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authorGoogler <noreply@google.com>2019-02-13 12:06:20 -0800
committerShentubot <shentubot@google.com>2019-02-13 12:07:34 -0800
commit7aaa6cf22594cfc7eff2070191c0077bfd58046a (patch)
treef67f13952444ba3f66ca61e7c5be2c672e03aa48 /pkg/sentry/fs/tmpfs
parent2c7488454e7fcbf98c00bcdceb70cb8e2fa98c96 (diff)
Internal change.
PiperOrigin-RevId: 233802562 Change-Id: I40e1b13fd571daaf241b00f8df4bcedd034dc3f1
Diffstat (limited to 'pkg/sentry/fs/tmpfs')
-rw-r--r--pkg/sentry/fs/tmpfs/BUILD1
-rw-r--r--pkg/sentry/fs/tmpfs/inode_file.go13
2 files changed, 14 insertions, 0 deletions
diff --git a/pkg/sentry/fs/tmpfs/BUILD b/pkg/sentry/fs/tmpfs/BUILD
index bf5b68869..9570c71e5 100644
--- a/pkg/sentry/fs/tmpfs/BUILD
+++ b/pkg/sentry/fs/tmpfs/BUILD
@@ -15,6 +15,7 @@ go_library(
visibility = ["//pkg/sentry:internal"],
deps = [
"//pkg/abi/linux",
+ "//pkg/metric",
"//pkg/sentry/context",
"//pkg/sentry/device",
"//pkg/sentry/fs",
diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go
index 2505e2c69..ef5e67dda 100644
--- a/pkg/sentry/fs/tmpfs/inode_file.go
+++ b/pkg/sentry/fs/tmpfs/inode_file.go
@@ -18,6 +18,7 @@ import (
"io"
"sync"
+ "gvisor.googlesource.com/gvisor/pkg/metric"
"gvisor.googlesource.com/gvisor/pkg/sentry/context"
"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
"gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil"
@@ -29,6 +30,12 @@ import (
"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
)
+var (
+ opensRO = metric.MustCreateNewUint64Metric("/in_memory_file/opens_ro", false /* sync */, "Number of times an in-memory file was opened in read-only mode.")
+ opensW = metric.MustCreateNewUint64Metric("/in_memory_file/opens_w", false /* sync */, "Number of times an in-memory file was opened in write mode.")
+ reads = metric.MustCreateNewUint64Metric("/in_memory_file/reads", false /* sync */, "Number of in-memory file reads.")
+)
+
// fileInodeOperations implements fs.InodeOperations for a regular tmpfs file.
// These files are backed by FrameRegions allocated from a platform.Memory,
// and may be directly mapped.
@@ -116,6 +123,11 @@ func (*fileInodeOperations) Rename(ctx context.Context, oldParent *fs.Inode, old
// GetFile implements fs.InodeOperations.GetFile.
func (f *fileInodeOperations) GetFile(ctx context.Context, d *fs.Dirent, flags fs.FileFlags) (*fs.File, error) {
+ if flags.Write {
+ opensW.Increment()
+ } else if flags.Read {
+ opensRO.Increment()
+ }
flags.Pread = true
flags.Pwrite = true
return fs.NewFile(ctx, d, flags, &regularFileOperations{iops: f}), nil
@@ -237,6 +249,7 @@ func (*fileInodeOperations) StatFS(context.Context) (fs.Info, error) {
}
func (f *fileInodeOperations) read(ctx context.Context, dst usermem.IOSequence, offset int64) (int64, error) {
+ reads.Increment()
// Zero length reads for tmpfs are no-ops.
if dst.NumBytes() == 0 {
return 0, nil