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ocfs2: truncate page cache for clone destination file before remapping

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When cloning blocks into another file, truncate the page cache before we
start remapping blocks so that concurrent reads wait for us to finish.

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 10:42:56 +11:00 committed by Dave Chinner
parent 8c5c836bd6
commit 2587b1f1fa
1 changed files with 4 additions and 6 deletions
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10
fs/ocfs2/refcounttree.c
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@ -4861,14 +4861,12 @@ int ocfs2_reflink_remap_range(struct file *file_in,
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, pos_out,
PAGE_ALIGN(pos_out + len) - 1);
ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out,
out_bh, pos_out, len);
/* Zap any page cache for the destination file's range. */
if (!ret)
truncate_inode_pages_range(&inode_out->i_data, pos_out,
PAGE_ALIGN(pos_out + len) - 1);
up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
up_write(&OCFS2_I(inode_out)->ip_alloc_sem);