* Tests a slave mount: slave mount is like a shared mount except that mount and umount events only propagate towards it
Signed-off-by: Matus Marhefka <mmarh...@redhat.com> --- runtest/containers | 1 + testcases/kernel/containers/.gitignore | 1 + testcases/kernel/containers/mountns/mountns03.c | 179 ++++++++++++++++++++++++ 3 files changed, 181 insertions(+) create mode 100644 testcases/kernel/containers/mountns/mountns03.c diff --git a/runtest/containers b/runtest/containers index 56977c0..3653c9c 100644 --- a/runtest/containers +++ b/runtest/containers @@ -58,3 +58,4 @@ utstest_clone_5 utstest clone 5 mountns01 mountns01 mountns02 mountns02 +mountns03 mountns03 diff --git a/testcases/kernel/containers/.gitignore b/testcases/kernel/containers/.gitignore index f175296..5b96cb9 100644 --- a/testcases/kernel/containers/.gitignore +++ b/testcases/kernel/containers/.gitignore @@ -1,3 +1,4 @@ /check_for_unshare mountns/mountns01 mountns/mountns02 +mountns/mountns03 diff --git a/testcases/kernel/containers/mountns/mountns03.c b/testcases/kernel/containers/mountns/mountns03.c new file mode 100644 index 0000000..eb64581 --- /dev/null +++ b/testcases/kernel/containers/mountns/mountns03.c @@ -0,0 +1,179 @@ +/* Copyright (c) 2014 Red Hat, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of version 2 the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + *********************************************************************** + * File: mountns03.c + * + * Tests a slave mount: slave mount is like a shared mount except that + * mount and umount events only propagate towards it. + * + * Description: + * 1. Creates directories "A", "B" and files "A/A", "B/B" + * 2. Unshares mount namespace and makes it private (so mounts/umounts + * have no effect on a real system) + * 3. Bind mounts directory "A" to itself + * 4. Makes directory "A" shared + * 5. Clones a new child process with CLONE_NEWNS flag and makes "A" + * a slave mount + * 6. There are two testcases (where X is parent namespace and Y child + * namespace): + * 1) + * X: bind mounts "B" to "A" + * Y: must see the file "A/B" + * X: umounts "A" + * 2) + * Y: bind mounts "B" to "A" + * X: must see only the "A/A" and must not see "A/B" (as slave + * mount does not forward propagation) + * Y: umounts "A" + ***********************************************************************/ + +#define _GNU_SOURCE +#include <sys/wait.h> +#include <sys/mount.h> +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include "test.h" +#include "usctest.h" +#include "libclone.h" +#include "safe_macros.h" +#include "safe_file_ops.h" +#include "mountns_helper.h" + + +char *TCID = "mountns03"; +int TST_TOTAL = 2; + + +#if defined(MS_SHARED) && defined(MS_PRIVATE) \ + && defined(MS_REC) && defined(MS_SLAVE) + +int child_func(void *arg) +{ + int ret = 0; + + /* makes mount DIRA a slave of DIRA (all slave mounts have + * a master mount which is a shared mount) */ + if (mount("none", DIRA, "none", MS_SLAVE, NULL) == -1) { + perror("mount"); + return 1; + } + + TST_CHECKPOINT_SIGNAL_PARENT(&checkpoint1); + TST_CHECKPOINT_CHILD_WAIT(&checkpoint2); + + /* checks that shared mounts propagates to slave mount */ + if (access(DIRA"/B", F_OK) == -1) + ret = 2; + + TST_CHECKPOINT_SIGNAL_PARENT(&checkpoint1); + TST_CHECKPOINT_CHILD_WAIT(&checkpoint2); + + /* bind mounts DIRB to DIRA making contents of DIRB visible + * in DIRA */ + if (mount(DIRB, DIRA, "none", MS_BIND, NULL) == -1) { + perror("mount"); + return 1; + } + + TST_CHECKPOINT_SIGNAL_PARENT(&checkpoint1); + TST_CHECKPOINT_CHILD_WAIT(&checkpoint2); + + umount(DIRA); + return ret; +} + +static void test(void) +{ + int status; + + /* unshares the mount ns */ + if (unshare(CLONE_NEWNS) == -1) + tst_brkm(TBROK | TERRNO, cleanup, "unshare failed"); + /* makes sure parent mounts/umounts have no effect on a real system */ + SAFE_MOUNT(cleanup, "none", "/", "none", MS_REC|MS_PRIVATE, NULL); + + /* bind mounts DIRA to itself */ + SAFE_MOUNT(cleanup, DIRA, DIRA, "none", MS_BIND, NULL); + + /* makes mount DIRA shared */ + SAFE_MOUNT(cleanup, "none", DIRA, "none", MS_SHARED, NULL); + + if (do_clone_tests(CLONE_NEWNS, child_func, NULL, NULL, NULL) == -1) + tst_brkm(TBROK | TERRNO, cleanup, "clone failed"); + + /* waits for child to make a slave mount */ + TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1); + + /* bind mounts DIRB to DIRA making contents of DIRB visible + * in DIRA */ + SAFE_MOUNT(cleanup, DIRB, DIRA, "none", MS_BIND, NULL); + + TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2); + TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1); + + SAFE_UMOUNT(cleanup, DIRA); + + TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2); + TST_CHECKPOINT_PARENT_WAIT(cleanup, &checkpoint1); + + /* checks that slave mount doesn't propagate to shared mount */ + if ((access(DIRA"/A", F_OK) == 0) && (access(DIRA"/B", F_OK) == -1)) + tst_resm(TPASS, "propagation from slave mount passed"); + else + tst_resm(TFAIL, "propagation form slave mount failed"); + + TST_CHECKPOINT_SIGNAL_CHILD(cleanup, &checkpoint2); + + + SAFE_WAIT(cleanup, &status); + if (WIFEXITED(status)) { + if (WEXITSTATUS(status) == 0) + tst_resm(TPASS, "propagation to slave mount passed"); + else + tst_resm(TFAIL, "propagation to slave mount failed"); + } + if (WIFSIGNALED(status)) { + tst_resm(TBROK, "child was killed with signal %s", + tst_strsig(WTERMSIG(status))); + return; + } + + SAFE_UMOUNT(cleanup, DIRA); +} + +int main(int argc, char *argv[]) +{ + const char *msg; + int lc; + + msg = parse_opts(argc, argv, NULL, NULL); + if (msg != NULL) + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); + + setup(); + + for (lc = 0; TEST_LOOPING(lc); lc++) + test(); + + cleanup(); + tst_exit(); +} + +#else +int main(void) +{ + tst_brkm(TCONF, NULL, "needed mountflags are not defined"); +} +#endif -- 1.8.3.1 ------------------------------------------------------------------------------ Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list
