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ocfs2: truncate page cache for clone destination file before remapping 

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
View File

@ -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);