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Diffstat (limited to 'fs/jffs2/os-linux.h')
| -rw-r--r-- | fs/jffs2/os-linux.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h new file mode 100644 index 000000000..921d78258 --- /dev/null +++ b/fs/jffs2/os-linux.h @@ -0,0 +1,197 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright © 2001-2007 Red Hat, Inc. + * + * Created by David Woodhouse <dwmw2@infradead.org> + * + * For licensing information, see the file 'LICENCE' in this directory. + * + */ + +#ifndef __JFFS2_OS_LINUX_H__ +#define __JFFS2_OS_LINUX_H__ + +/* JFFS2 uses Linux mode bits natively -- no need for conversion */ +#define os_to_jffs2_mode(x) (x) +#define jffs2_to_os_mode(x) (x) + +struct kstatfs; +struct kvec; + +#define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode)) +#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) +#define JFFS2_SB_INFO(sb) (sb->s_fs_info) +#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) + + +#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) +#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) +#define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f))) +#define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f))) +#define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev) + +#define JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX)) +#define ITIME(sec) ((struct timespec64){sec, 0}) +#define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds()) +#define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec) +#define JFFS2_F_I_CTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_ctime) +#define JFFS2_F_I_MTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_mtime) +#define JFFS2_F_I_ATIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_atime) +#define sleep_on_spinunlock(wq, s) \ + do { \ + DECLARE_WAITQUEUE(__wait, current); \ + add_wait_queue((wq), &__wait); \ + set_current_state(TASK_UNINTERRUPTIBLE); \ + spin_unlock(s); \ + schedule(); \ + remove_wait_queue((wq), &__wait); \ + } while(0) + +static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) +{ + f->highest_version = 0; + f->fragtree = RB_ROOT; + f->metadata = NULL; + f->dents = NULL; + f->target = NULL; + f->flags = 0; + f->usercompr = 0; +} + + +#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY) + +#define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) +#ifndef CONFIG_JFFS2_FS_WRITEBUFFER + + +#ifdef CONFIG_JFFS2_SUMMARY +#define jffs2_can_mark_obsolete(c) (0) +#else +#define jffs2_can_mark_obsolete(c) (1) +#endif + +#define jffs2_is_writebuffered(c) (0) +#define jffs2_cleanmarker_oob(c) (0) +#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) + +#define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) +#define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf)) +#define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) +#define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) +#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) +#define jffs2_nand_flash_setup(c) (0) +#define jffs2_nand_flash_cleanup(c) do {} while(0) +#define jffs2_wbuf_dirty(c) (0) +#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) +#define jffs2_wbuf_timeout NULL +#define jffs2_wbuf_process NULL +#define jffs2_dataflash(c) (0) +#define jffs2_dataflash_setup(c) (0) +#define jffs2_dataflash_cleanup(c) do {} while (0) +#define jffs2_nor_wbuf_flash(c) (0) +#define jffs2_nor_wbuf_flash_setup(c) (0) +#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) +#define jffs2_ubivol(c) (0) +#define jffs2_ubivol_setup(c) (0) +#define jffs2_ubivol_cleanup(c) do {} while (0) +#define jffs2_dirty_trigger(c) do {} while (0) + +#else /* NAND and/or ECC'd NOR support present */ + +#define jffs2_is_writebuffered(c) (c->wbuf != NULL) + +#ifdef CONFIG_JFFS2_SUMMARY +#define jffs2_can_mark_obsolete(c) (0) +#else +#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) +#endif + +#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) + +#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) + +/* wbuf.c */ +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); +int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); +int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); +int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); +int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); +int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); +int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); +void jffs2_wbuf_timeout(unsigned long data); +void jffs2_wbuf_process(void *data); +int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); +int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); +int jffs2_nand_flash_setup(struct jffs2_sb_info *c); +void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); + +#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) +int jffs2_dataflash_setup(struct jffs2_sb_info *c); +void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); +#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) +int jffs2_ubivol_setup(struct jffs2_sb_info *c); +void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); + +#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) +int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); +void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); +void jffs2_dirty_trigger(struct jffs2_sb_info *c); + +#endif /* WRITEBUFFER */ + +/* background.c */ +int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); +void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); +void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); + +/* dir.c */ +extern const struct file_operations jffs2_dir_operations; +extern const struct inode_operations jffs2_dir_inode_operations; + +/* file.c */ +extern const struct file_operations jffs2_file_operations; +extern const struct inode_operations jffs2_file_inode_operations; +extern const struct address_space_operations jffs2_file_address_operations; +int jffs2_fsync(struct file *, loff_t, loff_t, int); +int __jffs2_read_folio(struct file *file, struct folio *folio); + +/* ioctl.c */ +long jffs2_ioctl(struct file *, unsigned int, unsigned long); + +/* symlink.c */ +extern const struct inode_operations jffs2_symlink_inode_operations; + +/* fs.c */ +int jffs2_setattr (struct user_namespace *, struct dentry *, struct iattr *); +int jffs2_do_setattr (struct inode *, struct iattr *); +struct inode *jffs2_iget(struct super_block *, unsigned long); +void jffs2_evict_inode (struct inode *); +void jffs2_dirty_inode(struct inode *inode, int flags); +struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, + struct jffs2_raw_inode *ri); +int jffs2_statfs (struct dentry *, struct kstatfs *); +int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc); +int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc); +void jffs2_gc_release_inode(struct jffs2_sb_info *c, + struct jffs2_inode_info *f); +struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, + int inum, int unlinked); + +unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, + struct jffs2_inode_info *f, + unsigned long offset, + unsigned long *priv); +void jffs2_flash_cleanup(struct jffs2_sb_info *c); + + +/* writev.c */ +int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, + unsigned long count, loff_t to, size_t *retlen); +int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, + size_t *retlen, const u_char *buf); + +#endif /* __JFFS2_OS_LINUX_H__ */ + + |