3 * Library for filesystems writers.
6 #include <linux/module.h>
7 #include <linux/pagemap.h>
8 #include <linux/slab.h>
9 #include <linux/mount.h>
10 #include <linux/vfs.h>
11 #include <linux/mutex.h>
12 #include <linux/exportfs.h>
13 #include <linux/writeback.h>
14 #include <linux/buffer_head.h>
16 #include <asm/uaccess.h>
18 int simple_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
21 struct inode
*inode
= dentry
->d_inode
;
22 generic_fillattr(inode
, stat
);
23 stat
->blocks
= inode
->i_mapping
->nrpages
<< (PAGE_CACHE_SHIFT
- 9);
27 int simple_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
29 buf
->f_type
= dentry
->d_sb
->s_magic
;
30 buf
->f_bsize
= PAGE_CACHE_SIZE
;
31 buf
->f_namelen
= NAME_MAX
;
36 * Retaining negative dentries for an in-memory filesystem just wastes
37 * memory and lookup time: arrange for them to be deleted immediately.
39 static int simple_delete_dentry(struct dentry
*dentry
)
45 * Lookup the data. This is trivial - if the dentry didn't already
46 * exist, we know it is negative. Set d_op to delete negative dentries.
48 struct dentry
*simple_lookup(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
50 static const struct dentry_operations simple_dentry_operations
= {
51 .d_delete
= simple_delete_dentry
,
54 if (dentry
->d_name
.len
> NAME_MAX
)
55 return ERR_PTR(-ENAMETOOLONG
);
56 dentry
->d_op
= &simple_dentry_operations
;
61 int dcache_dir_open(struct inode
*inode
, struct file
*file
)
63 static struct qstr cursor_name
= {.len
= 1, .name
= "."};
65 file
->private_data
= d_alloc(file
->f_path
.dentry
, &cursor_name
);
67 return file
->private_data
? 0 : -ENOMEM
;
70 int dcache_dir_close(struct inode
*inode
, struct file
*file
)
72 dput(file
->private_data
);
76 loff_t
dcache_dir_lseek(struct file
*file
, loff_t offset
, int origin
)
78 mutex_lock(&file
->f_path
.dentry
->d_inode
->i_mutex
);
81 offset
+= file
->f_pos
;
86 mutex_unlock(&file
->f_path
.dentry
->d_inode
->i_mutex
);
89 if (offset
!= file
->f_pos
) {
91 if (file
->f_pos
>= 2) {
93 struct dentry
*cursor
= file
->private_data
;
94 loff_t n
= file
->f_pos
- 2;
96 spin_lock(&dcache_lock
);
97 list_del(&cursor
->d_u
.d_child
);
98 p
= file
->f_path
.dentry
->d_subdirs
.next
;
99 while (n
&& p
!= &file
->f_path
.dentry
->d_subdirs
) {
101 next
= list_entry(p
, struct dentry
, d_u
.d_child
);
102 if (!d_unhashed(next
) && next
->d_inode
)
106 list_add_tail(&cursor
->d_u
.d_child
, p
);
107 spin_unlock(&dcache_lock
);
110 mutex_unlock(&file
->f_path
.dentry
->d_inode
->i_mutex
);
114 /* Relationship between i_mode and the DT_xxx types */
115 static inline unsigned char dt_type(struct inode
*inode
)
117 return (inode
->i_mode
>> 12) & 15;
121 * Directory is locked and all positive dentries in it are safe, since
122 * for ramfs-type trees they can't go away without unlink() or rmdir(),
123 * both impossible due to the lock on directory.
126 int dcache_readdir(struct file
* filp
, void * dirent
, filldir_t filldir
)
128 struct dentry
*dentry
= filp
->f_path
.dentry
;
129 struct dentry
*cursor
= filp
->private_data
;
130 struct list_head
*p
, *q
= &cursor
->d_u
.d_child
;
136 ino
= dentry
->d_inode
->i_ino
;
137 if (filldir(dirent
, ".", 1, i
, ino
, DT_DIR
) < 0)
143 ino
= parent_ino(dentry
);
144 if (filldir(dirent
, "..", 2, i
, ino
, DT_DIR
) < 0)
150 spin_lock(&dcache_lock
);
151 if (filp
->f_pos
== 2)
152 list_move(q
, &dentry
->d_subdirs
);
154 for (p
=q
->next
; p
!= &dentry
->d_subdirs
; p
=p
->next
) {
156 next
= list_entry(p
, struct dentry
, d_u
.d_child
);
157 if (d_unhashed(next
) || !next
->d_inode
)
160 spin_unlock(&dcache_lock
);
161 if (filldir(dirent
, next
->d_name
.name
,
162 next
->d_name
.len
, filp
->f_pos
,
163 next
->d_inode
->i_ino
,
164 dt_type(next
->d_inode
)) < 0)
166 spin_lock(&dcache_lock
);
167 /* next is still alive */
172 spin_unlock(&dcache_lock
);
177 ssize_t
generic_read_dir(struct file
*filp
, char __user
*buf
, size_t siz
, loff_t
*ppos
)
182 const struct file_operations simple_dir_operations
= {
183 .open
= dcache_dir_open
,
184 .release
= dcache_dir_close
,
185 .llseek
= dcache_dir_lseek
,
186 .read
= generic_read_dir
,
187 .readdir
= dcache_readdir
,
191 const struct inode_operations simple_dir_inode_operations
= {
192 .lookup
= simple_lookup
,
195 static const struct super_operations simple_super_operations
= {
196 .statfs
= simple_statfs
,
200 * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
201 * will never be mountable)
203 int get_sb_pseudo(struct file_system_type
*fs_type
, char *name
,
204 const struct super_operations
*ops
, unsigned long magic
,
205 struct vfsmount
*mnt
)
207 struct super_block
*s
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
208 struct dentry
*dentry
;
210 struct qstr d_name
= {.name
= name
, .len
= strlen(name
)};
215 s
->s_flags
= MS_NOUSER
;
216 s
->s_maxbytes
= MAX_LFS_FILESIZE
;
217 s
->s_blocksize
= PAGE_SIZE
;
218 s
->s_blocksize_bits
= PAGE_SHIFT
;
220 s
->s_op
= ops
? ops
: &simple_super_operations
;
226 * since this is the first inode, make it number 1. New inodes created
227 * after this must take care not to collide with it (by passing
228 * max_reserved of 1 to iunique).
231 root
->i_mode
= S_IFDIR
| S_IRUSR
| S_IWUSR
;
232 root
->i_atime
= root
->i_mtime
= root
->i_ctime
= CURRENT_TIME
;
233 dentry
= d_alloc(NULL
, &d_name
);
239 dentry
->d_parent
= dentry
;
240 d_instantiate(dentry
, root
);
242 s
->s_flags
|= MS_ACTIVE
;
243 simple_set_mnt(mnt
, s
);
247 deactivate_locked_super(s
);
251 int simple_link(struct dentry
*old_dentry
, struct inode
*dir
, struct dentry
*dentry
)
253 struct inode
*inode
= old_dentry
->d_inode
;
255 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
257 atomic_inc(&inode
->i_count
);
259 d_instantiate(dentry
, inode
);
263 static inline int simple_positive(struct dentry
*dentry
)
265 return dentry
->d_inode
&& !d_unhashed(dentry
);
268 int simple_empty(struct dentry
*dentry
)
270 struct dentry
*child
;
273 spin_lock(&dcache_lock
);
274 list_for_each_entry(child
, &dentry
->d_subdirs
, d_u
.d_child
)
275 if (simple_positive(child
))
279 spin_unlock(&dcache_lock
);
283 int simple_unlink(struct inode
*dir
, struct dentry
*dentry
)
285 struct inode
*inode
= dentry
->d_inode
;
287 inode
->i_ctime
= dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
293 int simple_rmdir(struct inode
*dir
, struct dentry
*dentry
)
295 if (!simple_empty(dentry
))
298 drop_nlink(dentry
->d_inode
);
299 simple_unlink(dir
, dentry
);
304 int simple_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
305 struct inode
*new_dir
, struct dentry
*new_dentry
)
307 struct inode
*inode
= old_dentry
->d_inode
;
308 int they_are_dirs
= S_ISDIR(old_dentry
->d_inode
->i_mode
);
310 if (!simple_empty(new_dentry
))
313 if (new_dentry
->d_inode
) {
314 simple_unlink(new_dir
, new_dentry
);
317 } else if (they_are_dirs
) {
322 old_dir
->i_ctime
= old_dir
->i_mtime
= new_dir
->i_ctime
=
323 new_dir
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
328 int simple_readpage(struct file
*file
, struct page
*page
)
330 clear_highpage(page
);
331 flush_dcache_page(page
);
332 SetPageUptodate(page
);
337 int simple_write_begin(struct file
*file
, struct address_space
*mapping
,
338 loff_t pos
, unsigned len
, unsigned flags
,
339 struct page
**pagep
, void **fsdata
)
344 index
= pos
>> PAGE_CACHE_SHIFT
;
346 page
= grab_cache_page_write_begin(mapping
, index
, flags
);
352 if (!PageUptodate(page
) && (len
!= PAGE_CACHE_SIZE
)) {
353 unsigned from
= pos
& (PAGE_CACHE_SIZE
- 1);
355 zero_user_segments(page
, 0, from
, from
+ len
, PAGE_CACHE_SIZE
);
361 * simple_write_end - .write_end helper for non-block-device FSes
362 * @available: See .write_end of address_space_operations
371 * simple_write_end does the minimum needed for updating a page after writing is
372 * done. It has the same API signature as the .write_end of
373 * address_space_operations vector. So it can just be set onto .write_end for
374 * FSes that don't need any other processing. i_mutex is assumed to be held.
375 * Block based filesystems should use generic_write_end().
376 * NOTE: Even though i_size might get updated by this function, mark_inode_dirty
377 * is not called, so a filesystem that actually does store data in .write_inode
378 * should extend on what's done here with a call to mark_inode_dirty() in the
379 * case that i_size has changed.
381 int simple_write_end(struct file
*file
, struct address_space
*mapping
,
382 loff_t pos
, unsigned len
, unsigned copied
,
383 struct page
*page
, void *fsdata
)
385 struct inode
*inode
= page
->mapping
->host
;
386 loff_t last_pos
= pos
+ copied
;
388 /* zero the stale part of the page if we did a short copy */
390 unsigned from
= pos
& (PAGE_CACHE_SIZE
- 1);
392 zero_user(page
, from
+ copied
, len
- copied
);
395 if (!PageUptodate(page
))
396 SetPageUptodate(page
);
398 * No need to use i_size_read() here, the i_size
399 * cannot change under us because we hold the i_mutex.
401 if (last_pos
> inode
->i_size
)
402 i_size_write(inode
, last_pos
);
404 set_page_dirty(page
);
406 page_cache_release(page
);
412 * the inodes created here are not hashed. If you use iunique to generate
413 * unique inode values later for this filesystem, then you must take care
414 * to pass it an appropriate max_reserved value to avoid collisions.
416 int simple_fill_super(struct super_block
*s
, int magic
, struct tree_descr
*files
)
420 struct dentry
*dentry
;
423 s
->s_blocksize
= PAGE_CACHE_SIZE
;
424 s
->s_blocksize_bits
= PAGE_CACHE_SHIFT
;
426 s
->s_op
= &simple_super_operations
;
429 inode
= new_inode(s
);
433 * because the root inode is 1, the files array must not contain an
437 inode
->i_mode
= S_IFDIR
| 0755;
438 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
439 inode
->i_op
= &simple_dir_inode_operations
;
440 inode
->i_fop
= &simple_dir_operations
;
442 root
= d_alloc_root(inode
);
447 for (i
= 0; !files
->name
|| files
->name
[0]; i
++, files
++) {
451 /* warn if it tries to conflict with the root inode */
452 if (unlikely(i
== 1))
453 printk(KERN_WARNING
"%s: %s passed in a files array"
454 "with an index of 1!\n", __func__
,
457 dentry
= d_alloc_name(root
, files
->name
);
460 inode
= new_inode(s
);
463 inode
->i_mode
= S_IFREG
| files
->mode
;
464 inode
->i_atime
= inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
465 inode
->i_fop
= files
->ops
;
467 d_add(dentry
, inode
);
477 static DEFINE_SPINLOCK(pin_fs_lock
);
479 int simple_pin_fs(struct file_system_type
*type
, struct vfsmount
**mount
, int *count
)
481 struct vfsmount
*mnt
= NULL
;
482 spin_lock(&pin_fs_lock
);
483 if (unlikely(!*mount
)) {
484 spin_unlock(&pin_fs_lock
);
485 mnt
= vfs_kern_mount(type
, 0, type
->name
, NULL
);
488 spin_lock(&pin_fs_lock
);
494 spin_unlock(&pin_fs_lock
);
499 void simple_release_fs(struct vfsmount
**mount
, int *count
)
501 struct vfsmount
*mnt
;
502 spin_lock(&pin_fs_lock
);
506 spin_unlock(&pin_fs_lock
);
511 * simple_read_from_buffer - copy data from the buffer to user space
512 * @to: the user space buffer to read to
513 * @count: the maximum number of bytes to read
514 * @ppos: the current position in the buffer
515 * @from: the buffer to read from
516 * @available: the size of the buffer
518 * The simple_read_from_buffer() function reads up to @count bytes from the
519 * buffer @from at offset @ppos into the user space address starting at @to.
521 * On success, the number of bytes read is returned and the offset @ppos is
522 * advanced by this number, or negative value is returned on error.
524 ssize_t
simple_read_from_buffer(void __user
*to
, size_t count
, loff_t
*ppos
,
525 const void *from
, size_t available
)
532 if (pos
>= available
|| !count
)
534 if (count
> available
- pos
)
535 count
= available
- pos
;
536 ret
= copy_to_user(to
, from
+ pos
, count
);
545 * simple_write_to_buffer - copy data from user space to the buffer
546 * @to: the buffer to write to
547 * @available: the size of the buffer
548 * @ppos: the current position in the buffer
549 * @from: the user space buffer to read from
550 * @count: the maximum number of bytes to read
552 * The simple_write_to_buffer() function reads up to @count bytes from the user
553 * space address starting at @from into the buffer @to at offset @ppos.
555 * On success, the number of bytes written is returned and the offset @ppos is
556 * advanced by this number, or negative value is returned on error.
558 ssize_t
simple_write_to_buffer(void *to
, size_t available
, loff_t
*ppos
,
559 const void __user
*from
, size_t count
)
566 if (pos
>= available
|| !count
)
568 if (count
> available
- pos
)
569 count
= available
- pos
;
570 res
= copy_from_user(to
+ pos
, from
, count
);
579 * memory_read_from_buffer - copy data from the buffer
580 * @to: the kernel space buffer to read to
581 * @count: the maximum number of bytes to read
582 * @ppos: the current position in the buffer
583 * @from: the buffer to read from
584 * @available: the size of the buffer
586 * The memory_read_from_buffer() function reads up to @count bytes from the
587 * buffer @from at offset @ppos into the kernel space address starting at @to.
589 * On success, the number of bytes read is returned and the offset @ppos is
590 * advanced by this number, or negative value is returned on error.
592 ssize_t
memory_read_from_buffer(void *to
, size_t count
, loff_t
*ppos
,
593 const void *from
, size_t available
)
599 if (pos
>= available
)
601 if (count
> available
- pos
)
602 count
= available
- pos
;
603 memcpy(to
, from
+ pos
, count
);
610 * Transaction based IO.
611 * The file expects a single write which triggers the transaction, and then
612 * possibly a read which collects the result - which is stored in a
616 void simple_transaction_set(struct file
*file
, size_t n
)
618 struct simple_transaction_argresp
*ar
= file
->private_data
;
620 BUG_ON(n
> SIMPLE_TRANSACTION_LIMIT
);
623 * The barrier ensures that ar->size will really remain zero until
624 * ar->data is ready for reading.
630 char *simple_transaction_get(struct file
*file
, const char __user
*buf
, size_t size
)
632 struct simple_transaction_argresp
*ar
;
633 static DEFINE_SPINLOCK(simple_transaction_lock
);
635 if (size
> SIMPLE_TRANSACTION_LIMIT
- 1)
636 return ERR_PTR(-EFBIG
);
638 ar
= (struct simple_transaction_argresp
*)get_zeroed_page(GFP_KERNEL
);
640 return ERR_PTR(-ENOMEM
);
642 spin_lock(&simple_transaction_lock
);
644 /* only one write allowed per open */
645 if (file
->private_data
) {
646 spin_unlock(&simple_transaction_lock
);
647 free_page((unsigned long)ar
);
648 return ERR_PTR(-EBUSY
);
651 file
->private_data
= ar
;
653 spin_unlock(&simple_transaction_lock
);
655 if (copy_from_user(ar
->data
, buf
, size
))
656 return ERR_PTR(-EFAULT
);
661 ssize_t
simple_transaction_read(struct file
*file
, char __user
*buf
, size_t size
, loff_t
*pos
)
663 struct simple_transaction_argresp
*ar
= file
->private_data
;
667 return simple_read_from_buffer(buf
, size
, pos
, ar
->data
, ar
->size
);
670 int simple_transaction_release(struct inode
*inode
, struct file
*file
)
672 free_page((unsigned long)file
->private_data
);
676 /* Simple attribute files */
679 int (*get
)(void *, u64
*);
680 int (*set
)(void *, u64
);
681 char get_buf
[24]; /* enough to store a u64 and "\n\0" */
684 const char *fmt
; /* format for read operation */
685 struct mutex mutex
; /* protects access to these buffers */
688 /* simple_attr_open is called by an actual attribute open file operation
689 * to set the attribute specific access operations. */
690 int simple_attr_open(struct inode
*inode
, struct file
*file
,
691 int (*get
)(void *, u64
*), int (*set
)(void *, u64
),
694 struct simple_attr
*attr
;
696 attr
= kmalloc(sizeof(*attr
), GFP_KERNEL
);
702 attr
->data
= inode
->i_private
;
704 mutex_init(&attr
->mutex
);
706 file
->private_data
= attr
;
708 return nonseekable_open(inode
, file
);
711 int simple_attr_release(struct inode
*inode
, struct file
*file
)
713 kfree(file
->private_data
);
717 /* read from the buffer that is filled with the get function */
718 ssize_t
simple_attr_read(struct file
*file
, char __user
*buf
,
719 size_t len
, loff_t
*ppos
)
721 struct simple_attr
*attr
;
725 attr
= file
->private_data
;
730 ret
= mutex_lock_interruptible(&attr
->mutex
);
734 if (*ppos
) { /* continued read */
735 size
= strlen(attr
->get_buf
);
736 } else { /* first read */
738 ret
= attr
->get(attr
->data
, &val
);
742 size
= scnprintf(attr
->get_buf
, sizeof(attr
->get_buf
),
743 attr
->fmt
, (unsigned long long)val
);
746 ret
= simple_read_from_buffer(buf
, len
, ppos
, attr
->get_buf
, size
);
748 mutex_unlock(&attr
->mutex
);
752 /* interpret the buffer as a number to call the set function with */
753 ssize_t
simple_attr_write(struct file
*file
, const char __user
*buf
,
754 size_t len
, loff_t
*ppos
)
756 struct simple_attr
*attr
;
761 attr
= file
->private_data
;
765 ret
= mutex_lock_interruptible(&attr
->mutex
);
770 size
= min(sizeof(attr
->set_buf
) - 1, len
);
771 if (copy_from_user(attr
->set_buf
, buf
, size
))
774 attr
->set_buf
[size
] = '\0';
775 val
= simple_strtol(attr
->set_buf
, NULL
, 0);
776 ret
= attr
->set(attr
->data
, val
);
778 ret
= len
; /* on success, claim we got the whole input */
780 mutex_unlock(&attr
->mutex
);
785 * generic_fh_to_dentry - generic helper for the fh_to_dentry export operation
786 * @sb: filesystem to do the file handle conversion on
787 * @fid: file handle to convert
788 * @fh_len: length of the file handle in bytes
789 * @fh_type: type of file handle
790 * @get_inode: filesystem callback to retrieve inode
792 * This function decodes @fid as long as it has one of the well-known
793 * Linux filehandle types and calls @get_inode on it to retrieve the
794 * inode for the object specified in the file handle.
796 struct dentry
*generic_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
797 int fh_len
, int fh_type
, struct inode
*(*get_inode
)
798 (struct super_block
*sb
, u64 ino
, u32 gen
))
800 struct inode
*inode
= NULL
;
806 case FILEID_INO32_GEN
:
807 case FILEID_INO32_GEN_PARENT
:
808 inode
= get_inode(sb
, fid
->i32
.ino
, fid
->i32
.gen
);
812 return d_obtain_alias(inode
);
814 EXPORT_SYMBOL_GPL(generic_fh_to_dentry
);
817 * generic_fh_to_dentry - generic helper for the fh_to_parent export operation
818 * @sb: filesystem to do the file handle conversion on
819 * @fid: file handle to convert
820 * @fh_len: length of the file handle in bytes
821 * @fh_type: type of file handle
822 * @get_inode: filesystem callback to retrieve inode
824 * This function decodes @fid as long as it has one of the well-known
825 * Linux filehandle types and calls @get_inode on it to retrieve the
826 * inode for the _parent_ object specified in the file handle if it
827 * is specified in the file handle, or NULL otherwise.
829 struct dentry
*generic_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
830 int fh_len
, int fh_type
, struct inode
*(*get_inode
)
831 (struct super_block
*sb
, u64 ino
, u32 gen
))
833 struct inode
*inode
= NULL
;
839 case FILEID_INO32_GEN_PARENT
:
840 inode
= get_inode(sb
, fid
->i32
.parent_ino
,
841 (fh_len
> 3 ? fid
->i32
.parent_gen
: 0));
845 return d_obtain_alias(inode
);
847 EXPORT_SYMBOL_GPL(generic_fh_to_parent
);
850 * generic_file_fsync - generic fsync implementation for simple filesystems
851 * @file: file to synchronize
852 * @datasync: only synchronize essential metadata if true
854 * This is a generic implementation of the fsync method for simple
855 * filesystems which track all non-inode metadata in the buffers list
856 * hanging off the address_space structure.
858 int generic_file_fsync(struct file
*file
, int datasync
)
860 struct writeback_control wbc
= {
861 .sync_mode
= WB_SYNC_ALL
,
862 .nr_to_write
= 0, /* metadata-only; caller takes care of data */
864 struct inode
*inode
= file
->f_mapping
->host
;
868 ret
= sync_mapping_buffers(inode
->i_mapping
);
869 if (!(inode
->i_state
& I_DIRTY
))
871 if (datasync
&& !(inode
->i_state
& I_DIRTY_DATASYNC
))
874 err
= sync_inode(inode
, &wbc
);
879 EXPORT_SYMBOL(generic_file_fsync
);
882 * No-op implementation of ->fsync for in-memory filesystems.
884 int noop_fsync(struct file
*file
, int datasync
)
889 EXPORT_SYMBOL(dcache_dir_close
);
890 EXPORT_SYMBOL(dcache_dir_lseek
);
891 EXPORT_SYMBOL(dcache_dir_open
);
892 EXPORT_SYMBOL(dcache_readdir
);
893 EXPORT_SYMBOL(generic_read_dir
);
894 EXPORT_SYMBOL(get_sb_pseudo
);
895 EXPORT_SYMBOL(simple_write_begin
);
896 EXPORT_SYMBOL(simple_write_end
);
897 EXPORT_SYMBOL(simple_dir_inode_operations
);
898 EXPORT_SYMBOL(simple_dir_operations
);
899 EXPORT_SYMBOL(simple_empty
);
900 EXPORT_SYMBOL(simple_fill_super
);
901 EXPORT_SYMBOL(simple_getattr
);
902 EXPORT_SYMBOL(simple_link
);
903 EXPORT_SYMBOL(simple_lookup
);
904 EXPORT_SYMBOL(simple_pin_fs
);
905 EXPORT_SYMBOL(simple_readpage
);
906 EXPORT_SYMBOL(simple_release_fs
);
907 EXPORT_SYMBOL(simple_rename
);
908 EXPORT_SYMBOL(simple_rmdir
);
909 EXPORT_SYMBOL(simple_statfs
);
910 EXPORT_SYMBOL(noop_fsync
);
911 EXPORT_SYMBOL(simple_unlink
);
912 EXPORT_SYMBOL(simple_read_from_buffer
);
913 EXPORT_SYMBOL(simple_write_to_buffer
);
914 EXPORT_SYMBOL(memory_read_from_buffer
);
915 EXPORT_SYMBOL(simple_transaction_set
);
916 EXPORT_SYMBOL(simple_transaction_get
);
917 EXPORT_SYMBOL(simple_transaction_read
);
918 EXPORT_SYMBOL(simple_transaction_release
);
919 EXPORT_SYMBOL_GPL(simple_attr_open
);
920 EXPORT_SYMBOL_GPL(simple_attr_release
);
921 EXPORT_SYMBOL_GPL(simple_attr_read
);
922 EXPORT_SYMBOL_GPL(simple_attr_write
);