#include <linux/mount.h>
#include <linux/pagevec.h>
#include <linux/uuid.h>
+#include <linux/file.h>
#include "f2fs.h"
#include "node.h"
static int __exchange_data_block(struct inode *src_inode,
struct inode *dst_inode, pgoff_t src, pgoff_t dst,
- int len, bool full)
+ pgoff_t len, bool full)
{
block_t *src_blkaddr;
int *do_replace;
+ pgoff_t olen;
int ret;
- src_blkaddr = f2fs_kvzalloc(sizeof(block_t) * len, GFP_KERNEL);
- if (!src_blkaddr)
- return -ENOMEM;
+ while (len) {
+ olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
- do_replace = f2fs_kvzalloc(sizeof(int) * len, GFP_KERNEL);
- if (!do_replace) {
- kvfree(src_blkaddr);
- return -ENOMEM;
- }
+ src_blkaddr = f2fs_kvzalloc(sizeof(block_t) * olen, GFP_KERNEL);
+ if (!src_blkaddr)
+ return -ENOMEM;
- ret = __read_out_blkaddrs(src_inode, src_blkaddr, do_replace, src, len);
- if (ret)
- goto roll_back;
+ do_replace = f2fs_kvzalloc(sizeof(int) * olen, GFP_KERNEL);
+ if (!do_replace) {
+ kvfree(src_blkaddr);
+ return -ENOMEM;
+ }
- ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
- do_replace, src, dst, len, full);
- if (ret)
- goto roll_back;
+ ret = __read_out_blkaddrs(src_inode, src_blkaddr,
+ do_replace, src, olen);
+ if (ret)
+ goto roll_back;
- kvfree(src_blkaddr);
- kvfree(do_replace);
+ ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
+ do_replace, src, dst, olen, full);
+ if (ret)
+ goto roll_back;
+
+ src += olen;
+ dst += olen;
+ len -= olen;
+
+ kvfree(src_blkaddr);
+ kvfree(do_replace);
+ }
return 0;
roll_back:
return err;
}
+static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out, size_t len)
+{
+ struct inode *src = file_inode(file_in);
+ struct inode *dst = file_inode(file_out);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(src);
+ size_t olen = len, dst_max_i_size = 0;
+ size_t dst_osize;
+ int ret;
+
+ if (file_in->f_path.mnt != file_out->f_path.mnt ||
+ src->i_sb != dst->i_sb)
+ return -EXDEV;
+
+ if (unlikely(f2fs_readonly(src->i_sb)))
+ return -EROFS;
+
+ if (S_ISDIR(src->i_mode) || S_ISDIR(dst->i_mode))
+ return -EISDIR;
+
+ if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
+ return -EOPNOTSUPP;
+
+ inode_lock(src);
+ if (src != dst)
+ inode_lock(dst);
+
+ ret = -EINVAL;
+ if (pos_in + len > src->i_size || pos_in + len < pos_in)
+ goto out_unlock;
+ if (len == 0)
+ olen = len = src->i_size - pos_in;
+ if (pos_in + len == src->i_size)
+ len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
+ if (len == 0) {
+ ret = 0;
+ goto out_unlock;
+ }
+
+ dst_osize = dst->i_size;
+ if (pos_out + olen > dst->i_size)
+ dst_max_i_size = pos_out + olen;
+
+ /* verify the end result is block aligned */
+ if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
+ !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
+ !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
+ goto out_unlock;
+
+ ret = f2fs_convert_inline_inode(src);
+ if (ret)
+ goto out_unlock;
+
+ ret = f2fs_convert_inline_inode(dst);
+ if (ret)
+ goto out_unlock;
+
+ /* write out all dirty pages from offset */
+ ret = filemap_write_and_wait_range(src->i_mapping,
+ pos_in, pos_in + len);
+ if (ret)
+ goto out_unlock;
+
+ ret = filemap_write_and_wait_range(dst->i_mapping,
+ pos_out, pos_out + len);
+ if (ret)
+ goto out_unlock;
+
+ f2fs_balance_fs(sbi, true);
+ f2fs_lock_op(sbi);
+ ret = __exchange_data_block(src, dst, pos_in,
+ pos_out, len >> F2FS_BLKSIZE_BITS, false);
+
+ if (!ret) {
+ if (dst_max_i_size)
+ f2fs_i_size_write(dst, dst_max_i_size);
+ else if (dst_osize != dst->i_size)
+ f2fs_i_size_write(dst, dst_osize);
+ }
+ f2fs_unlock_op(sbi);
+out_unlock:
+ if (src != dst)
+ inode_unlock(dst);
+ inode_unlock(src);
+ return ret;
+}
+
+static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
+{
+ struct f2fs_move_range range;
+ struct fd dst;
+ int err;
+
+ if (!(filp->f_mode & FMODE_READ) ||
+ !(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
+ sizeof(range)))
+ return -EFAULT;
+
+ dst = fdget(range.dst_fd);
+ if (!dst.file)
+ return -EBADF;
+
+ if (!(dst.file->f_mode & FMODE_WRITE)) {
+ err = -EBADF;
+ goto err_out;
+ }
+
+ err = mnt_want_write_file(filp);
+ if (err)
+ goto err_out;
+
+ err = f2fs_move_file_range(filp, range.pos_in, dst.file,
+ range.pos_out, range.len);
+
+ mnt_drop_write_file(filp);
+
+ if (copy_to_user((struct f2fs_move_range __user *)arg,
+ &range, sizeof(range)))
+ err = -EFAULT;
+err_out:
+ fdput(dst);
+ return err;
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
return f2fs_ioc_write_checkpoint(filp, arg);
case F2FS_IOC_DEFRAGMENT:
return f2fs_ioc_defragment(filp, arg);
+ case F2FS_IOC_MOVE_RANGE:
+ return f2fs_ioc_move_range(filp, arg);
default:
return -ENOTTY;
}
case F2FS_IOC_WRITE_CHECKPOINT:
case F2FS_IOC_DEFRAGMENT:
break;
+ case F2FS_IOC_MOVE_RANGE:
+ break;
default:
return -ENOIOCTLCMD;
}
projects / deliverable / linux.git / blobdiff