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Use O_EXCL when creating file as we never overwrite an existing file (#7189)

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This commit is contained in:
Krishna Srinivas 2019-02-01 19:01:06 -08:00 committed by Harshavardhana
parent e9fdea05c6
commit 6f08edfb36
2 changed files with 8 additions and 2 deletions
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5
cmd/posix.go
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@ -1105,8 +1105,9 @@ func (s *posix) WriteAll(volume, path string, buf []byte) (err error) {
return errFaultyDisk
}
// Create file if not found
w, err := s.openFile(volume, path, os.O_CREATE|os.O_SYNC|os.O_WRONLY)
// Create file if not found. Note that it is created with os.O_EXCL flag as the file
// always is supposed to be created in the tmp directory with a unique file name.
w, err := s.openFile(volume, path, os.O_CREATE|os.O_SYNC|os.O_WRONLY|os.O_EXCL)
if err != nil {
return err
}

5
cmd/xl-v1-object_test.go
View File

@ -323,6 +323,11 @@ func TestHealing(t *testing.T) {
t.Fatal("HealObject failed")
}
err = os.RemoveAll(path.Join(fsDirs[0], bucket, object, "xl.json"))
if err != nil {
t.Fatal(err)
}
// Write xl.json with different modtime to simulate the case where a disk had
// gone down when an object was replaced by a new object.
xlMetaOutDated := xlMetaPreHeal