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/quotaops.h>
12 #include <linux/mutex.h>
13 #include <linux/exportfs.h>
14 #include <linux/writeback.h>
15 #include <linux/buffer_head.h>
17 #include <asm/uaccess.h>
19 static inline int simple_positive(struct dentry *dentry)
21 return dentry->d_inode && !d_unhashed(dentry);
24 int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
27 struct inode *inode = dentry->d_inode;
28 generic_fillattr(inode, stat);
29 stat->blocks = inode->i_mapping->nrpages << (PAGE_CACHE_SHIFT - 9);
33 int simple_statfs(struct dentry *dentry, struct kstatfs *buf)
35 buf->f_type = dentry->d_sb->s_magic;
36 buf->f_bsize = PAGE_CACHE_SIZE;
37 buf->f_namelen = NAME_MAX;
42 * Retaining negative dentries for an in-memory filesystem just wastes
43 * memory and lookup time: arrange for them to be deleted immediately.
45 static int simple_delete_dentry(const struct dentry *dentry)
51 * Lookup the data. This is trivial - if the dentry didn't already
52 * exist, we know it is negative. Set d_op to delete negative dentries.
54 struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
56 static const struct dentry_operations simple_dentry_operations = {
57 .d_delete = simple_delete_dentry,
60 if (dentry->d_name.len > NAME_MAX)
61 return ERR_PTR(-ENAMETOOLONG);
62 dentry->d_op = &simple_dentry_operations;
67 int dcache_dir_open(struct inode *inode, struct file *file)
69 static struct qstr cursor_name = {.len = 1, .name = "."};
71 file->private_data = d_alloc(file->f_path.dentry, &cursor_name);
73 return file->private_data ? 0 : -ENOMEM;
76 int dcache_dir_close(struct inode *inode, struct file *file)
78 dput(file->private_data);
82 loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
84 struct dentry *dentry = file->f_path.dentry;
85 mutex_lock(&dentry->d_inode->i_mutex);
88 offset += file->f_pos;
93 mutex_unlock(&dentry->d_inode->i_mutex);
96 if (offset != file->f_pos) {
98 if (file->f_pos >= 2) {
100 struct dentry *cursor = file->private_data;
101 loff_t n = file->f_pos - 2;
103 spin_lock(&dcache_lock);
104 spin_lock(&dentry->d_lock);
105 /* d_lock not required for cursor */
106 list_del(&cursor->d_u.d_child);
107 p = dentry->d_subdirs.next;
108 while (n && p != &dentry->d_subdirs) {
110 next = list_entry(p, struct dentry, d_u.d_child);
111 spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
112 if (simple_positive(next))
114 spin_unlock(&next->d_lock);
117 list_add_tail(&cursor->d_u.d_child, p);
118 spin_unlock(&dentry->d_lock);
119 spin_unlock(&dcache_lock);
122 mutex_unlock(&dentry->d_inode->i_mutex);
126 /* Relationship between i_mode and the DT_xxx types */
127 static inline unsigned char dt_type(struct inode *inode)
129 return (inode->i_mode >> 12) & 15;
133 * Directory is locked and all positive dentries in it are safe, since
134 * for ramfs-type trees they can't go away without unlink() or rmdir(),
135 * both impossible due to the lock on directory.
138 int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
140 struct dentry *dentry = filp->f_path.dentry;
141 struct dentry *cursor = filp->private_data;
142 struct list_head *p, *q = &cursor->d_u.d_child;
148 ino = dentry->d_inode->i_ino;
149 if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
155 ino = parent_ino(dentry);
156 if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
162 spin_lock(&dcache_lock);
163 spin_lock(&dentry->d_lock);
164 if (filp->f_pos == 2)
165 list_move(q, &dentry->d_subdirs);
167 for (p=q->next; p != &dentry->d_subdirs; p=p->next) {
169 next = list_entry(p, struct dentry, d_u.d_child);
170 spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
171 if (!simple_positive(next)) {
172 spin_unlock(&next->d_lock);
176 spin_unlock(&next->d_lock);
177 spin_unlock(&dentry->d_lock);
178 spin_unlock(&dcache_lock);
179 if (filldir(dirent, next->d_name.name,
180 next->d_name.len, filp->f_pos,
181 next->d_inode->i_ino,
182 dt_type(next->d_inode)) < 0)
184 spin_lock(&dcache_lock);
185 spin_lock(&dentry->d_lock);
186 spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
187 /* next is still alive */
189 spin_unlock(&next->d_lock);
193 spin_unlock(&dentry->d_lock);
194 spin_unlock(&dcache_lock);
199 ssize_t generic_read_dir(struct file *filp, char __user *buf, size_t siz, loff_t *ppos)
204 const struct file_operations simple_dir_operations = {
205 .open = dcache_dir_open,
206 .release = dcache_dir_close,
207 .llseek = dcache_dir_lseek,
208 .read = generic_read_dir,
209 .readdir = dcache_readdir,
213 const struct inode_operations simple_dir_inode_operations = {
214 .lookup = simple_lookup,
217 static const struct super_operations simple_super_operations = {
218 .statfs = simple_statfs,
222 * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
223 * will never be mountable)
225 struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
226 const struct super_operations *ops, unsigned long magic)
228 struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
229 struct dentry *dentry;
231 struct qstr d_name = {.name = name, .len = strlen(name)};
236 s->s_flags = MS_NOUSER;
237 s->s_maxbytes = MAX_LFS_FILESIZE;
238 s->s_blocksize = PAGE_SIZE;
239 s->s_blocksize_bits = PAGE_SHIFT;
241 s->s_op = ops ? ops : &simple_super_operations;
247 * since this is the first inode, make it number 1. New inodes created
248 * after this must take care not to collide with it (by passing
249 * max_reserved of 1 to iunique).
252 root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
253 root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
254 dentry = d_alloc(NULL, &d_name);
260 dentry->d_parent = dentry;
261 d_instantiate(dentry, root);
263 s->s_flags |= MS_ACTIVE;
264 return dget(s->s_root);
267 deactivate_locked_super(s);
268 return ERR_PTR(-ENOMEM);
271 int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
273 struct inode *inode = old_dentry->d_inode;
275 inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
279 d_instantiate(dentry, inode);
283 int simple_empty(struct dentry *dentry)
285 struct dentry *child;
288 spin_lock(&dcache_lock);
289 spin_lock(&dentry->d_lock);
290 list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) {
291 spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
292 if (simple_positive(child)) {
293 spin_unlock(&child->d_lock);
296 spin_unlock(&child->d_lock);
300 spin_unlock(&dentry->d_lock);
301 spin_unlock(&dcache_lock);
305 int simple_unlink(struct inode *dir, struct dentry *dentry)
307 struct inode *inode = dentry->d_inode;
309 inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
315 int simple_rmdir(struct inode *dir, struct dentry *dentry)
317 if (!simple_empty(dentry))
320 drop_nlink(dentry->d_inode);
321 simple_unlink(dir, dentry);
326 int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
327 struct inode *new_dir, struct dentry *new_dentry)
329 struct inode *inode = old_dentry->d_inode;
330 int they_are_dirs = S_ISDIR(old_dentry->d_inode->i_mode);
332 if (!simple_empty(new_dentry))
335 if (new_dentry->d_inode) {
336 simple_unlink(new_dir, new_dentry);
339 } else if (they_are_dirs) {
344 old_dir->i_ctime = old_dir->i_mtime = new_dir->i_ctime =
345 new_dir->i_mtime = inode->i_ctime = CURRENT_TIME;
351 * simple_setattr - setattr for simple filesystem
353 * @iattr: iattr structure
355 * Returns 0 on success, -error on failure.
357 * simple_setattr is a simple ->setattr implementation without a proper
358 * implementation of size changes.
360 * It can either be used for in-memory filesystems or special files
361 * on simple regular filesystems. Anything that needs to change on-disk
362 * or wire state on size changes needs its own setattr method.
364 int simple_setattr(struct dentry *dentry, struct iattr *iattr)
366 struct inode *inode = dentry->d_inode;
369 WARN_ON_ONCE(inode->i_op->truncate);
371 error = inode_change_ok(inode, iattr);
375 if (iattr->ia_valid & ATTR_SIZE)
376 truncate_setsize(inode, iattr->ia_size);
377 setattr_copy(inode, iattr);
378 mark_inode_dirty(inode);
381 EXPORT_SYMBOL(simple_setattr);
383 int simple_readpage(struct file *file, struct page *page)
385 clear_highpage(page);
386 flush_dcache_page(page);
387 SetPageUptodate(page);
392 int simple_write_begin(struct file *file, struct address_space *mapping,
393 loff_t pos, unsigned len, unsigned flags,
394 struct page **pagep, void **fsdata)
399 index = pos >> PAGE_CACHE_SHIFT;
401 page = grab_cache_page_write_begin(mapping, index, flags);
407 if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
408 unsigned from = pos & (PAGE_CACHE_SIZE - 1);
410 zero_user_segments(page, 0, from, from + len, PAGE_CACHE_SIZE);
416 * simple_write_end - .write_end helper for non-block-device FSes
417 * @available: See .write_end of address_space_operations
426 * simple_write_end does the minimum needed for updating a page after writing is
427 * done. It has the same API signature as the .write_end of
428 * address_space_operations vector. So it can just be set onto .write_end for
429 * FSes that don't need any other processing. i_mutex is assumed to be held.
430 * Block based filesystems should use generic_write_end().
431 * NOTE: Even though i_size might get updated by this function, mark_inode_dirty
432 * is not called, so a filesystem that actually does store data in .write_inode
433 * should extend on what's done here with a call to mark_inode_dirty() in the
434 * case that i_size has changed.
436 int simple_write_end(struct file *file, struct address_space *mapping,
437 loff_t pos, unsigned len, unsigned copied,
438 struct page *page, void *fsdata)
440 struct inode *inode = page->mapping->host;
441 loff_t last_pos = pos + copied;
443 /* zero the stale part of the page if we did a short copy */
445 unsigned from = pos & (PAGE_CACHE_SIZE - 1);
447 zero_user(page, from + copied, len - copied);
450 if (!PageUptodate(page))
451 SetPageUptodate(page);
453 * No need to use i_size_read() here, the i_size
454 * cannot change under us because we hold the i_mutex.
456 if (last_pos > inode->i_size)
457 i_size_write(inode, last_pos);
459 set_page_dirty(page);
461 page_cache_release(page);
467 * the inodes created here are not hashed. If you use iunique to generate
468 * unique inode values later for this filesystem, then you must take care
469 * to pass it an appropriate max_reserved value to avoid collisions.
471 int simple_fill_super(struct super_block *s, unsigned long magic,
472 struct tree_descr *files)
476 struct dentry *dentry;
479 s->s_blocksize = PAGE_CACHE_SIZE;
480 s->s_blocksize_bits = PAGE_CACHE_SHIFT;
482 s->s_op = &simple_super_operations;
485 inode = new_inode(s);
489 * because the root inode is 1, the files array must not contain an
493 inode->i_mode = S_IFDIR | 0755;
494 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
495 inode->i_op = &simple_dir_inode_operations;
496 inode->i_fop = &simple_dir_operations;
498 root = d_alloc_root(inode);
503 for (i = 0; !files->name || files->name[0]; i++, files++) {
507 /* warn if it tries to conflict with the root inode */
508 if (unlikely(i == 1))
509 printk(KERN_WARNING "%s: %s passed in a files array"
510 "with an index of 1!\n", __func__,
513 dentry = d_alloc_name(root, files->name);
516 inode = new_inode(s);
519 inode->i_mode = S_IFREG | files->mode;
520 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
521 inode->i_fop = files->ops;
523 d_add(dentry, inode);
533 static DEFINE_SPINLOCK(pin_fs_lock);
535 int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
537 struct vfsmount *mnt = NULL;
538 spin_lock(&pin_fs_lock);
539 if (unlikely(!*mount)) {
540 spin_unlock(&pin_fs_lock);
541 mnt = vfs_kern_mount(type, 0, type->name, NULL);
544 spin_lock(&pin_fs_lock);
550 spin_unlock(&pin_fs_lock);
555 void simple_release_fs(struct vfsmount **mount, int *count)
557 struct vfsmount *mnt;
558 spin_lock(&pin_fs_lock);
562 spin_unlock(&pin_fs_lock);
567 * simple_read_from_buffer - copy data from the buffer to user space
568 * @to: the user space buffer to read to
569 * @count: the maximum number of bytes to read
570 * @ppos: the current position in the buffer
571 * @from: the buffer to read from
572 * @available: the size of the buffer
574 * The simple_read_from_buffer() function reads up to @count bytes from the
575 * buffer @from at offset @ppos into the user space address starting at @to.
577 * On success, the number of bytes read is returned and the offset @ppos is
578 * advanced by this number, or negative value is returned on error.
580 ssize_t simple_read_from_buffer(void __user *to, size_t count, loff_t *ppos,
581 const void *from, size_t available)
588 if (pos >= available || !count)
590 if (count > available - pos)
591 count = available - pos;
592 ret = copy_to_user(to, from + pos, count);
601 * simple_write_to_buffer - copy data from user space to the buffer
602 * @to: the buffer to write to
603 * @available: the size of the buffer
604 * @ppos: the current position in the buffer
605 * @from: the user space buffer to read from
606 * @count: the maximum number of bytes to read
608 * The simple_write_to_buffer() function reads up to @count bytes from the user
609 * space address starting at @from into the buffer @to at offset @ppos.
611 * On success, the number of bytes written is returned and the offset @ppos is
612 * advanced by this number, or negative value is returned on error.
614 ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos,
615 const void __user *from, size_t count)
622 if (pos >= available || !count)
624 if (count > available - pos)
625 count = available - pos;
626 res = copy_from_user(to + pos, from, count);
635 * memory_read_from_buffer - copy data from the buffer
636 * @to: the kernel space buffer to read to
637 * @count: the maximum number of bytes to read
638 * @ppos: the current position in the buffer
639 * @from: the buffer to read from
640 * @available: the size of the buffer
642 * The memory_read_from_buffer() function reads up to @count bytes from the
643 * buffer @from at offset @ppos into the kernel space address starting at @to.
645 * On success, the number of bytes read is returned and the offset @ppos is
646 * advanced by this number, or negative value is returned on error.
648 ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
649 const void *from, size_t available)
655 if (pos >= available)
657 if (count > available - pos)
658 count = available - pos;
659 memcpy(to, from + pos, count);
666 * Transaction based IO.
667 * The file expects a single write which triggers the transaction, and then
668 * possibly a read which collects the result - which is stored in a
672 void simple_transaction_set(struct file *file, size_t n)
674 struct simple_transaction_argresp *ar = file->private_data;
676 BUG_ON(n > SIMPLE_TRANSACTION_LIMIT);
679 * The barrier ensures that ar->size will really remain zero until
680 * ar->data is ready for reading.
686 char *simple_transaction_get(struct file *file, const char __user *buf, size_t size)
688 struct simple_transaction_argresp *ar;
689 static DEFINE_SPINLOCK(simple_transaction_lock);
691 if (size > SIMPLE_TRANSACTION_LIMIT - 1)
692 return ERR_PTR(-EFBIG);
694 ar = (struct simple_transaction_argresp *)get_zeroed_page(GFP_KERNEL);
696 return ERR_PTR(-ENOMEM);
698 spin_lock(&simple_transaction_lock);
700 /* only one write allowed per open */
701 if (file->private_data) {
702 spin_unlock(&simple_transaction_lock);
703 free_page((unsigned long)ar);
704 return ERR_PTR(-EBUSY);
707 file->private_data = ar;
709 spin_unlock(&simple_transaction_lock);
711 if (copy_from_user(ar->data, buf, size))
712 return ERR_PTR(-EFAULT);
717 ssize_t simple_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
719 struct simple_transaction_argresp *ar = file->private_data;
723 return simple_read_from_buffer(buf, size, pos, ar->data, ar->size);
726 int simple_transaction_release(struct inode *inode, struct file *file)
728 free_page((unsigned long)file->private_data);
732 /* Simple attribute files */
735 int (*get)(void *, u64 *);
736 int (*set)(void *, u64);
737 char get_buf[24]; /* enough to store a u64 and "\n\0" */
740 const char *fmt; /* format for read operation */
741 struct mutex mutex; /* protects access to these buffers */
744 /* simple_attr_open is called by an actual attribute open file operation
745 * to set the attribute specific access operations. */
746 int simple_attr_open(struct inode *inode, struct file *file,
747 int (*get)(void *, u64 *), int (*set)(void *, u64),
750 struct simple_attr *attr;
752 attr = kmalloc(sizeof(*attr), GFP_KERNEL);
758 attr->data = inode->i_private;
760 mutex_init(&attr->mutex);
762 file->private_data = attr;
764 return nonseekable_open(inode, file);
767 int simple_attr_release(struct inode *inode, struct file *file)
769 kfree(file->private_data);
773 /* read from the buffer that is filled with the get function */
774 ssize_t simple_attr_read(struct file *file, char __user *buf,
775 size_t len, loff_t *ppos)
777 struct simple_attr *attr;
781 attr = file->private_data;
786 ret = mutex_lock_interruptible(&attr->mutex);
790 if (*ppos) { /* continued read */
791 size = strlen(attr->get_buf);
792 } else { /* first read */
794 ret = attr->get(attr->data, &val);
798 size = scnprintf(attr->get_buf, sizeof(attr->get_buf),
799 attr->fmt, (unsigned long long)val);
802 ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
804 mutex_unlock(&attr->mutex);
808 /* interpret the buffer as a number to call the set function with */
809 ssize_t simple_attr_write(struct file *file, const char __user *buf,
810 size_t len, loff_t *ppos)
812 struct simple_attr *attr;
817 attr = file->private_data;
821 ret = mutex_lock_interruptible(&attr->mutex);
826 size = min(sizeof(attr->set_buf) - 1, len);
827 if (copy_from_user(attr->set_buf, buf, size))
830 attr->set_buf[size] = '\0';
831 val = simple_strtol(attr->set_buf, NULL, 0);
832 ret = attr->set(attr->data, val);
834 ret = len; /* on success, claim we got the whole input */
836 mutex_unlock(&attr->mutex);
841 * generic_fh_to_dentry - generic helper for the fh_to_dentry export operation
842 * @sb: filesystem to do the file handle conversion on
843 * @fid: file handle to convert
844 * @fh_len: length of the file handle in bytes
845 * @fh_type: type of file handle
846 * @get_inode: filesystem callback to retrieve inode
848 * This function decodes @fid as long as it has one of the well-known
849 * Linux filehandle types and calls @get_inode on it to retrieve the
850 * inode for the object specified in the file handle.
852 struct dentry *generic_fh_to_dentry(struct super_block *sb, struct fid *fid,
853 int fh_len, int fh_type, struct inode *(*get_inode)
854 (struct super_block *sb, u64 ino, u32 gen))
856 struct inode *inode = NULL;
862 case FILEID_INO32_GEN:
863 case FILEID_INO32_GEN_PARENT:
864 inode = get_inode(sb, fid->i32.ino, fid->i32.gen);
868 return d_obtain_alias(inode);
870 EXPORT_SYMBOL_GPL(generic_fh_to_dentry);
873 * generic_fh_to_dentry - generic helper for the fh_to_parent export operation
874 * @sb: filesystem to do the file handle conversion on
875 * @fid: file handle to convert
876 * @fh_len: length of the file handle in bytes
877 * @fh_type: type of file handle
878 * @get_inode: filesystem callback to retrieve inode
880 * This function decodes @fid as long as it has one of the well-known
881 * Linux filehandle types and calls @get_inode on it to retrieve the
882 * inode for the _parent_ object specified in the file handle if it
883 * is specified in the file handle, or NULL otherwise.
885 struct dentry *generic_fh_to_parent(struct super_block *sb, struct fid *fid,
886 int fh_len, int fh_type, struct inode *(*get_inode)
887 (struct super_block *sb, u64 ino, u32 gen))
889 struct inode *inode = NULL;
895 case FILEID_INO32_GEN_PARENT:
896 inode = get_inode(sb, fid->i32.parent_ino,
897 (fh_len > 3 ? fid->i32.parent_gen : 0));
901 return d_obtain_alias(inode);
903 EXPORT_SYMBOL_GPL(generic_fh_to_parent);
906 * generic_file_fsync - generic fsync implementation for simple filesystems
907 * @file: file to synchronize
908 * @datasync: only synchronize essential metadata if true
910 * This is a generic implementation of the fsync method for simple
911 * filesystems which track all non-inode metadata in the buffers list
912 * hanging off the address_space structure.
914 int generic_file_fsync(struct file *file, int datasync)
916 struct inode *inode = file->f_mapping->host;
920 ret = sync_mapping_buffers(inode->i_mapping);
921 if (!(inode->i_state & I_DIRTY))
923 if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
926 err = sync_inode_metadata(inode, 1);
931 EXPORT_SYMBOL(generic_file_fsync);
934 * generic_check_addressable - Check addressability of file system
935 * @blocksize_bits: log of file system block size
936 * @num_blocks: number of blocks in file system
938 * Determine whether a file system with @num_blocks blocks (and a
939 * block size of 2**@blocksize_bits) is addressable by the sector_t
940 * and page cache of the system. Return 0 if so and -EFBIG otherwise.
942 int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks)
944 u64 last_fs_block = num_blocks - 1;
946 last_fs_block >> (PAGE_CACHE_SHIFT - blocksize_bits);
948 if (unlikely(num_blocks == 0))
951 if ((blocksize_bits < 9) || (blocksize_bits > PAGE_CACHE_SHIFT))
954 if ((last_fs_block > (sector_t)(~0ULL) >> (blocksize_bits - 9)) ||
955 (last_fs_page > (pgoff_t)(~0ULL))) {
960 EXPORT_SYMBOL(generic_check_addressable);
963 * No-op implementation of ->fsync for in-memory filesystems.
965 int noop_fsync(struct file *file, int datasync)
970 EXPORT_SYMBOL(dcache_dir_close);
971 EXPORT_SYMBOL(dcache_dir_lseek);
972 EXPORT_SYMBOL(dcache_dir_open);
973 EXPORT_SYMBOL(dcache_readdir);
974 EXPORT_SYMBOL(generic_read_dir);
975 EXPORT_SYMBOL(mount_pseudo);
976 EXPORT_SYMBOL(simple_write_begin);
977 EXPORT_SYMBOL(simple_write_end);
978 EXPORT_SYMBOL(simple_dir_inode_operations);
979 EXPORT_SYMBOL(simple_dir_operations);
980 EXPORT_SYMBOL(simple_empty);
981 EXPORT_SYMBOL(simple_fill_super);
982 EXPORT_SYMBOL(simple_getattr);
983 EXPORT_SYMBOL(simple_link);
984 EXPORT_SYMBOL(simple_lookup);
985 EXPORT_SYMBOL(simple_pin_fs);
986 EXPORT_SYMBOL(simple_readpage);
987 EXPORT_SYMBOL(simple_release_fs);
988 EXPORT_SYMBOL(simple_rename);
989 EXPORT_SYMBOL(simple_rmdir);
990 EXPORT_SYMBOL(simple_statfs);
991 EXPORT_SYMBOL(noop_fsync);
992 EXPORT_SYMBOL(simple_unlink);
993 EXPORT_SYMBOL(simple_read_from_buffer);
994 EXPORT_SYMBOL(simple_write_to_buffer);
995 EXPORT_SYMBOL(memory_read_from_buffer);
996 EXPORT_SYMBOL(simple_transaction_set);
997 EXPORT_SYMBOL(simple_transaction_get);
998 EXPORT_SYMBOL(simple_transaction_read);
999 EXPORT_SYMBOL(simple_transaction_release);
1000 EXPORT_SYMBOL_GPL(simple_attr_open);
1001 EXPORT_SYMBOL_GPL(simple_attr_release);
1002 EXPORT_SYMBOL_GPL(simple_attr_read);
1003 EXPORT_SYMBOL_GPL(simple_attr_write);