From mboxrd@z Thu Jan 1 00:00:00 1970 From: serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org Subject: [PATCH 6/8] cgroup: mount cgroupns-root when inside non-init cgroupns Date: Fri, 29 Jan 2016 02:54:09 -0600 Message-ID: <1454057651-23959-7-git-send-email-serge.hallyn@ubuntu.com> References: <1454057651-23959-1-git-send-email-serge.hallyn@ubuntu.com> Reply-To: LXC development mailing-list Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1454057651-23959-1-git-send-email-serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lxc-devel-bounces-cunTk1MwBs9qMoObBWhMNEqPaTDuhLve2LY78lusg7I@public.gmane.org Sender: "lxc-devel" To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: adityakali-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, Serge Hallyn , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, lxc-devel-cunTk1MwBs9qMoObBWhMNEqPaTDuhLve2LY78lusg7I@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org List-Id: linux-api@vger.kernel.org RnJvbTogU2VyZ2UgSGFsbHluIDxzZXJnZS5oYWxseW5AdWJ1bnR1LmNvbT4KClRoaXMgcGF0Y2gg ZW5hYmxlcyBjZ3JvdXAgbW91bnRpbmcgaW5zaWRlIHVzZXJucyB3aGVuIGEgcHJvY2VzcwphcyBh cHByb3ByaWF0ZSBwcml2aWxlZ2VzLiBUaGUgY2dyb3VwIGZpbGVzeXN0ZW0gbW91bnRlZCBpcwpy b290ZWQgYXQgdGhlIGNncm91cG5zLXJvb3QuIFRodXMsIGluIGEgY29udGFpbmVyLXNldHVwLCBv bmx5CnRoZSBoaWVyYXJjaHkgdW5kZXIgdGhlIGNncm91cG5zLXJvb3QgaXMgZXhwb3NlZCBpbnNp ZGUgdGhlIGNvbnRhaW5lci4KVGhpcyBhbGxvd3MgY29udGFpbmVyIG1hbmFnZW1lbnQgdG9vbHMg dG8gcnVuIGluc2lkZSB0aGUgY29udGFpbmVycwp3aXRob3V0IGRlcGVuZGluZyBvbiBhbnkgZ2xv YmFsIHN0YXRlLgoKU2lnbmVkLW9mZi1ieTogU2VyZ2UgSGFsbHluIDxzZXJnZS5oYWxseW5AY2Fu b25pY2FsLmNvbT4KLS0tCkNoYW5nZWxvZzoKCTIwMTUxMTE2IC0gRG9uJ3QgYWxsb3cgdXNlciBu YW1lc3BhY2VzIHRvIGJpbmQgbmV3IHN1YnN5c3RlbXMKCTIwMTUxMTE4IC0gcG9zdHBvbmUgdGhl IEZTX1VTRVJOU19NT1VOVCBmbGFnIHVudGlsIHRoZQoJICAgICAgICAgICBsYXN0IHBhdGNoLCB1 bnRpbCB3ZSBjYW4gY29udmluY2Ugb3Vyc2VsdmVzIGl0CgkJICAgaXMgc2FmZS4KCTIwMTUxMjA3 IC0gU3dpdGNoIHRvIHdhbGtpbmcgdXAgdGhlIGtlcm5mcyBwYXRoIGZyb20ga24gcm9vdC4KCQkg LSBHcm91cCBpbml0aWFsaXplZCB2YXJpYWJsZXMKCQkgLSBFeHBsYWluIHRoZSBjYXBhYmxlKENB UF9TWVNfQURNSU4pIGNoZWNrCgkJIC0gU3R5bGUgZml4ZXMKCTIwMTYwMTA0IC0ga2VybmZzX25v ZGVfZGVudHJ5OiBsb2NrIGlub2RlIGZvciBsb29rdXBfb25lX2xlbigpCgkyMDE2MDEyOCAtIGdy YWIgbmVlZGVkIGxvY2sgaW4gbW91bnQKClNpZ25lZC1vZmYtYnk6IFNlcmdlIEhhbGx5biA8c2Vy Z2UuaGFsbHluQHVidW50dS5jb20+Ci0tLQoga2VybmVsL2Nncm91cC5jIHwgICA0OCArKysrKysr KysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKy0KIDEgZmlsZSBjaGFuZ2Vk LCA0NyBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCgpkaWZmIC0tZ2l0IGEva2VybmVsL2Nn cm91cC5jIGIva2VybmVsL2Nncm91cC5jCmluZGV4IDk2ZTNkYWIuLjNlMDRkZjAgMTAwNjQ0Ci0t LSBhL2tlcm5lbC9jZ3JvdXAuYworKysgYi9rZXJuZWwvY2dyb3VwLmMKQEAgLTE5ODMsNiArMTk4 Myw3IEBAIHN0YXRpYyBzdHJ1Y3QgZGVudHJ5ICpjZ3JvdXBfbW91bnQoc3RydWN0IGZpbGVfc3lz dGVtX3R5cGUgKmZzX3R5cGUsCiB7CiAJYm9vbCBpc192MiA9IGZzX3R5cGUgPT0gJmNncm91cDJf ZnNfdHlwZTsKIAlzdHJ1Y3Qgc3VwZXJfYmxvY2sgKnBpbm5lZF9zYiA9IE5VTEw7CisJc3RydWN0 IGNncm91cF9uYW1lc3BhY2UgKm5zID0gY3VycmVudC0+bnNwcm94eS0+Y2dyb3VwX25zOwogCXN0 cnVjdCBjZ3JvdXBfc3Vic3lzICpzczsKIAlzdHJ1Y3QgY2dyb3VwX3Jvb3QgKnJvb3Q7CiAJc3Ry dWN0IGNncm91cF9zYl9vcHRzIG9wdHM7CkBAIC0xOTkxLDYgKzE5OTIsMTQgQEAgc3RhdGljIHN0 cnVjdCBkZW50cnkgKmNncm91cF9tb3VudChzdHJ1Y3QgZmlsZV9zeXN0ZW1fdHlwZSAqZnNfdHlw ZSwKIAlpbnQgaTsKIAlib29sIG5ld19zYjsKIAorCWdldF9jZ3JvdXBfbnMobnMpOworCisJLyog Q2hlY2sgaWYgdGhlIGNhbGxlciBoYXMgcGVybWlzc2lvbiB0byBtb3VudC4gKi8KKwlpZiAoIW5z X2NhcGFibGUobnMtPnVzZXJfbnMsIENBUF9TWVNfQURNSU4pKSB7CisJCXB1dF9jZ3JvdXBfbnMo bnMpOworCQlyZXR1cm4gRVJSX1BUUigtRVBFUk0pOworCX0KKwogCS8qCiAJICogVGhlIGZpcnN0 IHRpbWUgYW55b25lIHRyaWVzIHRvIG1vdW50IGEgY2dyb3VwLCBlbmFibGUgdGhlIGxpc3QKIAkg KiBsaW5raW5nIGVhY2ggY3NzX3NldCB0byBpdHMgdGFza3MgYW5kIGZpeCB1cCBhbGwgZXhpc3Rp bmcgdGFza3MuCkBAIC0yMDAxLDYgKzIwMTAsNyBAQCBzdGF0aWMgc3RydWN0IGRlbnRyeSAqY2dy b3VwX21vdW50KHN0cnVjdCBmaWxlX3N5c3RlbV90eXBlICpmc190eXBlLAogCWlmIChpc192Mikg ewogCQlpZiAoZGF0YSkgewogCQkJcHJfZXJyKCJjZ3JvdXAyOiB1bmtub3duIG9wdGlvbiBcIiVz XCJcbiIsIChjaGFyICopZGF0YSk7CisJCQlwdXRfY2dyb3VwX25zKG5zKTsKIAkJCXJldHVybiBF UlJfUFRSKC1FSU5WQUwpOwogCQl9CiAJCWNncnBfZGZsX3Jvb3RfdmlzaWJsZSA9IHRydWU7CkBA IC0yMTA2LDYgKzIxMTYsMTYgQEAgc3RhdGljIHN0cnVjdCBkZW50cnkgKmNncm91cF9tb3VudChz dHJ1Y3QgZmlsZV9zeXN0ZW1fdHlwZSAqZnNfdHlwZSwKIAkJZ290byBvdXRfdW5sb2NrOwogCX0K IAorCS8qCisJICogV2Uga25vdyB0aGlzIHN1YnN5c3RlbSBoYXMgbm90IHlldCBiZWVuIGJvdW5k LiAgVXNlcnMgaW4gYSBub24taW5pdAorCSAqIHVzZXIgbmFtZXNwYWNlIG1heSBvbmx5IG1vdW50 IGhpZXJhcmNoaWVzIHdpdGggbm8gYm91bmQgc3Vic3lzdGVtcywKKwkgKiBpLmUuICdub25lLG5h bWU9dXNlcjEnCisJICovCisJaWYgKCFvcHRzLm5vbmUgJiYgIWNhcGFibGUoQ0FQX1NZU19BRE1J TikpIHsKKwkJcmV0ID0gLUVQRVJNOworCQlnb3RvIG91dF91bmxvY2s7CisJfQorCiAJcm9vdCA9 IGt6YWxsb2Moc2l6ZW9mKCpyb290KSwgR0ZQX0tFUk5FTCk7CiAJaWYgKCFyb290KSB7CiAJCXJl dCA9IC1FTk9NRU07CkBAIC0yMTI0LDEyICsyMTQ0LDM3IEBAIG91dF9mcmVlOgogCWtmcmVlKG9w dHMucmVsZWFzZV9hZ2VudCk7CiAJa2ZyZWUob3B0cy5uYW1lKTsKIAotCWlmIChyZXQpCisJaWYg KHJldCkgeworCQlwdXRfY2dyb3VwX25zKG5zKTsKIAkJcmV0dXJuIEVSUl9QVFIocmV0KTsKKwl9 CiBvdXRfbW91bnQ6CiAJZGVudHJ5ID0ga2VybmZzX21vdW50KGZzX3R5cGUsIGZsYWdzLCByb290 LT5rZl9yb290LAogCQkJICAgICAgaXNfdjIgPyBDR1JPVVAyX1NVUEVSX01BR0lDIDogQ0dST1VQ X1NVUEVSX01BR0lDLAogCQkJICAgICAgJm5ld19zYik7CisKKwkvKgorCSAqIEluIG5vbi1pbml0 IGNncm91cCBuYW1lc3BhY2UsIGluc3RlYWQgb2Ygcm9vdCBjZ3JvdXAncworCSAqIGRlbnRyeSwg d2UgcmV0dXJuIHRoZSBkZW50cnkgY29ycmVzcG9uZGluZyB0byB0aGUKKwkgKiBjZ3JvdXBucy0+ cm9vdF9jZ3JwLgorCSAqLworCWlmICghSVNfRVJSKGRlbnRyeSkgJiYgbnMgIT0gJmluaXRfY2dy b3VwX25zKSB7CisJCXN0cnVjdCBkZW50cnkgKm5zZGVudHJ5OworCQlzdHJ1Y3QgY2dyb3VwICpj Z3JwOworCisJCW11dGV4X2xvY2soJmNncm91cF9tdXRleCk7CisJCXNwaW5fbG9ja19iaCgmY3Nz X3NldF9sb2NrKTsKKworCQljZ3JwID0gY3NldF9jZ3JvdXBfZnJvbV9yb290KG5zLT5yb290X2Nz ZXQsIHJvb3QpOworCisJCXNwaW5fdW5sb2NrX2JoKCZjc3Nfc2V0X2xvY2spOworCQltdXRleF91 bmxvY2soJmNncm91cF9tdXRleCk7CisKKwkJbnNkZW50cnkgPSBrZXJuZnNfbm9kZV9kZW50cnko Y2dycC0+a24sIGRlbnRyeS0+ZF9zYik7CisJCWRwdXQoZGVudHJ5KTsKKwkJZGVudHJ5ID0gbnNk ZW50cnk7CisJfQorCiAJaWYgKElTX0VSUihkZW50cnkpIHx8ICFuZXdfc2IpCiAJCWNncm91cF9w dXQoJnJvb3QtPmNncnApOwogCkBAIC0yMTQyLDYgKzIxODcsNyBAQCBvdXRfbW91bnQ6CiAJCWRl YWN0aXZhdGVfc3VwZXIocGlubmVkX3NiKTsKIAl9CiAKKwlwdXRfY2dyb3VwX25zKG5zKTsKIAly ZXR1cm4gZGVudHJ5OwogfQogCi0tIAoxLjcuOS41CgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpseGMtZGV2ZWwgbWFpbGluZyBsaXN0Cmx4Yy1kZXZlbEBs aXN0cy5saW51eGNvbnRhaW5lcnMub3JnCmh0dHA6Ly9saXN0cy5saW51eGNvbnRhaW5lcnMub3Jn L2xpc3RpbmZvL2x4Yy1kZXZlbAo=