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Fix "snapdev" property issues
When inheriting the "snapdev" property to we don't always call
zfs_prop_set_special(): this prevents device nodes from being created in
certain situations. Because "snapdev" is the only *special* property
that is also inheritable we need to call zfs_prop_set_special() even
when we're not reverting it to the received value ('zfs inherit -S').
Additionally, fix a NULL pointer dereference accidentally introduced in
5559ba0 that can be triggered when setting the "snapdev" property to
the value "hidden" twice.
Finally, add a new test case "zvol_misc_snapdev" to the ZFS Test Suite.
Reviewed by: Boris Protopopov <bprotopopov@hotmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6131
Closes #6175
Closes #6176
This commit is contained in:
LOLi
Brian Behlendorf
parent
b870c4b5d7
commit
92aceb2a7e
@ -2761,54 +2761,12 @@ zfs_ioc_inherit_prop(zfs_cmd_t *zc)
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zprop_source_t source = (received
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? ZPROP_SRC_NONE /* revert to received value, if any */
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: ZPROP_SRC_INHERITED); /* explicitly inherit */
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nvlist_t *dummy;
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nvpair_t *pair;
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zprop_type_t type;
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int err;
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if (received) {
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nvlist_t *dummy;
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nvpair_t *pair;
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zprop_type_t type;
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int err;
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/*
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* zfs_prop_set_special() expects properties in the form of an
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* nvpair with type info.
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*/
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if (prop == ZPROP_INVAL) {
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if (!zfs_prop_user(propname))
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return (SET_ERROR(EINVAL));
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type = PROP_TYPE_STRING;
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} else if (prop == ZFS_PROP_VOLSIZE ||
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prop == ZFS_PROP_VERSION) {
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return (SET_ERROR(EINVAL));
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} else {
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type = zfs_prop_get_type(prop);
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}
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VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
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switch (type) {
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case PROP_TYPE_STRING:
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VERIFY(0 == nvlist_add_string(dummy, propname, ""));
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break;
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case PROP_TYPE_NUMBER:
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case PROP_TYPE_INDEX:
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VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
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break;
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default:
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nvlist_free(dummy);
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return (SET_ERROR(EINVAL));
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}
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pair = nvlist_next_nvpair(dummy, NULL);
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if (pair == NULL) {
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nvlist_free(dummy);
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return (SET_ERROR(EINVAL));
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}
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err = zfs_prop_set_special(zc->zc_name, source, pair);
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nvlist_free(dummy);
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if (err != -1)
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return (err); /* special property already handled */
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} else {
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if (!received) {
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/*
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* Only check this in the non-received case. We want to allow
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* 'inherit -S' to revert non-inheritable properties like quota
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@ -2819,8 +2777,49 @@ zfs_ioc_inherit_prop(zfs_cmd_t *zc)
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return (SET_ERROR(EINVAL));
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}
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/* property name has been validated by zfs_secpolicy_inherit_prop() */
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return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
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if (prop == ZPROP_INVAL) {
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if (!zfs_prop_user(propname))
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return (SET_ERROR(EINVAL));
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type = PROP_TYPE_STRING;
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} else if (prop == ZFS_PROP_VOLSIZE || prop == ZFS_PROP_VERSION) {
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return (SET_ERROR(EINVAL));
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} else {
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type = zfs_prop_get_type(prop);
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}
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/*
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* zfs_prop_set_special() expects properties in the form of an
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* nvpair with type info.
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*/
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dummy = fnvlist_alloc();
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switch (type) {
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case PROP_TYPE_STRING:
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VERIFY(0 == nvlist_add_string(dummy, propname, ""));
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break;
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case PROP_TYPE_NUMBER:
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case PROP_TYPE_INDEX:
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VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
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break;
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default:
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err = SET_ERROR(EINVAL);
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goto errout;
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}
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pair = nvlist_next_nvpair(dummy, NULL);
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if (pair == NULL) {
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err = SET_ERROR(EINVAL);
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} else {
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err = zfs_prop_set_special(zc->zc_name, source, pair);
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if (err == -1) /* property is not "special", needs handling */
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err = dsl_prop_inherit(zc->zc_name, zc->zc_value,
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source);
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}
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errout:
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nvlist_free(dummy);
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return (err);
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}
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static int
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@ -2018,7 +2018,7 @@ zvol_remove_minors_impl(const char *name)
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static void
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zvol_remove_minor_impl(const char *name)
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{
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zvol_state_t *zv, *zv_next;
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zvol_state_t *zv = NULL, *zv_next;
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if (zvol_inhibit_dev)
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return;
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@ -2049,12 +2049,11 @@ zvol_remove_minor_impl(const char *name)
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}
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}
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/* Drop zvol_state_lock before calling zvol_free() */
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mutex_exit(&zvol_state_lock);
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/*
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* Drop zvol_state_lock before calling zvol_free()
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*/
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zvol_free(zv);
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if (zv != NULL)
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zvol_free(zv);
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}
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/*
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@ -2224,20 +2223,18 @@ zvol_set_snapdev_check(void *arg, dmu_tx_t *tx)
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return (error);
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}
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/* ARGSUSED */
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static int
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zvol_set_snapdev_sync_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
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{
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zvol_set_snapdev_arg_t *zsda = arg;
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char dsname[MAXNAMELEN];
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zvol_task_t *task;
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uint64_t snapdev;
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dsl_dataset_name(ds, dsname);
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dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_SNAPDEV),
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zsda->zsda_source, sizeof (zsda->zsda_value), 1,
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&zsda->zsda_value, zsda->zsda_tx);
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task = zvol_task_alloc(ZVOL_ASYNC_SET_SNAPDEV, dsname,
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NULL, zsda->zsda_value);
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if (dsl_prop_get_int_ds(ds, "snapdev", &snapdev) != 0)
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return (0);
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task = zvol_task_alloc(ZVOL_ASYNC_SET_SNAPDEV, dsname, NULL, snapdev);
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if (task == NULL)
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return (0);
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@ -2247,7 +2244,11 @@ zvol_set_snapdev_sync_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
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}
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/*
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* Traverse all child snapshot datasets and apply snapdev appropriately.
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* Traverse all child datasets and apply snapdev appropriately.
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* We call dsl_prop_set_sync_impl() here to set the value only on the toplevel
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* dataset and read the effective "snapdev" on every child in the callback
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* function: this is because the value is not guaranteed to be the same in the
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* whole dataset hierarchy.
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*/
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static void
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zvol_set_snapdev_sync(void *arg, dmu_tx_t *tx)
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@ -2255,10 +2256,19 @@ zvol_set_snapdev_sync(void *arg, dmu_tx_t *tx)
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zvol_set_snapdev_arg_t *zsda = arg;
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dsl_pool_t *dp = dmu_tx_pool(tx);
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dsl_dir_t *dd;
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dsl_dataset_t *ds;
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int error;
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VERIFY0(dsl_dir_hold(dp, zsda->zsda_name, FTAG, &dd, NULL));
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zsda->zsda_tx = tx;
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error = dsl_dataset_hold(dp, zsda->zsda_name, FTAG, &ds);
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if (error == 0) {
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dsl_prop_set_sync_impl(ds, zfs_prop_to_name(ZFS_PROP_SNAPDEV),
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zsda->zsda_source, sizeof (zsda->zsda_value), 1,
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&zsda->zsda_value, zsda->zsda_tx);
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dsl_dataset_rele(ds, FTAG);
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}
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dmu_objset_find_dp(dp, dd->dd_object, zvol_set_snapdev_sync_cb,
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zsda, DS_FIND_CHILDREN);
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@ -564,7 +564,8 @@ tests = ['zvol_cli_001_pos', 'zvol_cli_002_pos', 'zvol_cli_003_neg']
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[tests/functional/zvol/zvol_misc]
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tests = ['zvol_misc_001_neg', 'zvol_misc_002_pos', 'zvol_misc_003_neg',
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'zvol_misc_004_pos', 'zvol_misc_005_neg', 'zvol_misc_006_pos']
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'zvol_misc_004_pos', 'zvol_misc_005_neg', 'zvol_misc_006_pos',
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'zvol_misc_snapdev']
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[tests/functional/zvol/zvol_swap]
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tests = ['zvol_swap_001_pos', 'zvol_swap_002_pos', 'zvol_swap_003_pos',
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@ -7,4 +7,5 @@ dist_pkgdata_SCRIPTS = \
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zvol_misc_003_neg.ksh \
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zvol_misc_004_pos.ksh \
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zvol_misc_005_neg.ksh \
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zvol_misc_006_pos.ksh
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zvol_misc_006_pos.ksh \
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zvol_misc_snapdev.ksh
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173
tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_snapdev.ksh
Executable file
173
tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_snapdev.ksh
Executable file
@ -0,0 +1,173 @@
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#!/bin/ksh -p
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#
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# CDDL HEADER START
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#
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# The contents of this file are subject to the terms of the
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# Common Development and Distribution License (the "License").
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# You may not use this file except in compliance with the License.
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#
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# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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# or http://www.opensolaris.org/os/licensing.
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# See the License for the specific language governing permissions
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# and limitations under the License.
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#
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# When distributing Covered Code, include this CDDL HEADER in each
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# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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# If applicable, add the following below this CDDL HEADER, with the
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# fields enclosed by brackets "[]" replaced with your own identifying
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# information: Portions Copyright [yyyy] [name of copyright owner]
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#
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# CDDL HEADER END
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#
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#
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# Copyright 2017, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
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#
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. $STF_SUITE/include/libtest.shlib
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. $STF_SUITE/tests/functional/cli_root/zfs_set/zfs_set_common.kshlib
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. $STF_SUITE/tests/functional/zvol/zvol_common.shlib
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#
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# DESCRIPTION:
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# Verify that ZFS volume property "snapdev" works as intended.
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#
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# STRATEGY:
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# 1. Verify "snapdev" property does not accept invalid values
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# 2. Verify "snapdev" adds and removes device nodes when updated
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# 3. Verify "snapdev" is inherited correctly
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#
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verify_runnable "global"
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function cleanup
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{
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datasetexists $VOLFS && log_must zfs destroy -r $VOLFS
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datasetexists $ZVOL && log_must zfs destroy -r $ZVOL
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log_must zfs inherit snapdev $TESTPOOL
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block_device_wait
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}
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#
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# Verify $device exists and is a block device
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#
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function blockdev_exists # device
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{
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typeset device="$1"
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# we wait here instead of doing it in a wrapper around 'zfs set snapdev'
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# because there are other commands (zfs snap, zfs inherit, zfs destroy)
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# that can affect device nodes
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block_device_wait
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if [[ ! -b "$device" ]]; then
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log_fail "$device does not exist as a block device"
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fi
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}
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#
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# Verify $device does not exist
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#
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function check_missing # device
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{
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typeset device="$1"
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# we wait here instead of doing it in a wrapper around 'zfs set snapdev'
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# because there are other commands (zfs snap, zfs inherit, zfs destroy)
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# that can affect device nodes
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block_device_wait
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if [[ -e "$device" ]]; then
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log_fail "$device exists when not expected"
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fi
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}
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#
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# Verify $property on $dataset is inherited by $parent and is set to $value
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#
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function verify_inherited # property value dataset parent
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{
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typeset property="$1"
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typeset value="$2"
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typeset dataset="$3"
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typeset parent="$4"
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typeset val=$(get_prop "$property" "$dataset")
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typeset src=$(get_source "$property" "$dataset")
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if [[ "$val" != "$value" || "$src" != "inherited from $parent" ]]
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then
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log_fail "Dataset $dataset did not inherit $property properly:"\
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"expected=$value, value=$val, source=$src."
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fi
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}
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log_assert "Verify that ZFS volume property 'snapdev' works as expected."
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log_onexit cleanup
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VOLFS="$TESTPOOL/volfs"
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ZVOL="$TESTPOOL/vol"
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SNAP="$ZVOL@snap"
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SNAPDEV="${ZVOL_DEVDIR}/$SNAP"
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SUBZVOL="$VOLFS/subvol"
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SUBSNAP="$SUBZVOL@snap"
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SUBSNAPDEV="${ZVOL_DEVDIR}/$SUBSNAP"
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log_must zfs create -o mountpoint=none $VOLFS
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log_must zfs create -V $VOLSIZE -s $ZVOL
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log_must zfs create -V $VOLSIZE -s $SUBZVOL
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# 1. Verify "snapdev" property does not accept invalid values
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typeset badvals=("off" "on" "1" "nope" "-")
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for badval in ${badvals[@]}
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do
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log_mustnot zfs set snapdev="$badval" $ZVOL
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done
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# 2. Verify "snapdev" adds and removes device nodes when updated
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# 2.1 First create a snapshot then change snapdev property
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log_must zfs snapshot $SNAP
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log_must zfs set snapdev=visible $ZVOL
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blockdev_exists $SNAPDEV
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log_must zfs set snapdev=hidden $ZVOL
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check_missing $SNAPDEV
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log_must zfs destroy $SNAP
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# 2.2 First set snapdev property then create a snapshot
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log_must zfs set snapdev=visible $ZVOL
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log_must zfs snapshot $SNAP
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blockdev_exists $SNAPDEV
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log_must zfs destroy $SNAP
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check_missing $SNAPDEV
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# 2.3 Verify setting to the same value multiple times does not lead to issues
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log_must zfs snapshot $SNAP
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log_must zfs set snapdev=visible $ZVOL
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blockdev_exists $SNAPDEV
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log_must zfs set snapdev=visible $ZVOL
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blockdev_exists $SNAPDEV
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log_must zfs set snapdev=hidden $ZVOL
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check_missing $SNAPDEV
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log_must zfs set snapdev=hidden $ZVOL
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check_missing $SNAPDEV
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log_must zfs destroy $SNAP
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# 3. Verify "snapdev" is inherited correctly
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# 3.1 Check snapdev=visible case
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log_must zfs snapshot $SNAP
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log_must zfs inherit snapdev $ZVOL
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log_must zfs set snapdev=visible $TESTPOOL
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verify_inherited 'snapdev' 'visible' $ZVOL $TESTPOOL
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blockdev_exists $SNAPDEV
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# 3.2 Check snapdev=hidden case
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log_must zfs set snapdev=hidden $TESTPOOL
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verify_inherited 'snapdev' 'hidden' $ZVOL $TESTPOOL
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check_missing $SNAPDEV
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# 3.3 Check inheritance on multiple levels
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log_must zfs snapshot $SUBSNAP
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log_must zfs inherit snapdev $SUBZVOL
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log_must zfs set snapdev=hidden $VOLFS
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log_must zfs set snapdev=visible $TESTPOOL
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verify_inherited 'snapdev' 'hidden' $SUBZVOL $VOLFS
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check_missing $SUBSNAPDEV
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blockdev_exists $SNAPDEV
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log_pass "ZFS volume property 'snapdev' works as expected"
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