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windows: Support all REPARSE_POINT attrib files properly. (#4203)

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This change adopts the upstream fix in this regard at
https://go-review.googlesource.com/#/c/41834/ for Minio's
purposes.

Go's current os.Stat() lacks support for lot of strange
windows files such as

 - share symlinks on SMB2
 - symlinks on docker nanoserver
 - de-duplicated files on NTFS de-duplicated volume.

This PR attempts to incorporate the change mentioned here

   https://blogs.msdn.microsoft.com/oldnewthing/20100212-00/?p=14963/

The article suggests to use Windows I/O manager to
dereference the symbolic link.

Fixes #4122
This commit is contained in:
Harshavardhana
2017-05-02 02:35:27 -07:00
committed by GitHub
parent 44d53c9c67
commit f0b5c0ec7c
20 changed files with 497 additions and 56 deletions
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4
cmd/fs-v1-helpers_test.go
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@@ -442,11 +442,11 @@ func TestFSRemoveMeta(t *testing.T) {
t.Fatalf("Unable to remove file, %s", err)
}
if _, err := os.Stat(filePath); !os.IsNotExist(err) {
if _, err := osStat(preparePath(filePath)); !os.IsNotExist(err) {
t.Fatalf("`%s` file found though it should have been deleted.", filePath)
}
if _, err := os.Stat(path.Dir(filePath)); !os.IsNotExist(err) {
if _, err := osStat(preparePath(path.Dir(filePath))); !os.IsNotExist(err) {
t.Fatalf("`%s` parent directory found though it should have been deleted.", filePath)
}
}