RTEMS: cpukit/libfs/src/jffs2/src/os-rtems.h Source File

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os-rtems.h
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright © 2002-2003 Free Software Foundation, Inc.
5 * Copyright © 2013 embedded brains GmbH <rtems@embedded-brains.de>
6 *
7 * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
8 *
9 * Port to the RTEMS by embedded brains GmbH.
10 *
11 * For licensing information, see the file 'LICENCE' in this directory.
12 *
13 * $Id: os-ecos.h,v 1.24 2005/02/09 09:23:55 pavlov Exp $
14 *
15 */
16
17#ifndef __JFFS2_OS_RTEMS_H__
18#define __JFFS2_OS_RTEMS_H__
19
20#include <asm/atomic.h>
21#include <asm/bug.h>
22#include <linux/compiler.h>
23#include <linux/list.h>
24#include <linux/pagemap.h>
25#include <linux/stat.h>
26#include <linux/types.h>
27#include <sys/uio.h>
28#include <dirent.h>
29#include <errno.h>
30#include <fcntl.h>
31#include <string.h>
32#include <time.h>
33
34#include <rtems/jffs2.h>
35#include <rtems/thread.h>
36
37#define CONFIG_JFFS2_RTIME
38
39#define CONFIG_JFFS2_ZLIB
40
41struct _inode;
42struct super_block;
43
44static inline unsigned int full_name_hash(const void *salt, const unsigned char * name, size_t len) {
45
46 uint32_t hash = 0;
47 (void)salt;
48 while (len--) {
49 hash = (hash << 4) | (hash >> 28);
50 hash ^= *(name++);
51 }
52 return hash;
53}
54
55/* NAND flash not currently supported on RTEMS */
56#define jffs2_can_mark_obsolete(c) (1)
57
58#define JFFS2_INODE_INFO(i) (&(i)->jffs2_i)
59#define OFNI_EDONI_2SFFJ(f) ((struct _inode *) ( ((char *)f) - ((char *)(&((struct _inode *)NULL)->jffs2_i)) ) )
60
61#define ITIME(sec) (sec)
62#define I_SEC(tv) (tv)
63
64#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
65#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
66#define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
67#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
68#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime)
69#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime)
70#define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime)
71
72#define get_seconds() time(NULL)
73
74 struct _inode {
75 cyg_uint32 i_ino;
76
77 int i_count;
78 mode_t i_mode;
79 nlink_t i_nlink; // Could we dispense with this?
80 uid_t i_uid;
81 gid_t i_gid;
82 time_t i_atime;
83 time_t i_mtime;
84 time_t i_ctime;
85// union {
86 unsigned short i_rdev; // For devices only
87 struct _inode * i_parent; // For directories only
88 off_t i_size; // For files only
89// };
90 struct super_block * i_sb;
91 struct jffs2_full_dirent * i_fd;
92
93 struct jffs2_inode_info jffs2_i;
94
95 struct _inode * i_cache_prev; // We need doubly-linked?
96 struct _inode * i_cache_next;
97};
98
99#define JFFS2_SB_INFO(sb) (&(sb)->jffs2_sb)
100#define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->jffs2_sb)) ) )
101
102 struct super_block {
103 struct jffs2_sb_info jffs2_sb;
104 struct _inode * s_root;
105 rtems_jffs2_flash_control *s_flash_control;
106 rtems_jffs2_compressor_control *s_compressor_control;
107 bool s_is_readonly;
108 unsigned char s_gc_buffer[PAGE_CACHE_SIZE]; // Avoids malloc when user may be under memory pressure
109 rtems_recursive_mutex s_mutex;
110 char s_name_buf[JFFS2_MAX_NAME_LEN];
111};
112
113#define sleep_on_spinunlock(wq, sl) spin_unlock(sl)
114#define EBADFD 32767
115
116static inline bool jffs2_is_readonly(struct jffs2_sb_info *c)
117{
118 struct super_block *sb = OFNI_BS_2SFFJ(c);
119
120 return sb->s_is_readonly;
121}
122
123static inline void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c)
124{
125 const struct super_block *sb = OFNI_BS_2SFFJ(c);
126 rtems_jffs2_flash_control *fc = sb->s_flash_control;
127
128 if (fc->trigger_garbage_collection != NULL) {
129 (*fc->trigger_garbage_collection)(fc);
130 }
131}
132
133/* fs-rtems.c */
134struct _inode *jffs2_new_inode (struct _inode *dir_i, int mode, struct jffs2_raw_inode *ri);
135struct _inode *jffs2_iget(struct super_block *sb, cyg_uint32 ino);
136void jffs2_iput(struct _inode * i);
137void jffs2_gc_release_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
138struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, int inum, int nlink);
139unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
140 unsigned long offset, unsigned long *priv);
141void jffs2_gc_release_page(struct jffs2_sb_info *c, unsigned char *pg, unsigned long *priv);
142
143/* Avoid polluting RTEMS namespace with names not starting in jffs2_ */
144#define os_to_jffs2_mode(x) jffs2_from_os_mode(x)
145static inline uint32_t jffs2_from_os_mode(uint32_t osmode)
146{
147 return osmode & (S_IFMT | S_IRWXU | S_IRWXG | S_IRWXO);
148}
149
150static inline uint32_t jffs2_to_os_mode (uint32_t jmode)
151{
152 return jmode & (S_IFMT | S_IRWXU | S_IRWXG | S_IRWXO);
153}
154
155
156/* flashio.c */
157int jffs2_flash_read(struct jffs2_sb_info *c, cyg_uint32 read_buffer_offset,
158 const size_t size, size_t * return_size, unsigned char * write_buffer);
159int jffs2_flash_write(struct jffs2_sb_info *c, cyg_uint32 write_buffer_offset,
160 const size_t size, size_t * return_size, unsigned char * read_buffer);
161int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs,
162 unsigned long count, loff_t to, size_t *retlen);
163int jffs2_flash_erase(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
164
165// dir-rtems.c
166struct _inode *jffs2_lookup(struct _inode *dir_i, const unsigned char *name, size_t namelen);
167int jffs2_create(struct _inode *dir_i, const char *d_name, size_t d_namelen, int mode);
168int jffs2_mknod(struct _inode *dir_i, const unsigned char *d_name, size_t d_namelen, int mode, const unsigned char *data, size_t datalen);
169int jffs2_link (struct _inode *old_d_inode, struct _inode *dir_i, const unsigned char *d_name, size_t d_namelen);
170int jffs2_unlink(struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name, size_t d_namelen);
171int jffs2_rmdir (struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name, size_t d_namelen);
172int jffs2_rename (struct _inode *old_dir_i, struct _inode *d_inode, const unsigned char *old_d_name, size_t old_d_namelen,
173 struct _inode *new_dir_i, const unsigned char *new_d_name, size_t new_d_namelen);
174
175/* erase.c */
176static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
177{ }
178
179#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
180#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
181#define jffs2_can_mark_obsolete(c) (1)
182#define jffs2_is_writebuffered(c) (0)
183#define jffs2_cleanmarker_oob(c) (0)
184#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
185
186#define jffs2_flush_wbuf_pad(c) (c=c)
187#define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
188#define jffs2_nand_read_failcnt(c,jeb) do { ; } while(0)
189#define jffs2_write_nand_badblock(c,jeb,p) (0)
190#define jffs2_flash_setup(c) (0)
191#define jffs2_nand_flash_cleanup(c) do {} while(0)
192#define jffs2_wbuf_dirty(c) (0)
193#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
194#define jffs2_wbuf_timeout NULL
195#define jffs2_wbuf_process NULL
196#define jffs2_nor_ecc(c) (0)
197#else
198#error no nand yet
199#endif
200
201#ifndef BUG_ON
202#define BUG_ON(x) do { if (unlikely(x)) BUG(); } while(0)
203#endif
204
205#define __init
206
207#endif /* __JFFS2_OS_RTEMS_H__ */
NULL
#define NULL
Requests a GPIO pin group configuration.
Definition: bestcomm_api.h:77
_inode
Definition: os-rtems.h:74
jffs2_eraseblock
Definition: nodelist.h:278
jffs2_full_dirent
Definition: nodelist.h:252
jffs2_inode_info
Definition: jffs2_fs_i.h:20
jffs2_raw_inode
Definition: jffs2.h:138
jffs2_sb_info
Definition: jffs2_fs_sb.h:48
rtems_jffs2_compressor_control
JFFS2 compressor control.
Definition: jffs2.h:367
rtems_jffs2_flash_control
JFFS2 flash device control.
Definition: jffs2.h:249
rtems_jffs2_flash_control::trigger_garbage_collection
rtems_jffs2_trigger_garbage_collection trigger_garbage_collection
Trigger garbage collection operation.
Definition: jffs2.h:300
super_block
Definition: os-rtems.h:102