static void
dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
{
dmu_objset_create_arg_t *doca = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
dsl_dir_t *pdd;
const char *tail;
dsl_dataset_t *ds;
uint64_t obj;
blkptr_t *bp;
objset_t *os;
VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
doca->doca_cred, tx);
VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
bp = dsl_dataset_get_blkptr(ds);
os = dmu_objset_create_impl(pdd->dd_pool->dp_spa,
ds, bp, doca->doca_type, tx);
if (doca->doca_userfunc != NULL) {
doca->doca_userfunc(os, doca->doca_userarg,
doca->doca_cred, tx);
}
spa_history_log_internal_ds(ds, "create", tx, "");
dsl_dataset_rele(ds, FTAG);
dsl_dir_rele(pdd, FTAG);
}
static void
dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
{
dmu_objset_clone_arg_t *doca = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
dsl_dir_t *pdd;
const char *tail;
dsl_dataset_t *origin, *ds;
uint64_t obj;
char namebuf[MAXNAMELEN];
VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
doca->doca_cred, tx);
VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
dsl_dataset_name(origin, namebuf);
spa_history_log_internal_ds(ds, "clone", tx,
"origin=%s (%llu)", namebuf, origin->ds_object);
dsl_dataset_rele(ds, FTAG);
dsl_dataset_rele(origin, FTAG);
dsl_dir_rele(pdd, FTAG);
}
/*ARGSUSED*/
static int
dmu_objset_create_check(void *arg, dmu_tx_t *tx)
{
dmu_objset_create_arg_t *doca = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
dsl_dir_t *pdd;
const char *tail;
int error;
if (strchr(doca->doca_name, '@') != NULL)
return (SET_ERROR(EINVAL));
error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
if (error != 0)
return (error);
if (tail == NULL) {
dsl_dir_rele(pdd, FTAG);
return (SET_ERROR(EEXIST));
}
error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
doca->doca_cred);
dsl_dir_rele(pdd, FTAG);
return (error);
}
static void
dsl_deleg_unset_sync(void *arg, dmu_tx_t *tx)
{
dsl_deleg_arg_t *dda = arg;
dsl_dir_t *dd;
dsl_pool_t *dp = dmu_tx_pool(tx);
objset_t *mos = dp->dp_meta_objset;
nvpair_t *whopair = NULL;
uint64_t zapobj;
VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL));
zapobj = dd->dd_phys->dd_deleg_zapobj;
if (zapobj == 0) {
dsl_dir_rele(dd, FTAG);
return;
}
while ((whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair))) {
const char *whokey = nvpair_name(whopair);
nvlist_t *perms;
nvpair_t *permpair = NULL;
uint64_t jumpobj;
if (nvpair_value_nvlist(whopair, &perms) != 0) {
if (zap_lookup(mos, zapobj, whokey, 8,
1, &jumpobj) == 0) {
(void) zap_remove(mos, zapobj, whokey, tx);
VERIFY(0 == zap_destroy(mos, jumpobj, tx));
}
spa_history_log_internal_dd(dd, "permission who remove",
tx, "%s", whokey);
continue;
}
if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0)
continue;
while ((permpair = nvlist_next_nvpair(perms, permpair))) {
const char *perm = nvpair_name(permpair);
uint64_t n = 0;
(void) zap_remove(mos, jumpobj, perm, tx);
if (zap_count(mos, jumpobj, &n) == 0 && n == 0) {
(void) zap_remove(mos, zapobj,
whokey, tx);
VERIFY(0 == zap_destroy(mos,
jumpobj, tx));
}
spa_history_log_internal_dd(dd, "permission remove", tx,
"%s %s", whokey, perm);
}
}
dsl_dir_rele(dd, FTAG);
}
/*ARGSUSED*/
static int
dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
{
dmu_objset_clone_arg_t *doca = arg;
dsl_dir_t *pdd;
const char *tail;
int error;
dsl_dataset_t *origin;
dsl_pool_t *dp = dmu_tx_pool(tx);
if (strchr(doca->doca_clone, '@') != NULL)
return (SET_ERROR(EINVAL));
error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
if (error != 0)
return (error);
if (tail == NULL) {
dsl_dir_rele(pdd, FTAG);
return (SET_ERROR(EEXIST));
}
/* You can't clone across pools. */
if (pdd->dd_pool != dp) {
dsl_dir_rele(pdd, FTAG);
return (SET_ERROR(EXDEV));
}
error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
doca->doca_cred);
if (error != 0) {
dsl_dir_rele(pdd, FTAG);
return (SET_ERROR(EDQUOT));
}
dsl_dir_rele(pdd, FTAG);
error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
if (error != 0)
return (error);
/* You can't clone across pools. */
if (origin->ds_dir->dd_pool != dp) {
dsl_dataset_rele(origin, FTAG);
return (SET_ERROR(EXDEV));
}
/* You can only clone snapshots, not the head datasets. */
if (!dsl_dataset_is_snapshot(origin)) {
dsl_dataset_rele(origin, FTAG);
return (SET_ERROR(EINVAL));
}
dsl_dataset_rele(origin, FTAG);
return (0);
}
/*
* Traverse all child snapshot datasets and apply snapdev appropriately.
*/
static void
zvol_set_snapdev_sync(void *arg, dmu_tx_t *tx)
{
zvol_set_snapdev_arg_t *zsda = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
dsl_dir_t *dd;
VERIFY0(dsl_dir_hold(dp, zsda->zsda_name, FTAG, &dd, NULL));
zsda->zsda_tx = tx;
dmu_objset_find_dp(dp, dd->dd_object, zvol_set_snapdev_sync_cb,
zsda, DS_FIND_CHILDREN);
dsl_dir_rele(dd, FTAG);
}
/*
* Sanity check the dataset for safe use by the sync task. No additional
* conditions are imposed.
*/
static int
zvol_set_snapdev_check(void *arg, dmu_tx_t *tx)
{
zvol_set_snapdev_arg_t *zsda = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
dsl_dir_t *dd;
int error;
error = dsl_dir_hold(dp, zsda->zsda_name, FTAG, &dd, NULL);
if (error != 0)
return (error);
dsl_dir_rele(dd, FTAG);
return (error);
}
static int
dsl_deleg_check(void *arg, dmu_tx_t *tx)
{
dsl_deleg_arg_t *dda = arg;
dsl_dir_t *dd;
int error;
if (spa_version(dmu_tx_pool(tx)->dp_spa) <
SPA_VERSION_DELEGATED_PERMS) {
return (SET_ERROR(ENOTSUP));
}
error = dsl_dir_hold(dmu_tx_pool(tx), dda->dda_name, FTAG, &dd, NULL);
if (error == 0)
dsl_dir_rele(dd, FTAG);
return (error);
}
static void
dsl_deleg_set_sync(void *arg, dmu_tx_t *tx)
{
dsl_deleg_arg_t *dda = arg;
dsl_dir_t *dd;
dsl_pool_t *dp = dmu_tx_pool(tx);
objset_t *mos = dp->dp_meta_objset;
nvpair_t *whopair = NULL;
uint64_t zapobj;
VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL));
zapobj = dd->dd_phys->dd_deleg_zapobj;
if (zapobj == 0) {
dmu_buf_will_dirty(dd->dd_dbuf, tx);
zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
}
while ((whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair))) {
const char *whokey = nvpair_name(whopair);
nvlist_t *perms;
nvpair_t *permpair = NULL;
uint64_t jumpobj;
perms = fnvpair_value_nvlist(whopair);
if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) {
jumpobj = zap_create_link(mos, DMU_OT_DSL_PERMS,
zapobj, whokey, tx);
}
while ((permpair = nvlist_next_nvpair(perms, permpair))) {
const char *perm = nvpair_name(permpair);
uint64_t n = 0;
VERIFY(zap_update(mos, jumpobj,
perm, 8, 1, &n, tx) == 0);
spa_history_log_internal_dd(dd, "permission update", tx,
"%s %s", whokey, perm);
}
}
dsl_dir_rele(dd, FTAG);
}
/*
* Find all 'allow' permissions from a given point and then continue
* traversing up to the root.
*
* This function constructs an nvlist of nvlists.
* each setpoint is an nvlist composed of an nvlist of an nvlist
* of the individual * users/groups/everyone/create
* permissions.
*
* The nvlist will look like this.
*
* { source fsname -> { whokeys { permissions,...}, ...}}
*
* The fsname nvpairs will be arranged in a bottom up order. For example,
* if we have the following structure a/b/c then the nvpairs for the fsnames
* will be ordered a/b/c, a/b, a.
*/
int
dsl_deleg_get(const char *ddname, nvlist_t **nvp)
{
dsl_dir_t *dd, *startdd;
dsl_pool_t *dp;
int error;
objset_t *mos;
zap_cursor_t *basezc, *zc;
zap_attribute_t *baseza, *za;
char *source;
error = dsl_pool_hold(ddname, FTAG, &dp);
if (error != 0)
return (error);
error = dsl_dir_hold(dp, ddname, FTAG, &startdd, NULL);
if (error != 0) {
dsl_pool_rele(dp, FTAG);
return (error);
}
dp = startdd->dd_pool;
mos = dp->dp_meta_objset;
zc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP);
za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
basezc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP);
baseza = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
source = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, KM_SLEEP);
VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
for (dd = startdd; dd != NULL; dd = dd->dd_parent) {
nvlist_t *sp_nvp;
uint64_t n;
if (dd->dd_phys->dd_deleg_zapobj == 0 ||
zap_count(mos, dd->dd_phys->dd_deleg_zapobj, &n) != 0 ||
n == 0)
continue;
sp_nvp = fnvlist_alloc();
for (zap_cursor_init(basezc, mos,
dd->dd_phys->dd_deleg_zapobj);
zap_cursor_retrieve(basezc, baseza) == 0;
zap_cursor_advance(basezc)) {
nvlist_t *perms_nvp;
ASSERT(baseza->za_integer_length == 8);
ASSERT(baseza->za_num_integers == 1);
perms_nvp = fnvlist_alloc();
for (zap_cursor_init(zc, mos, baseza->za_first_integer);
zap_cursor_retrieve(zc, za) == 0;
zap_cursor_advance(zc)) {
fnvlist_add_boolean(perms_nvp, za->za_name);
}
zap_cursor_fini(zc);
fnvlist_add_nvlist(sp_nvp, baseza->za_name, perms_nvp);
fnvlist_free(perms_nvp);
}
zap_cursor_fini(basezc);
dsl_dir_name(dd, source);
fnvlist_add_nvlist(*nvp, source, sp_nvp);
nvlist_free(sp_nvp);
}
kmem_free(source, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
kmem_free(baseza, sizeof (zap_attribute_t));
kmem_free(basezc, sizeof (zap_cursor_t));
kmem_free(za, sizeof (zap_attribute_t));
kmem_free(zc, sizeof (zap_cursor_t));
dsl_dir_rele(startdd, FTAG);
dsl_pool_rele(dp, FTAG);
return (0);
}
/*
* Find all 'allow' permissions from a given point and then continue
* traversing up to the root.
*
* This function constructs an nvlist of nvlists.
* each setpoint is an nvlist composed of an nvlist of an nvlist
* of the individual * users/groups/everyone/create
* permissions.
*
* The nvlist will look like this.
*
* { source fsname -> { whokeys { permissions,...}, ...}}
*
* The fsname nvpairs will be arranged in a bottom up order. For example,
* if we have the following structure a/b/c then the nvpairs for the fsnames
* will be ordered a/b/c, a/b, a.
*/
int
dsl_deleg_get(const char *ddname, nvlist_t **nvp)
{
dsl_dir_t *dd, *startdd;
dsl_pool_t *dp;
int error;
objset_t *mos;
error = dsl_pool_hold(ddname, FTAG, &dp);
if (error != 0)
return (error);
error = dsl_dir_hold(dp, ddname, FTAG, &startdd, NULL);
if (error != 0) {
dsl_pool_rele(dp, FTAG);
return (error);
}
dp = startdd->dd_pool;
mos = dp->dp_meta_objset;
VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
for (dd = startdd; dd != NULL; dd = dd->dd_parent) {
zap_cursor_t basezc;
zap_attribute_t baseza;
nvlist_t *sp_nvp;
uint64_t n;
char source[ZFS_MAX_DATASET_NAME_LEN];
if (dsl_dir_phys(dd)->dd_deleg_zapobj == 0 ||
zap_count(mos,
dsl_dir_phys(dd)->dd_deleg_zapobj, &n) != 0 || n == 0)
continue;
sp_nvp = fnvlist_alloc();
for (zap_cursor_init(&basezc, mos,
dsl_dir_phys(dd)->dd_deleg_zapobj);
zap_cursor_retrieve(&basezc, &baseza) == 0;
zap_cursor_advance(&basezc)) {
zap_cursor_t zc;
zap_attribute_t za;
nvlist_t *perms_nvp;
ASSERT(baseza.za_integer_length == 8);
ASSERT(baseza.za_num_integers == 1);
perms_nvp = fnvlist_alloc();
for (zap_cursor_init(&zc, mos, baseza.za_first_integer);
zap_cursor_retrieve(&zc, &za) == 0;
zap_cursor_advance(&zc)) {
fnvlist_add_boolean(perms_nvp, za.za_name);
}
zap_cursor_fini(&zc);
fnvlist_add_nvlist(sp_nvp, baseza.za_name, perms_nvp);
fnvlist_free(perms_nvp);
}
zap_cursor_fini(&basezc);
dsl_dir_name(dd, source);
fnvlist_add_nvlist(*nvp, source, sp_nvp);
nvlist_free(sp_nvp);
}
dsl_dir_rele(startdd, FTAG);
dsl_pool_rele(dp, FTAG);
return (0);
}
