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| author | Dean Deng <deandeng@google.com> | 2020-09-17 15:36:40 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-09-17 15:38:44 -0700 |
| commit | 319d1b8ba0604e7bc029f98ae0e9b09badd5abad (patch) | |
| tree | 59de10aebb09e3ee68dc5444fb9abafc070cffdb /pkg/sentry/fsimpl/gofer/special_file.go | |
| parent | 8070cc3386d461752dc0e601f8a11f8b54f482a6 (diff) | |
Complete vfs2 implementation of fallocate.
This change includes overlay, special regular gofer files, and hostfs.
Fixes #3589.
PiperOrigin-RevId: 332330860
Diffstat (limited to 'pkg/sentry/fsimpl/gofer/special_file.go')
| -rw-r--r-- | pkg/sentry/fsimpl/gofer/special_file.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go index 3c39aa9b7..dc960e5bf 100644 --- a/pkg/sentry/fsimpl/gofer/special_file.go +++ b/pkg/sentry/fsimpl/gofer/special_file.go @@ -22,6 +22,7 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/p9" "gvisor.dev/gvisor/pkg/safemem" "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/syserror" @@ -135,6 +136,16 @@ func (fd *specialFileFD) EventUnregister(e *waiter.Entry) { fd.fileDescription.EventUnregister(e) } +func (fd *specialFileFD) Allocate(ctx context.Context, mode, offset, length uint64) error { + if fd.isRegularFile { + d := fd.dentry() + return d.doAllocate(ctx, offset, length, func() error { + return fd.handle.file.allocate(ctx, p9.ToAllocateMode(mode), offset, length) + }) + } + return fd.FileDescriptionDefaultImpl.Allocate(ctx, mode, offset, length) +} + // PRead implements vfs.FileDescriptionImpl.PRead. func (fd *specialFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts vfs.ReadOptions) (int64, error) { if fd.seekable && offset < 0 { |