2_nor_wbuf_flash(c) (0) 94 #define jffs2_nor_wbuf_flash_setup(c) (0) 95 #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) 96 #define jffs2_ubivol(c) (0) 97 #define jffs2_ubivol_setup(c) (0) 98 #define jffs2_ubivol_cleanup(c) do {} while (0) 99 #define jffs2_dirty_trigger(c) do {} while (0) 100 101 #else /* NAND and/or ECC'd NOR support present */ 102 103 #define jffs2_is_writebuffered(c) (c->wbuf != NULL) 104 105 #ifdef CONFIG_JFFS2_SUMMARY 106 #define jffs2_can_mark_obsolete(c) (0) 107 #else 108 #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) 109 #endif 110 111 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 112 113 #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); 129 130 #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); 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); 136 137 #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) 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 void jffs2_dirty_trigger(struct jffs2_sb_info *c); 141 142 #endif /* WRITEBUFFER */ 143 144 /* background.c */ 145 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 146 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 147 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 148 149 /* dir.c */ 150 extern const struct file_operations jffs2_dir_operations; 151 extern const struct inode_operations jffs2_dir_inode_operations; 152 153 /* file.c */ 154 extern const struct file_operations jffs2_file_operations; 155 extern const struct inode_operations jffs2_file_inode_operations; 156 extern const struct address_space_operations jffs2_file_address_operations; 157 int jffs2_fsync(struct file *, loff_t, loff_t, int); 158 int __jffs2_read_folio(struct file *file, struct folio *folio); 159 160 /* ioctl.c */ 161 long jffs2_ioctl(struct file *, unsigned int, unsigned long); 162 163 /* symlink.c */ 164 extern const struct inode_operations jffs2_symlink_inode_operations; 165 166 /* fs.c */ 167 int jffs2_setattr (struct user_namespace *, struct dentry *, struct iattr *); 168 int jffs2_do_setattr (struct inode *, struct iattr *); 169 struct inode *jffs2_iget(struct super_block *, unsigned long); 170 void jffs2_evict_inode (struct inode *); 171 void jffs2_dirty_inode(struct inode *inode, int flags); 172 struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, 173 struct jffs2_raw_inode *ri); 174 int jffs2_statfs (struct dentry *, struct kstatfs *); 175 int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc); 176 int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc); 177 void jffs2_gc_release_inode(struct jffs2_sb_info *c, 178 struct jffs2_inode_info *f); 179 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 180 int inum, int unlinked); 181 182 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 183 struct jffs2_inode_info *f, 184 unsigned long offset, 185 unsigned long *priv); 186 void jffs2_flash_cleanup(struct jffs2_sb_info *c); 187 188 189 /* writev.c */ 190 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 191 unsigned long count, loff_t to, size_t *retlen); 192 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 193 size_t *retlen, const u_char *buf); 194 195 #endif /* __JFFS2_OS_LINUX_H__ */ 196 197 198