From 0d683c9961a6d39d06896a230b8d52edfcf6e0cc Mon Sep 17 00:00:00 2001 From: Nicolas Lacasse Date: Mon, 4 Mar 2019 16:56:11 -0800 Subject: Make tmpfs respect MountNoATime now that fs.Handle is gone. PiperOrigin-RevId: 236752802 Change-Id: I9e50600b2ae25d5f2ac632c4405a7a185bdc3c92 --- pkg/sentry/fs/tmpfs/file_regular.go | 2 +- pkg/sentry/fs/tmpfs/inode_file.go | 12 +++++++----- 2 files changed, 8 insertions(+), 6 deletions(-) (limited to 'pkg/sentry/fs') diff --git a/pkg/sentry/fs/tmpfs/file_regular.go b/pkg/sentry/fs/tmpfs/file_regular.go index 2c1eb0fd2..be6298130 100644 --- a/pkg/sentry/fs/tmpfs/file_regular.go +++ b/pkg/sentry/fs/tmpfs/file_regular.go @@ -44,7 +44,7 @@ type regularFileOperations struct { // Read implements fs.FileOperations.Read. func (r *regularFileOperations) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) { - return r.iops.read(ctx, dst, offset) + return r.iops.read(ctx, file, dst, offset) } // Write implements fs.FileOperations.Write. diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go index 1cc972afa..5648ff8f4 100644 --- a/pkg/sentry/fs/tmpfs/inode_file.go +++ b/pkg/sentry/fs/tmpfs/inode_file.go @@ -250,7 +250,7 @@ func (*fileInodeOperations) StatFS(context.Context) (fs.Info, error) { return fsInfo, nil } -func (f *fileInodeOperations) read(ctx context.Context, dst usermem.IOSequence, offset int64) (int64, error) { +func (f *fileInodeOperations) read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) { var start time.Time if fs.RecordWaitTime { start = time.Now() @@ -280,10 +280,12 @@ func (f *fileInodeOperations) read(ctx context.Context, dst usermem.IOSequence, } n, err := dst.CopyOutFrom(ctx, &fileReadWriter{f, offset}) - // Compare Linux's mm/filemap.c:do_generic_file_read() => file_accessed(). - f.attrMu.Lock() - f.attr.AccessTime = ktime.NowFromContext(ctx) - f.attrMu.Unlock() + if !file.Dirent.Inode.MountSource.Flags.NoAtime { + // Compare Linux's mm/filemap.c:do_generic_file_read() => file_accessed(). + f.attrMu.Lock() + f.attr.AccessTime = ktime.NowFromContext(ctx) + f.attrMu.Unlock() + } fs.IncrementWait(readWait, start) return n, err } -- cgit v1.2.3