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ocfs2: remove ocfs2_reflink_remap_range

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Since ocfs2_remap_file_range is a thin shell around
ocfs2_remap_remap_range, move everything from the latter into the
former.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2018-10-30 10:45:48 +11:00
committed by Dave Chinner
parent 900611a1bd
commit 65f098e91f
3 changed files with 102 additions and 103 deletions
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68
fs/ocfs2/file.c
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@@ -2531,11 +2531,75 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
loff_t len, unsigned int remap_flags)
{
struct inode *inode_in = file_inode(file_in);
struct inode *inode_out = file_inode(file_out);
struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
struct buffer_head *in_bh = NULL, *out_bh = NULL;
bool same_inode = (inode_in == inode_out);
loff_t remapped = 0;
ssize_t ret;
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL;
if (!ocfs2_refcount_tree(osb))
return -EOPNOTSUPP;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;
return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
len, remap_flags);
/* Lock both files against IO */
ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
if (ret)
return ret;
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
goto out_unlock;
ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
&len, remap_flags);
if (ret < 0 || len == 0)
goto out_unlock;
/* Lock out changes to the allocation maps and remap. */
down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
SINGLE_DEPTH_NESTING);
/* Zap any page cache for the destination file's range. */
truncate_inode_pages_range(&inode_out->i_data,
round_down(pos_out, PAGE_SIZE),
round_up(pos_out + len, PAGE_SIZE) - 1);
remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
inode_out, out_bh, pos_out, len);
up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
if (remapped < 0) {
ret = remapped;
mlog_errno(ret);
goto out_unlock;
}
/*
* Empty the extent map so that we may get the right extent
* record from the disk.
*/
ocfs2_extent_map_trunc(inode_in, 0);
ocfs2_extent_map_trunc(inode_out, 0);
ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
out_unlock:
ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
return remapped > 0 ? remapped : ret;
}
const struct inode_operations ocfs2_file_iops = {