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| author | Luis Henriques <lhenriques@suse.com> | 2018-10-23 16:53:14 +0000 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-11-08 17:50:37 +0100 |
| commit | c2c6d3ce0d9a1fae4472fc10755372d022a487a4 (patch) | |
| tree | 6f540f39026f4c7eebfc471f0869ac0d304a5b0c /fs | |
| parent | 651022382c7f8da46cb4872a545ee1da6d097d2a (diff) | |
| download | linux-c2c6d3ce0d9a1fae4472fc10755372d022a487a4.tar.gz linux-c2c6d3ce0d9a1fae4472fc10755372d022a487a4.tar.bz2 linux-c2c6d3ce0d9a1fae4472fc10755372d022a487a4.zip | |
ceph: add destination file data sync before doing any remote copy
If we try to copy into a file that was just written, any data that is
remote copied will be overwritten by our buffered writes once they are
flushed. When this happens, the call to invalidate_inode_pages2_range
will also return a -EBUSY error.
This patch fixes this by also sync'ing the destination file before
starting any copy.
Fixes: 503f82a9932d ("ceph: support copy_file_range file operation")
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/file.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 27cad84dab23..189df668b6a0 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1931,10 +1931,17 @@ static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, if (!prealloc_cf) return -ENOMEM; - /* Start by sync'ing the source file */ + /* Start by sync'ing the source and destination files */ ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); - if (ret < 0) + if (ret < 0) { + dout("failed to write src file (%zd)\n", ret); + goto out; + } + ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); + if (ret < 0) { + dout("failed to write dst file (%zd)\n", ret); goto out; + } /* * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other |