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Diffstat (limited to 'fs/xfs/xfs_reflink.c')
-rw-r--r--fs/xfs/xfs_reflink.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index f135748d8282..59da9708e9c1 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -1264,6 +1264,7 @@ xfs_reflink_zero_posteof(
* Prepare two files for range cloning. Upon a successful return both inodes
* will have the iolock and mmaplock held, the page cache of the out file
* will be truncated, and any leases on the out file will have been broken.
+ * This function borrows heavily from xfs_file_aio_write_checks.
*/
STATIC int
xfs_reflink_remap_prep(
@@ -1327,6 +1328,30 @@ xfs_reflink_remap_prep(
/* 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);
+
+ /* If we're altering the file contents... */
+ if (!is_dedupe) {
+ /*
+ * ...update the timestamps (which will grab the ilock again
+ * from xfs_fs_dirty_inode, so we have to call it before we
+ * take the ilock).
+ */
+ if (!(file_out->f_mode & FMODE_NOCMTIME)) {
+ ret = file_update_time(file_out);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /*
+ * ...clear the security bits if the process is not being run
+ * by root. This keeps people from modifying setuid and setgid
+ * binaries.
+ */
+ ret = file_remove_privs(file_out);
+ if (ret)
+ goto out_unlock;
+ }
+
return 1;
out_unlock:
xfs_reflink_remap_unlock(file_in, file_out);