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| author | Amir Goldstein <amir73il@gmail.com> | 2019-02-27 13:32:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-15 11:54:11 +0200 |
| commit | afec706807cd326ab2a5e4d08162cda98eb495a0 (patch) | |
| tree | ac3f725e85620be7c0749b9b1538549fb8618249 /include | |
| parent | 22dac6cc9549fec8ceb82ec1cc6da24a9f5a6705 (diff) | |
ovl: support stacked SEEK_HOLE/SEEK_DATA
commit 9e46b840c7053b5f7a245e98cd239b60d189a96c upstream.
Overlay file f_pos is the master copy that is preserved
through copy up and modified on read/write, but only real
fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose
limitations that are more strict than ->s_maxbytes for specific
files, so we use the real file to perform seeks.
We do not call real fs for SEEK_CUR:0 query and for SEEK_SET:0
requests.
Fixes: d1d04ef8572b ("ovl: stack file ops")
Reported-by: Eddie Horng <eddiehorng.tw@gmail.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions