X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fread_write.c;h=296b5711a78b616523215d6e0b8e621433a9b32e;hb=HEAD;hp=e3cd280b158c1132a98c1b53ab2ab8bcdb14de02;hpb=723000c9551d926fb34bc5135512779e3ea5d5d8;p=karo-tx-linux.git

diff --git a/fs/read_write.c b/fs/read_write.c
index e3cd280b158c..296b5711a78b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -29,7 +29,7 @@ typedef ssize_t (*iov_fn_t)(struct kiocb *, const struct iovec *,
 const struct file_operations generic_ro_fops = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
+	.read_iter	= generic_file_read_iter,
 	.mmap		= generic_file_readonly_mmap,
 	.splice_read	= generic_file_splice_read,
 };
@@ -359,6 +359,29 @@ int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t
 	return count > MAX_RW_COUNT ? MAX_RW_COUNT : count;
 }
 
+ssize_t do_aio_read(struct kiocb *kiocb, const struct iovec *iov,
+		    unsigned long nr_segs, loff_t pos)
+{
+	struct file *file = kiocb->ki_filp;
+
+	if (file->f_op->read_iter) {
+		size_t count;
+		struct iov_iter iter;
+		int ret;
+
+		count = 0;
+		ret = generic_segment_checks(iov, &nr_segs, &count,
+					     VERIFY_WRITE);
+		if (ret)
+			return ret;
+
+		iov_iter_init(&iter, iov, nr_segs, count, 0);
+		return file->f_op->read_iter(kiocb, &iter, pos);
+	}
+
+	return file->f_op->aio_read(kiocb, iov, nr_segs, pos);
+}
+
 ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
 {
 	struct iovec iov = { .iov_base = buf, .iov_len = len };
@@ -369,7 +392,7 @@ ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *pp
 	kiocb.ki_pos = *ppos;
 	kiocb.ki_nbytes = len;
 
-	ret = filp->f_op->aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
+	ret = do_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
 	if (-EIOCBQUEUED == ret)
 		ret = wait_on_sync_kiocb(&kiocb);
 	*ppos = kiocb.ki_pos;
@@ -384,7 +407,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
 
 	if (!(file->f_mode & FMODE_READ))
 		return -EBADF;
-	if (!file->f_op || (!file->f_op->read && !file->f_op->aio_read))
+	if (!file_readable(file))
 		return -EINVAL;
 	if (unlikely(!access_ok(VERIFY_WRITE, buf, count)))
 		return -EFAULT;
@@ -408,6 +431,29 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
 
 EXPORT_SYMBOL(vfs_read);
 
+ssize_t do_aio_write(struct kiocb *kiocb, const struct iovec *iov,
+		     unsigned long nr_segs, loff_t pos)
+{
+	struct file *file = kiocb->ki_filp;
+
+	if (file->f_op->write_iter) {
+		size_t count;
+		struct iov_iter iter;
+		int ret;
+
+		count = 0;
+		ret = generic_segment_checks(iov, &nr_segs, &count,
+					     VERIFY_READ);
+		if (ret)
+			return ret;
+
+		iov_iter_init(&iter, iov, nr_segs, count, 0);
+		return file->f_op->write_iter(kiocb, &iter, pos);
+	}
+
+	return file->f_op->aio_write(kiocb, iov, nr_segs, pos);
+}
+
 ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
 {
 	struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
@@ -418,7 +464,7 @@ ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, lof
 	kiocb.ki_pos = *ppos;
 	kiocb.ki_nbytes = len;
 
-	ret = filp->f_op->aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
+	ret = do_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
 	if (-EIOCBQUEUED == ret)
 		ret = wait_on_sync_kiocb(&kiocb);
 	*ppos = kiocb.ki_pos;
@@ -433,7 +479,7 @@ ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t
 	const char __user *p;
 	ssize_t ret;
 
-	if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
+	if (!file_writable(file))
 		return -EINVAL;
 
 	old_fs = get_fs();
@@ -460,7 +506,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
 
 	if (!(file->f_mode & FMODE_WRITE))
 		return -EBADF;
-	if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
+	if (!file_writable(file))
 		return -EINVAL;
 	if (unlikely(!access_ok(VERIFY_READ, buf, count)))
 		return -EFAULT;
@@ -745,10 +791,12 @@ static ssize_t do_readv_writev(int type, struct file *file,
 	fnv = NULL;
 	if (type == READ) {
 		fn = file->f_op->read;
-		fnv = file->f_op->aio_read;
+		if (file->f_op->aio_read || file->f_op->read_iter)
+			fnv = do_aio_read;
 	} else {
 		fn = (io_fn_t)file->f_op->write;
-		fnv = file->f_op->aio_write;
+		if (file->f_op->aio_write || file->f_op->write_iter)
+			fnv = do_aio_write;
 		file_start_write(file);
 	}
 
@@ -778,7 +826,7 @@ ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
 {
 	if (!(file->f_mode & FMODE_READ))
 		return -EBADF;
-	if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
+	if (!file_readable(file))
 		return -EINVAL;
 
 	return do_readv_writev(READ, file, vec, vlen, pos);
@@ -791,7 +839,7 @@ ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
 {
 	if (!(file->f_mode & FMODE_WRITE))
 		return -EBADF;
-	if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
+	if (!file_writable(file))
 		return -EINVAL;
 
 	return do_readv_writev(WRITE, file, vec, vlen, pos);
@@ -927,10 +975,12 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
 	fnv = NULL;
 	if (type == READ) {
 		fn = file->f_op->read;
-		fnv = file->f_op->aio_read;
+		if (file->f_op->aio_read || file->f_op->read_iter)
+			fnv = do_aio_read;
 	} else {
 		fn = (io_fn_t)file->f_op->write;
-		fnv = file->f_op->aio_write;
+		if (file->f_op->aio_write || file->f_op->write_iter)
+			fnv = do_aio_write;
 		file_start_write(file);
 	}
 
@@ -965,7 +1015,7 @@ static size_t compat_readv(struct file *file,
 		goto out;
 
 	ret = -EINVAL;
-	if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
+	if (!file_readable(file))
 		goto out;
 
 	ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
@@ -1032,7 +1082,7 @@ static size_t compat_writev(struct file *file,
 		goto out;
 
 	ret = -EINVAL;
-	if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
+	if (!file_writable(file))
 		goto out;
 
 	ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);