[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / fs / sdcardfs / file.c

/*
 * fs/sdcardfs/file.c
 *
 * Copyright (c) 2013 Samsung Electronics Co. Ltd
 *   Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun,
 *               Sunghwan Yun, Sungjong Seo
 *
 * This program has been developed as a stackable file system based on
 * the WrapFS which written by
 *
 * Copyright (c) 1998-2011 Erez Zadok
 * Copyright (c) 2009     Shrikar Archak
 * Copyright (c) 2003-2011 Stony Brook University
 * Copyright (c) 2003-2011 The Research Foundation of SUNY
 *
 * This file is dual licensed.  It may be redistributed and/or modified
 * under the terms of the Apache 2.0 License OR version 2 of the GNU
 * General Public License.
 */

#include "sdcardfs.h"
#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
#include <linux/backing-dev.h>
#endif

static ssize_t sdcardfs_read(struct file *file, char __user *buf,
			   size_t count, loff_t *ppos)
{
	int err;
	struct file *lower_file;
	struct dentry *dentry = file->f_path.dentry;
#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
	struct backing_dev_info *bdi;
#endif

	lower_file = sdcardfs_lower_file(file);

#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
	if (file->f_mode & FMODE_NOACTIVE) {
		if (!(lower_file->f_mode & FMODE_NOACTIVE)) {
			bdi = lower_file->f_mapping->backing_dev_info;
			lower_file->f_ra.ra_pages = bdi->ra_pages * 2;
			spin_lock(&lower_file->f_lock);
			lower_file->f_mode |= FMODE_NOACTIVE;
			spin_unlock(&lower_file->f_lock);
		}
	}
#endif

	err = vfs_read(lower_file, buf, count, ppos);
	/* update our inode atime upon a successful lower read */
	if (err >= 0)
		fsstack_copy_attr_atime(dentry->d_inode,
					lower_file->f_path.dentry->d_inode);

	return err;
}

static ssize_t sdcardfs_write(struct file *file, const char __user *buf,
			    size_t count, loff_t *ppos)
{
	int err = 0;
	struct file *lower_file;
	struct dentry *dentry = file->f_path.dentry;

	/* check disk space */
	if (!check_min_free_space(dentry, count, 0)) {
		printk(KERN_INFO "No minimum free space.\n");
		return -ENOSPC;
	}

	lower_file = sdcardfs_lower_file(file);
	err = vfs_write(lower_file, buf, count, ppos);
	/* update our inode times+sizes upon a successful lower write */
	if (err >= 0) {
		fsstack_copy_inode_size(dentry->d_inode,
					lower_file->f_path.dentry->d_inode);
		fsstack_copy_attr_times(dentry->d_inode,
					lower_file->f_path.dentry->d_inode);
	}

	return err;
}

static int sdcardfs_readdir(struct file *file, struct dir_context *ctx)
{
	int err = 0;
	struct file *lower_file = NULL;
	struct dentry *dentry = file->f_path.dentry;

	lower_file = sdcardfs_lower_file(file);

	lower_file->f_pos = file->f_pos;
	err = iterate_dir(lower_file, ctx);
	file->f_pos = lower_file->f_pos;
	if (err >= 0)		/* copy the atime */
		fsstack_copy_attr_atime(dentry->d_inode,
					lower_file->f_path.dentry->d_inode);
	return err;
}

static long sdcardfs_unlocked_ioctl(struct file *file, unsigned int cmd,
				  unsigned long arg)
{
	long err = -ENOTTY;
	struct file *lower_file;

	lower_file = sdcardfs_lower_file(file);

	/* XXX: use vfs_ioctl if/when VFS exports it */
	if (!lower_file || !lower_file->f_op)
		goto out;
	if (lower_file->f_op->unlocked_ioctl)
		err = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg);

out:
	return err;
}

#ifdef CONFIG_COMPAT
static long sdcardfs_compat_ioctl(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	long err = -ENOTTY;
	struct file *lower_file;

	lower_file = sdcardfs_lower_file(file);

	/* XXX: use vfs_ioctl if/when VFS exports it */
	if (!lower_file || !lower_file->f_op)
		goto out;
	if (lower_file->f_op->compat_ioctl)
		err = lower_file->f_op->compat_ioctl(lower_file, cmd, arg);

out:
	return err;
}
#endif

static int sdcardfs_mmap(struct file *file, struct vm_area_struct *vma)
{
	int err = 0;
	bool willwrite;
	struct file *lower_file;
	const struct vm_operations_struct *saved_vm_ops = NULL;

	/* this might be deferred to mmap's writepage */
	willwrite = ((vma->vm_flags | VM_SHARED | VM_WRITE) == vma->vm_flags);

	/*
	 * File systems which do not implement ->writepage may use
	 * generic_file_readonly_mmap as their ->mmap op.  If you call
	 * generic_file_readonly_mmap with VM_WRITE, you'd get an -EINVAL.
	 * But we cannot call the lower ->mmap op, so we can't tell that
	 * writeable mappings won't work.  Therefore, our only choice is to
	 * check if the lower file system supports the ->writepage, and if
	 * not, return EINVAL (the same error that
	 * generic_file_readonly_mmap returns in that case).
	 */
	lower_file = sdcardfs_lower_file(file);
	if (willwrite && !lower_file->f_mapping->a_ops->writepage) {
		err = -EINVAL;
		printk(KERN_ERR "sdcardfs: lower file system does not "
		       "support writeable mmap\n");
		goto out;
	}

	/*
	 * find and save lower vm_ops.
	 *
	 * XXX: the VFS should have a cleaner way of finding the lower vm_ops
	 */
	if (!SDCARDFS_F(file)->lower_vm_ops) {
		err = lower_file->f_op->mmap(lower_file, vma);
		if (err) {
			printk(KERN_ERR "sdcardfs: lower mmap failed %d\n", err);
			goto out;
		}
		saved_vm_ops = vma->vm_ops; /* save: came from lower ->mmap */
		err = do_munmap(current->mm, vma->vm_start,
				vma->vm_end - vma->vm_start);
		if (err) {
			printk(KERN_ERR "sdcardfs: do_munmap failed %d\n", err);
			goto out;
		}
	}

	/*
	 * Next 3 lines are all I need from generic_file_mmap.  I definitely
	 * don't want its test for ->readpage which returns -ENOEXEC.
	 */
	file_accessed(file);
	vma->vm_ops = &sdcardfs_vm_ops;

	file->f_mapping->a_ops = &sdcardfs_aops; /* set our aops */
	if (!SDCARDFS_F(file)->lower_vm_ops) /* save for our ->fault */
		SDCARDFS_F(file)->lower_vm_ops = saved_vm_ops;

out:
	return err;
}

static int sdcardfs_open(struct inode *inode, struct file *file)
{
	int err = 0;
	struct file *lower_file = NULL;
	struct path lower_path;
	struct dentry *dentry = file->f_path.dentry;
	struct dentry *parent = dget_parent(dentry);
	struct sdcardfs_sb_info *sbi = SDCARDFS_SB(dentry->d_sb);
	const struct cred *saved_cred = NULL;

	/* don't open unhashed/deleted files */
	if (d_unhashed(dentry)) {
		err = -ENOENT;
		goto out_err;
	}

	if(!check_caller_access_to_name(parent->d_inode, &dentry->d_name)) {
		printk(KERN_INFO "%s: need to check the caller's gid in packages.list\n"
                         "	dentry: %s, task:%s\n",
						 __func__, dentry->d_name.name, current->comm);
		err = -EACCES;
		goto out_err;
	}

	/* save current_cred and override it */
	OVERRIDE_CRED(sbi, saved_cred, SDCARDFS_I(inode));

	file->f_mode |= FMODE_NONMAPPABLE;
	file->private_data =
		kzalloc(sizeof(struct sdcardfs_file_info), GFP_KERNEL);
	if (!SDCARDFS_F(file)) {
		err = -ENOMEM;
		goto out_revert_cred;
	}

	/* open lower object and link sdcardfs's file struct to lower's */
	sdcardfs_get_lower_path(file->f_path.dentry, &lower_path);
	lower_file = dentry_open(&lower_path, file->f_flags, current_cred());
	path_put(&lower_path);
	if (IS_ERR(lower_file)) {
		err = PTR_ERR(lower_file);
		lower_file = sdcardfs_lower_file(file);
		if (lower_file) {
			sdcardfs_set_lower_file(file, NULL);
			fput(lower_file); /* fput calls dput for lower_dentry */
		}
	} else {
		sdcardfs_set_lower_file(file, lower_file);
	}

	if (err)
		kfree(SDCARDFS_F(file));
	else {
		sdcardfs_copy_and_fix_attrs(inode, sdcardfs_lower_inode(inode));
	}

out_revert_cred:
	REVERT_CRED(saved_cred);
out_err:
	dput(parent);
	return err;
}

static int sdcardfs_flush(struct file *file, fl_owner_t id)
{
	int err = 0;
	struct file *lower_file = NULL;

	lower_file = sdcardfs_lower_file(file);
	if (lower_file && lower_file->f_op && lower_file->f_op->flush)
		err = lower_file->f_op->flush(lower_file, id);

	return err;
}

/* release all lower object references & free the file info structure */
static int sdcardfs_file_release(struct inode *inode, struct file *file)
{
	struct file *lower_file;

	lower_file = sdcardfs_lower_file(file);
	if (lower_file) {
		sdcardfs_set_lower_file(file, NULL);
		fput(lower_file);
	}

	kfree(SDCARDFS_F(file));
	return 0;
}

static int sdcardfs_fsync(struct file *file, loff_t start, loff_t end,
			int datasync)
{
	int err;
	struct file *lower_file;
	struct path lower_path;
	struct dentry *dentry = file->f_path.dentry;

	err = generic_file_fsync(file, start, end, datasync);
	if (err)
		goto out;

	lower_file = sdcardfs_lower_file(file);
	sdcardfs_get_lower_path(dentry, &lower_path);
	err = vfs_fsync_range(lower_file, start, end, datasync);
	sdcardfs_put_lower_path(dentry, &lower_path);
out:
	return err;
}

static int sdcardfs_fasync(int fd, struct file *file, int flag)
{
	int err = 0;
	struct file *lower_file = NULL;

	lower_file = sdcardfs_lower_file(file);
	if (lower_file->f_op && lower_file->f_op->fasync)
		err = lower_file->f_op->fasync(fd, lower_file, flag);

	return err;
}

static struct file *sdcardfs_get_lower_file(struct file *f)
{
	return sdcardfs_lower_file(f);
}

const struct file_operations sdcardfs_main_fops = {
	.llseek		= generic_file_llseek,
	.read		= sdcardfs_read,
	.write		= sdcardfs_write,
	.unlocked_ioctl	= sdcardfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= sdcardfs_compat_ioctl,
#endif
	.mmap		= sdcardfs_mmap,
	.open		= sdcardfs_open,
	.flush		= sdcardfs_flush,
	.release	= sdcardfs_file_release,
	.fsync		= sdcardfs_fsync,
	.fasync		= sdcardfs_fasync,
	.get_lower_file = sdcardfs_get_lower_file,
};

/* trimmed directory options */
const struct file_operations sdcardfs_dir_fops = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate	= sdcardfs_readdir,
	.unlocked_ioctl	= sdcardfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= sdcardfs_compat_ioctl,
#endif
	.open		= sdcardfs_open,
	.release	= sdcardfs_file_release,
	.flush		= sdcardfs_flush,
	.fsync		= sdcardfs_fsync,
	.fasync		= sdcardfs_fasync,
	.get_lower_file = sdcardfs_get_lower_file,
};
Commit	Line	Data
ee184c81 DC	1	/*
	2	* fs/sdcardfs/file.c
	3	*
	4	* Copyright (c) 2013 Samsung Electronics Co. Ltd
	5	* Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun,
	6	* Sunghwan Yun, Sungjong Seo
	7	*
	8	* This program has been developed as a stackable file system based on
	9	* the WrapFS which written by
	10	*
	11	* Copyright (c) 1998-2011 Erez Zadok
	12	* Copyright (c) 2009 Shrikar Archak
	13	* Copyright (c) 2003-2011 Stony Brook University
	14	* Copyright (c) 2003-2011 The Research Foundation of SUNY
	15	*
	16	* This file is dual licensed. It may be redistributed and/or modified
	17	* under the terms of the Apache 2.0 License OR version 2 of the GNU
	18	* General Public License.
	19	*/
	20
	21	#include "sdcardfs.h"
	22	#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
	23	#include <linux/backing-dev.h>
	24	#endif
	25
	26	static ssize_t sdcardfs_read(struct file file, char __user buf,
	27	size_t count, loff_t *ppos)
	28	{
	29	int err;
	30	struct file *lower_file;
	31	struct dentry *dentry = file->f_path.dentry;
	32	#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
	33	struct backing_dev_info *bdi;
	34	#endif
	35
	36	lower_file = sdcardfs_lower_file(file);
	37
	38	#ifdef CONFIG_SDCARD_FS_FADV_NOACTIVE
	39	if (file->f_mode & FMODE_NOACTIVE) {
	40	if (!(lower_file->f_mode & FMODE_NOACTIVE)) {
	41	bdi = lower_file->f_mapping->backing_dev_info;
	42	lower_file->f_ra.ra_pages = bdi->ra_pages * 2;
	43	spin_lock(&lower_file->f_lock);
	44	lower_file->f_mode \|= FMODE_NOACTIVE;
	45	spin_unlock(&lower_file->f_lock);
	46	}
	47	}
	48	#endif
	49
	50	err = vfs_read(lower_file, buf, count, ppos);
	51	/* update our inode atime upon a successful lower read */
	52	if (err >= 0)
	53	fsstack_copy_attr_atime(dentry->d_inode,
	54	lower_file->f_path.dentry->d_inode);
	55
	56	return err;
	57	}
	58
	59	static ssize_t sdcardfs_write(struct file file, const char __user buf,
	60	size_t count, loff_t *ppos)
	61	{
	62	int err = 0;
	63	struct file *lower_file;
	64	struct dentry *dentry = file->f_path.dentry;
65
66	/* check disk space */
67	if (!check_min_free_space(dentry, count, 0)) {
68	printk(KERN_INFO "No minimum free space.\n");
69	return -ENOSPC;
70	}
71
72	lower_file = sdcardfs_lower_file(file);
73	err = vfs_write(lower_file, buf, count, ppos);
74	/* update our inode times+sizes upon a successful lower write */
75	if (err >= 0) {
76	fsstack_copy_inode_size(dentry->d_inode,
77	lower_file->f_path.dentry->d_inode);
78	fsstack_copy_attr_times(dentry->d_inode,
79	lower_file->f_path.dentry->d_inode);
80	}
81
82	return err;
83	}
84
542a676e	85	static int sdcardfs_readdir(struct file file, struct dir_context ctx)
ee184c81 DC	86	{
	87	int err = 0;
	88	struct file *lower_file = NULL;
	89	struct dentry *dentry = file->f_path.dentry;
	90
	91	lower_file = sdcardfs_lower_file(file);
	92
	93	lower_file->f_pos = file->f_pos;
542a676e	94	err = iterate_dir(lower_file, ctx);
ee184c81 DC	95	file->f_pos = lower_file->f_pos;
	96	if (err >= 0) /* copy the atime */
	97	fsstack_copy_attr_atime(dentry->d_inode,
	98	lower_file->f_path.dentry->d_inode);
	99	return err;
	100	}
	101
	102	static long sdcardfs_unlocked_ioctl(struct file *file, unsigned int cmd,
	103	unsigned long arg)
	104	{
	105	long err = -ENOTTY;
	106	struct file *lower_file;
	107
	108	lower_file = sdcardfs_lower_file(file);
	109
	110	/* XXX: use vfs_ioctl if/when VFS exports it */
	111	if (!lower_file \|\| !lower_file->f_op)
	112	goto out;
	113	if (lower_file->f_op->unlocked_ioctl)
	114	err = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg);
	115
	116	out:
	117	return err;
	118	}
	119
	120	#ifdef CONFIG_COMPAT
	121	static long sdcardfs_compat_ioctl(struct file *file, unsigned int cmd,
	122	unsigned long arg)
	123	{
	124	long err = -ENOTTY;
	125	struct file *lower_file;
	126
	127	lower_file = sdcardfs_lower_file(file);
	128
	129	/* XXX: use vfs_ioctl if/when VFS exports it */
	130	if (!lower_file \|\| !lower_file->f_op)
	131	goto out;
	132	if (lower_file->f_op->compat_ioctl)
	133	err = lower_file->f_op->compat_ioctl(lower_file, cmd, arg);
	134
	135	out:
	136	return err;
	137	}
	138	#endif
	139
	140	static int sdcardfs_mmap(struct file file, struct vm_area_struct vma)
	141	{
	142	int err = 0;
	143	bool willwrite;
	144	struct file *lower_file;
	145	const struct vm_operations_struct *saved_vm_ops = NULL;
	146
	147	/* this might be deferred to mmap's writepage */
	148	willwrite = ((vma->vm_flags \| VM_SHARED \| VM_WRITE) == vma->vm_flags);
	149
	150	/*
	151	* File systems which do not implement ->writepage may use
	152	* generic_file_readonly_mmap as their ->mmap op. If you call
	153	* generic_file_readonly_mmap with VM_WRITE, you'd get an -EINVAL.
	154	* But we cannot call the lower ->mmap op, so we can't tell that
	155	* writeable mappings won't work. Therefore, our only choice is to
	156	* check if the lower file system supports the ->writepage, and if
	157	* not, return EINVAL (the same error that
	158	* generic_file_readonly_mmap returns in that case).
159	*/
160	lower_file = sdcardfs_lower_file(file);
161	if (willwrite && !lower_file->f_mapping->a_ops->writepage) {
162	err = -EINVAL;
163	printk(KERN_ERR "sdcardfs: lower file system does not "
164	"support writeable mmap\n");
165	goto out;
166	}
167
168	/*
169	* find and save lower vm_ops.
170	*
171	* XXX: the VFS should have a cleaner way of finding the lower vm_ops
172	*/
173	if (!SDCARDFS_F(file)->lower_vm_ops) {
174	err = lower_file->f_op->mmap(lower_file, vma);
175	if (err) {
176	printk(KERN_ERR "sdcardfs: lower mmap failed %d\n", err);
177	goto out;
178	}
179	saved_vm_ops = vma->vm_ops; /* save: came from lower ->mmap */
180	err = do_munmap(current->mm, vma->vm_start,
181	vma->vm_end - vma->vm_start);
182	if (err) {
183	printk(KERN_ERR "sdcardfs: do_munmap failed %d\n", err);
184	goto out;
185	}
186	}
187
188	/*
189	* Next 3 lines are all I need from generic_file_mmap. I definitely
190	* don't want its test for ->readpage which returns -ENOEXEC.
191	*/
192	file_accessed(file);
193	vma->vm_ops = &sdcardfs_vm_ops;
ee184c81 DC	194
	195	file->f_mapping->a_ops = &sdcardfs_aops; /* set our aops */
	196	if (!SDCARDFS_F(file)->lower_vm_ops) /* save for our ->fault */
	197	SDCARDFS_F(file)->lower_vm_ops = saved_vm_ops;
	198
	199	out:
	200	return err;
	201	}
	202
	203	static int sdcardfs_open(struct inode inode, struct file file)
	204	{
	205	int err = 0;
	206	struct file *lower_file = NULL;
	207	struct path lower_path;
	208	struct dentry *dentry = file->f_path.dentry;
	209	struct dentry *parent = dget_parent(dentry);
	210	struct sdcardfs_sb_info *sbi = SDCARDFS_SB(dentry->d_sb);
	211	const struct cred *saved_cred = NULL;
ee184c81 DC	212
	213	/* don't open unhashed/deleted files */
	214	if (d_unhashed(dentry)) {
	215	err = -ENOENT;
	216	goto out_err;
	217	}
	218
0bd58959	219	if(!check_caller_access_to_name(parent->d_inode, &dentry->d_name)) {
ee184c81 DC	220	printk(KERN_INFO "%s: need to check the caller's gid in packages.list\n"
	221	" dentry: %s, task:%s\n",
	222	__func__, dentry->d_name.name, current->comm);
	223	err = -EACCES;
	224	goto out_err;
	225	}
	226
	227	/* save current_cred and override it */
f4d33b9a	228	OVERRIDE_CRED(sbi, saved_cred, SDCARDFS_I(inode));
ee184c81	229
8e67babd	230	file->f_mode \|= FMODE_NONMAPPABLE;
ee184c81 DC	231	file->private_data =
	232	kzalloc(sizeof(struct sdcardfs_file_info), GFP_KERNEL);
	233	if (!SDCARDFS_F(file)) {
	234	err = -ENOMEM;
	235	goto out_revert_cred;
	236	}
	237
	238	/* open lower object and link sdcardfs's file struct to lower's */
	239	sdcardfs_get_lower_path(file->f_path.dentry, &lower_path);
542a676e DC	240	lower_file = dentry_open(&lower_path, file->f_flags, current_cred());
542a676e DC	241	path_put(&lower_path);
ee184c81 DC	242	if (IS_ERR(lower_file)) {
	243	err = PTR_ERR(lower_file);
	244	lower_file = sdcardfs_lower_file(file);
	245	if (lower_file) {
	246	sdcardfs_set_lower_file(file, NULL);
	247	fput(lower_file); /* fput calls dput for lower_dentry */
	248	}
	249	} else {
	250	sdcardfs_set_lower_file(file, lower_file);
	251	}
	252
	253	if (err)
	254	kfree(SDCARDFS_F(file));
	255	else {
3ebb8b99	256	sdcardfs_copy_and_fix_attrs(inode, sdcardfs_lower_inode(inode));
ee184c81 DC	257	}
	258
	259	out_revert_cred:
	260	REVERT_CRED(saved_cred);
	261	out_err:
	262	dput(parent);
	263	return err;
	264	}
	265
	266	static int sdcardfs_flush(struct file *file, fl_owner_t id)
	267	{
	268	int err = 0;
	269	struct file *lower_file = NULL;
	270
	271	lower_file = sdcardfs_lower_file(file);
	272	if (lower_file && lower_file->f_op && lower_file->f_op->flush)
	273	err = lower_file->f_op->flush(lower_file, id);
	274
	275	return err;
	276	}
	277
	278	/* release all lower object references & free the file info structure */
	279	static int sdcardfs_file_release(struct inode inode, struct file file)
	280	{
	281	struct file *lower_file;
	282
	283	lower_file = sdcardfs_lower_file(file);
	284	if (lower_file) {
	285	sdcardfs_set_lower_file(file, NULL);
	286	fput(lower_file);
	287	}
	288
	289	kfree(SDCARDFS_F(file));
	290	return 0;
	291	}
	292
542a676e DC	293	static int sdcardfs_fsync(struct file *file, loff_t start, loff_t end,
542a676e DC	294	int datasync)
ee184c81 DC	295	{
	296	int err;
	297	struct file *lower_file;
	298	struct path lower_path;
	299	struct dentry *dentry = file->f_path.dentry;
	300
542a676e DC	301	err = generic_file_fsync(file, start, end, datasync);
	302	if (err)
	303	goto out;
	304
ee184c81 DC	305	lower_file = sdcardfs_lower_file(file);
ee184c81 DC	306	sdcardfs_get_lower_path(dentry, &lower_path);
542a676e	307	err = vfs_fsync_range(lower_file, start, end, datasync);
ee184c81	308	sdcardfs_put_lower_path(dentry, &lower_path);
542a676e	309	out:
ee184c81 DC	310	return err;
	311	}
	312
	313	static int sdcardfs_fasync(int fd, struct file *file, int flag)
	314	{
	315	int err = 0;
	316	struct file *lower_file = NULL;
	317
	318	lower_file = sdcardfs_lower_file(file);
	319	if (lower_file->f_op && lower_file->f_op->fasync)
	320	err = lower_file->f_op->fasync(fd, lower_file, flag);
	321
	322	return err;
	323	}
	324
8e67babd	325	static struct file sdcardfs_get_lower_file(struct file f)
	326	{
	327	return sdcardfs_lower_file(f);
	328	}
	329
ee184c81 DC	330	const struct file_operations sdcardfs_main_fops = {
	331	.llseek = generic_file_llseek,
	332	.read = sdcardfs_read,
	333	.write = sdcardfs_write,
	334	.unlocked_ioctl = sdcardfs_unlocked_ioctl,
	335	#ifdef CONFIG_COMPAT
	336	.compat_ioctl = sdcardfs_compat_ioctl,
	337	#endif
	338	.mmap = sdcardfs_mmap,
	339	.open = sdcardfs_open,
	340	.flush = sdcardfs_flush,
	341	.release = sdcardfs_file_release,
	342	.fsync = sdcardfs_fsync,
	343	.fasync = sdcardfs_fasync,
8e67babd	344	.get_lower_file = sdcardfs_get_lower_file,
ee184c81 DC	345	};
	346
	347	/* trimmed directory options */
	348	const struct file_operations sdcardfs_dir_fops = {
	349	.llseek = generic_file_llseek,
	350	.read = generic_read_dir,
542a676e	351	.iterate = sdcardfs_readdir,
ee184c81 DC	352	.unlocked_ioctl = sdcardfs_unlocked_ioctl,
	353	#ifdef CONFIG_COMPAT
	354	.compat_ioctl = sdcardfs_compat_ioctl,
	355	#endif
	356	.open = sdcardfs_open,
	357	.release = sdcardfs_file_release,
	358	.flush = sdcardfs_flush,
	359	.fsync = sdcardfs_fsync,
	360	.fasync = sdcardfs_fasync,
8e67babd	361	.get_lower_file = sdcardfs_get_lower_file,
ee184c81	362	};