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-rw-r--r--pkg/sentry/fsimpl/proc/filesystem.go22
1 files changed, 20 insertions, 2 deletions
diff --git a/pkg/sentry/fsimpl/proc/filesystem.go b/pkg/sentry/fsimpl/proc/filesystem.go
index ba809b92d..99abcab66 100644
--- a/pkg/sentry/fsimpl/proc/filesystem.go
+++ b/pkg/sentry/fsimpl/proc/filesystem.go
@@ -17,6 +17,7 @@ package proc
import (
"fmt"
+ "strconv"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/context"
@@ -24,10 +25,14 @@ import (
"gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/vfs"
+ "gvisor.dev/gvisor/pkg/syserror"
)
-// Name is the default filesystem name.
-const Name = "proc"
+const (
+ // Name is the default filesystem name.
+ Name = "proc"
+ defaultMaxCachedDentries = uint64(1000)
+)
// FilesystemType is the factory class for procfs.
//
@@ -63,9 +68,22 @@ func (ft FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.VirtualF
if err != nil {
return nil, nil, err
}
+
+ mopts := vfs.GenericParseMountOptions(opts.Data)
+ maxCachedDentries := defaultMaxCachedDentries
+ if str, ok := mopts["dentry_cache_limit"]; ok {
+ delete(mopts, "dentry_cache_limit")
+ maxCachedDentries, err = strconv.ParseUint(str, 10, 64)
+ if err != nil {
+ ctx.Warningf("proc.FilesystemType.GetFilesystem: invalid dentry cache limit: dentry_cache_limit=%s", str)
+ return nil, nil, syserror.EINVAL
+ }
+ }
+
procfs := &filesystem{
devMinor: devMinor,
}
+ procfs.MaxCachedDentries = maxCachedDentries
procfs.VFSFilesystem().Init(vfsObj, &ft, procfs)
var cgroups map[string]string