diff options
| author | Nicolas Lacasse <nlacasse@google.com> | 2019-11-20 14:54:03 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-11-20 15:07:16 -0800 |
| commit | 012102eefd2b145ddee774cba28e4fa889fadd49 (patch) | |
| tree | 8150e163ee3ba161370194d2bdd00642faa820c1 /pkg/sentry/fs/flags.go | |
| parent | ef6f93625457c166628fc9de57c15d986ae83159 (diff) | |
Pass OpenTruncate to gofer in Open call when opening file with O_TRUNC.
Note that the Sentry still calls Truncate() on the file before calling Open.
A new p9 version check was added to ensure that the p9 server can handle the
the OpenTruncate flag. If not, then the flag is stripped before sending.
PiperOrigin-RevId: 281609112
Diffstat (limited to 'pkg/sentry/fs/flags.go')
| -rw-r--r-- | pkg/sentry/fs/flags.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/sentry/fs/flags.go b/pkg/sentry/fs/flags.go index 0fab876a9..4338ae1fa 100644 --- a/pkg/sentry/fs/flags.go +++ b/pkg/sentry/fs/flags.go @@ -64,6 +64,10 @@ type FileFlags struct { // NonSeekable indicates that file.offset isn't used. NonSeekable bool + + // Truncate indicates that the file should be truncated before opened. + // This is only applicable if the file is regular. + Truncate bool } // SettableFileFlags is a subset of FileFlags above that can be changed @@ -118,6 +122,9 @@ func (f FileFlags) ToLinux() (mask uint) { if f.LargeFile { mask |= linux.O_LARGEFILE } + if f.Truncate { + mask |= linux.O_TRUNC + } switch { case f.Read && f.Write: |