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authorgVisor bot <gvisor-bot@google.com>2021-04-19 23:28:55 +0000
committergVisor bot <gvisor-bot@google.com>2021-04-19 23:28:55 +0000
commitae3938ad39944b0d67ba0a6aba8efad9307b9868 (patch)
tree2110852b9f8b1d31a52690129c23cfa615653f0c /runsc/fsgofer
parent3b35fa0cf4df131453bad8bab0902e97d0163ea0 (diff)
parent276ff149a4555b69c4c99fdcd4e1a22ccc8b9463 (diff)
Merge release-20210412.0-32-g276ff149a (automated)
Diffstat (limited to 'runsc/fsgofer')
-rw-r--r--runsc/fsgofer/fsgofer.go57
1 files changed, 54 insertions, 3 deletions
diff --git a/runsc/fsgofer/fsgofer.go b/runsc/fsgofer/fsgofer.go
index e04ddda47..b81ede5ae 100644
--- a/runsc/fsgofer/fsgofer.go
+++ b/runsc/fsgofer/fsgofer.go
@@ -21,6 +21,7 @@
package fsgofer
import (
+ "errors"
"fmt"
"io"
"math"
@@ -58,9 +59,6 @@ var verityXattrs = map[string]struct{}{
// join is equivalent to path.Join() but skips path.Clean() which is expensive.
func join(parent, child string) string {
- if child == "." || child == ".." {
- panic(fmt.Sprintf("invalid child path %q", child))
- }
return parent + "/" + child
}
@@ -1226,3 +1224,56 @@ func (l *localFile) checkROMount() error {
}
return nil
}
+
+func (l *localFile) MultiGetAttr(names []string) ([]p9.FullStat, error) {
+ stats := make([]p9.FullStat, 0, len(names))
+
+ if len(names) > 0 && names[0] == "" {
+ qid, valid, attr, err := l.GetAttr(p9.AttrMask{})
+ if err != nil {
+ return nil, err
+ }
+ stats = append(stats, p9.FullStat{
+ QID: qid,
+ Valid: valid,
+ Attr: attr,
+ })
+ names = names[1:]
+ }
+
+ parent := l.file.FD()
+ for _, name := range names {
+ child, err := unix.Openat(parent, name, openFlags|unix.O_PATH, 0)
+ if parent != l.file.FD() {
+ // Parent is no longer needed.
+ _ = unix.Close(parent)
+ }
+ if err != nil {
+ if errors.Is(err, unix.ENOENT) {
+ // No pont in continuing any further.
+ break
+ }
+ return nil, err
+ }
+
+ var stat unix.Stat_t
+ if err := unix.Fstat(child, &stat); err != nil {
+ _ = unix.Close(child)
+ return nil, err
+ }
+ valid, attr := l.fillAttr(&stat)
+ stats = append(stats, p9.FullStat{
+ QID: l.attachPoint.makeQID(&stat),
+ Valid: valid,
+ Attr: attr,
+ })
+ if (stat.Mode & unix.S_IFMT) != unix.S_IFDIR {
+ // Doesn't need to continue if entry is not a dir. Including symlinks
+ // that cannot be followed.
+ _ = unix.Close(child)
+ break
+ }
+ parent = child
+ }
+ return stats, nil
+}