b7d48312bb
* gnu/build/linux-container.scm (user-namespace-supported?, unprivileged-user-namespace-supported?, setgroups-supported?): New procedures. * tests/container.scm: Use predicates. * tests/syscalls.scm: Likewise.
246 lines
8.1 KiB
Scheme
246 lines
8.1 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2015 David Thompson <davet@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (test-syscalls)
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#:use-module (guix utils)
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#:use-module (guix build syscalls)
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#:use-module (gnu build linux-container)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-64)
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#:use-module (ice-9 match))
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;; Test the (guix build syscalls) module, although there's not much that can
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;; actually be tested without being root.
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(test-begin "syscalls")
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(test-equal "mount, ENOENT"
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ENOENT
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(catch 'system-error
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(lambda ()
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(mount "/dev/null" "/does-not-exist" "ext2")
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#f)
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(compose system-error-errno list)))
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(test-assert "umount, ENOENT/EPERM"
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(catch 'system-error
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(lambda ()
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(umount "/does-not-exist")
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#f)
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(lambda args
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;; Both return values have been encountered in the wild.
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(memv (system-error-errno args) (list EPERM ENOENT)))))
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(test-assert "mount-points"
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;; Reportedly "/" is not always listed as a mount point, so check a few
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;; others (see <http://bugs.gnu.org/20261>.)
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(any (cute member <> (mount-points))
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'("/" "/proc" "/sys" "/dev")))
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(test-assert "swapon, ENOENT/EPERM"
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(catch 'system-error
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(lambda ()
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(swapon "/does-not-exist")
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#f)
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(lambda args
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(memv (system-error-errno args) (list EPERM ENOENT)))))
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(test-assert "swapoff, ENOENT/EINVAL/EPERM"
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(catch 'system-error
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(lambda ()
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(swapoff "/does-not-exist")
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#f)
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(lambda args
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(memv (system-error-errno args) (list EPERM EINVAL ENOENT)))))
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(test-assert "mkdtemp!"
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(let* ((tmp (or (getenv "TMPDIR") "/tmp"))
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(dir (mkdtemp! (string-append tmp "/guix-test-XXXXXX"))))
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(and (file-exists? dir)
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(begin
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(rmdir dir)
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#t))))
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(define (user-namespace pid)
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(string-append "/proc/" (number->string pid) "/ns/user"))
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(define perform-container-tests?
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(and (user-namespace-supported?)
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(unprivileged-user-namespace-supported?)))
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(unless perform-container-tests?
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(test-skip 1))
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(test-assert "clone"
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(match (clone (logior CLONE_NEWUSER SIGCHLD))
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(0 (primitive-exit 42))
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(pid
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;; Check if user namespaces are different.
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(and (not (equal? (readlink (user-namespace pid))
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(readlink (user-namespace (getpid)))))
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(match (waitpid pid)
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((_ . status)
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(= 42 (status:exit-val status))))))))
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(unless perform-container-tests?
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(test-skip 1))
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(test-assert "setns"
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(match (clone (logior CLONE_NEWUSER SIGCHLD))
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(0 (primitive-exit 0))
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(clone-pid
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(match (pipe)
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((in . out)
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(match (primitive-fork)
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(0
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(close in)
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;; Join the user namespace.
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(call-with-input-file (user-namespace clone-pid)
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(lambda (port)
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(setns (port->fdes port) 0)))
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(write 'done out)
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(close out)
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(primitive-exit 0))
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(fork-pid
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(close out)
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;; Wait for the child process to join the namespace.
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(read in)
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(let ((result (and (equal? (readlink (user-namespace clone-pid))
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(readlink (user-namespace fork-pid))))))
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;; Clean up.
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(waitpid clone-pid)
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(waitpid fork-pid)
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result))))))))
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(unless perform-container-tests?
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(test-skip 1))
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(test-assert "pivot-root"
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(match (pipe)
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((in . out)
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(match (clone (logior CLONE_NEWUSER CLONE_NEWNS SIGCHLD))
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(0
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(close in)
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(call-with-temporary-directory
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(lambda (root)
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(let ((put-old (string-append root "/real-root")))
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(mount "none" root "tmpfs")
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(mkdir put-old)
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(call-with-output-file (string-append root "/test")
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(lambda (port)
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(display "testing\n" port)))
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(pivot-root root put-old)
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;; The test file should now be located inside the root directory.
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(write (file-exists? "/test") out)
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(close out))))
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(primitive-exit 0))
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(pid
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(close out)
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(let ((result (read in)))
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(close in)
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(and (zero? (match (waitpid pid)
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((_ . status)
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(status:exit-val status))))
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(eq? #t result))))))))
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(test-assert "all-network-interface-names"
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(match (all-network-interface-names)
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(((? string? names) ..1)
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(member "lo" names))))
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(test-assert "network-interface-names"
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(match (network-interface-names)
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(((? string? names) ..1)
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(lset<= string=? names (all-network-interface-names)))))
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(test-assert "network-interface-flags"
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(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(flags (network-interface-flags sock "lo")))
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(close-port sock)
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(and (not (zero? (logand flags IFF_LOOPBACK)))
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(not (zero? (logand flags IFF_UP))))))
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(test-equal "loopback-network-interface?"
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ENODEV
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(and (loopback-network-interface? "lo")
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(catch 'system-error
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(lambda ()
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(loopback-network-interface? "nonexistent")
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#f)
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(lambda args
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(system-error-errno args)))))
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(test-skip (if (zero? (getuid)) 1 0))
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(test-assert "set-network-interface-flags"
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(catch 'system-error
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(lambda ()
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(set-network-interface-flags sock "lo" IFF_UP))
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(lambda args
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(close-port sock)
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;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
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(memv (system-error-errno args) (list EPERM EACCES))))))
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(test-equal "network-interface-address lo"
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(make-socket-address AF_INET (inet-pton AF_INET "127.0.0.1") 0)
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(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(addr (network-interface-address sock "lo")))
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(close-port sock)
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addr))
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(test-skip (if (zero? (getuid)) 1 0))
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(test-assert "set-network-interface-address"
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(catch 'system-error
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(lambda ()
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(set-network-interface-address sock "nonexistent"
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(make-socket-address
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AF_INET
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(inet-pton AF_INET "127.12.14.15")
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0)))
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(lambda args
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(close-port sock)
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;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
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(memv (system-error-errno args) (list EPERM EACCES))))))
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(test-equal "network-interfaces returns one or more interfaces"
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'(#t #t #t)
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(match (network-interfaces)
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((interfaces ..1)
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(list (every interface? interfaces)
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(every string? (map interface-name interfaces))
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(every vector? (map interface-address interfaces))))))
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(test-equal "network-interfaces returns \"lo\""
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(list #t (make-socket-address AF_INET (inet-pton AF_INET "127.0.0.1") 0))
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(match (filter (lambda (interface)
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(string=? "lo" (interface-name interface)))
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(network-interfaces))
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((loopbacks ..1)
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(list (every (lambda (lo)
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(not (zero? (logand IFF_LOOPBACK (interface-flags lo)))))
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loopbacks)
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(match (find (lambda (lo)
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(= AF_INET (sockaddr:fam (interface-address lo))))
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loopbacks)
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(#f #f)
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(lo (interface-address lo)))))))
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(test-end)
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(exit (= (test-runner-fail-count (test-runner-current)) 0))
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