diff options
author | gVisor bot <gvisor-bot@google.com> | 2020-09-18 20:28:30 +0000 |
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committer | gVisor bot <gvisor-bot@google.com> | 2020-09-18 20:28:30 +0000 |
commit | 6e8d229edf071293fc1212f191de386f693a9d7b (patch) | |
tree | c84d9c26ae1ba3f14655f3a560ce8bebb4b6a1c8 /pkg/sentry/fsimpl/tmpfs/tmpfs.go | |
parent | 7d83427b10c1cdbd603c2814b5f674e819dd6fb6 (diff) | |
parent | ca4ecf481d617edfae22a5735a657d60186392e1 (diff) |
Merge release-20200907.0-148-gca4ecf481 (automated)
Diffstat (limited to 'pkg/sentry/fsimpl/tmpfs/tmpfs.go')
-rw-r--r-- | pkg/sentry/fsimpl/tmpfs/tmpfs.go | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go index 4871e55d3..4658e1533 100644 --- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go +++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go @@ -746,37 +746,6 @@ func (fd *fileDescription) RemoveXattr(ctx context.Context, name string) error { return nil } -// NewMemfd creates a new tmpfs regular file and file description that can back -// an anonymous fd created by memfd_create. -func NewMemfd(ctx context.Context, creds *auth.Credentials, mount *vfs.Mount, allowSeals bool, name string) (*vfs.FileDescription, error) { - fs, ok := mount.Filesystem().Impl().(*filesystem) - if !ok { - panic("NewMemfd() called with non-tmpfs mount") - } - - // Per Linux, mm/shmem.c:__shmem_file_setup(), memfd inodes are set up with - // S_IRWXUGO. - inode := fs.newRegularFile(creds.EffectiveKUID, creds.EffectiveKGID, 0777) - rf := inode.impl.(*regularFile) - if allowSeals { - rf.seals = 0 - } - - d := fs.newDentry(inode) - defer d.DecRef(ctx) - d.name = name - - // Per Linux, mm/shmem.c:__shmem_file_setup(), memfd files are set up with - // FMODE_READ | FMODE_WRITE. - var fd regularFileFD - fd.Init(&inode.locks) - flags := uint32(linux.O_RDWR) - if err := fd.vfsfd.Init(&fd, flags, mount, &d.vfsd, &vfs.FileDescriptionOptions{}); err != nil { - return nil, err - } - return &fd.vfsfd, nil -} - // LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. func (fd *fileDescription) LockPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, start, length uint64, whence int16, block fslock.Blocker) error { return fd.Locks().LockPOSIX(ctx, &fd.vfsfd, uid, t, start, length, whence, block) |