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TOMOYO Linux Cross Reference
Linux/fs/jffs2/os-linux.h

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  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_do_readpage_unlock(void *data, struct page *pg);
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 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 

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