diff options
| author | Fabricio Voznika <fvoznika@google.com> | 2019-01-31 12:53:00 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-01-31 12:54:00 -0800 |
| commit | a497f5ed5f97e4ad49ed60dd46f0146ae45eefd6 (patch) | |
| tree | 8673e58e90036bc078eca13b548db123ae0a0c12 /pkg/sentry/fs/gofer/inode.go | |
| parent | f1c1ee8a8ea6c0035aa799af3d7f5733fa2275d0 (diff) | |
Invalidate COW mappings when file is truncated
This changed required making fsutil.HostMappable use
a backing file to ensure the correct FD would be used
for read/write operations.
RELNOTES: relnotes is needed for the parent CL.
PiperOrigin-RevId: 231836164
Change-Id: I8ae9639715529874ea7d80a65e2c711a5b4ce254
Diffstat (limited to 'pkg/sentry/fs/gofer/inode.go')
| -rw-r--r-- | pkg/sentry/fs/gofer/inode.go | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/pkg/sentry/fs/gofer/inode.go b/pkg/sentry/fs/gofer/inode.go index 043705c58..1dc0ca0db 100644 --- a/pkg/sentry/fs/gofer/inode.go +++ b/pkg/sentry/fs/gofer/inode.go @@ -170,9 +170,6 @@ func (i *inodeFileState) setHandlesForCachedIO(flags fs.FileFlags, h *handles) { i.writebackRW = true } } - if i.hostMappable != nil { - i.hostMappable.UpdateFD(i.fdLocked()) - } } // getCachedHandles returns any cached handles which would accelerate @@ -520,6 +517,9 @@ func (i *inodeOperations) Truncate(ctx context.Context, inode *fs.Inode, length if i.session().cachePolicy.useCachingInodeOps(inode) { return i.cachingInodeOps.Truncate(ctx, inode, length) } + if i.session().cachePolicy == cacheRemoteRevalidating { + return i.fileState.hostMappable.Truncate(ctx, length) + } return i.fileState.file.setAttr(ctx, p9.SetAttrMask{Size: true}, p9.SetAttr{Size: uint64(length)}) } |