/*
* CDDL HEADER START
*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2016 by Delphix. All rights reserved.
*/
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
#include <zfs_prop.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_synctask.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dmu_objset.h>
#include <sys/mntent.h>
#include <sys/sunddi.h>
#include <sys/zap.h>
#include <sys/zcp.h>
#include <sys/zcp_iter.h>
#include <sys/zcp_global.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_znode.h>
#include <sys/zvol.h>
#ifdef _KERNEL
#include <sys/zfs_vfsops.h>
#endif
static int
get_objset_type(dsl_dataset_t *ds, zfs_type_t *type)
{
int error;
objset_t *os;
error = dmu_objset_from_ds(ds, &os);
if (error != 0)
return (error);
if (ds->ds_is_snapshot) {
*type = ZFS_TYPE_SNAPSHOT;
} else {
switch (os->os_phys->os_type) {
case DMU_OST_ZFS:
*type = ZFS_TYPE_FILESYSTEM;
break;
case DMU_OST_ZVOL:
*type = ZFS_TYPE_VOLUME;
break;
default:
return (EINVAL);
}
}
return (0);
}
/*
* Returns the string name of ds's type in str (a buffer which should be
* at least 12 bytes long).
*/
static int
get_objset_type_name(dsl_dataset_t *ds, char *str)
{
int error;
zfs_type_t type;
error = get_objset_type(ds, &type);
if (error != 0)
return (error);
switch (type) {
case ZFS_TYPE_SNAPSHOT:
(void) strcpy(str, "snapshot");
break;
case ZFS_TYPE_FILESYSTEM:
(void) strcpy(str, "filesystem");
break;
case ZFS_TYPE_VOLUME:
(void) strcpy(str, "volume");
break;
default:
return (EINVAL);
}
return (0);
}
/*
* Determines the source of a property given its setpoint and
* property type. It pushes the source to the lua stack.
*/
static void
get_prop_src(lua_State *state, const char *setpoint, zfs_prop_t prop)
{
if (zfs_prop_readonly(prop) || (prop == ZFS_PROP_VERSION)) {
lua_pushnil(state);
} else {
const char *src;
if (strcmp("", setpoint) == 0) {
src = "default";
} else {
src = setpoint;
}
(void) lua_pushstring(state, src);
}
}
/*
* Given an error encountered while getting properties, either longjmp's for
* a fatal error or pushes nothing to the stack for a non fatal one.
*/
static int
zcp_handle_error(lua_State *state, const char *dataset_name,
const char *property_name, int error)
{
ASSERT3S(error, !=, 0);
if (error == ENOENT) {
return (0);
} else if (error == EINVAL) {
return (luaL_error(state,
"property '%s' is not a valid property on dataset '%s'",
property_name, dataset_name));
} else if (error == EIO) {
return (luaL_error(state,
"I/O error while retrieving property '%s' on dataset '%s'",
property_name, dataset_name));
} else {
return (luaL_error(state, "unexpected error %d while "
"retrieving property '%s' on dataset '%s'",
error, property_name, dataset_name));
}
}
/*
* Look up a user defined property in the zap object. If it exists, push it
* and the setpoint onto the stack, otherwise don't push anything.
*/
static int
zcp_get_user_prop(lua_State *state, dsl_pool_t *dp, const char *dataset_name,
const char *property_name)
{
int error;
char *buf;
char setpoint[ZFS_MAX_DATASET_NAME_LEN];
/*
* zcp_dataset_hold will either successfully return the requested
* dataset or throw a lua error and longjmp out of the zfs.get_prop call
* without returning.
*/
dsl_dataset_t *ds = zcp_dataset_hold(state, dp, dataset_name, FTAG);
if (ds == NULL)
return (1); /* not reached; zcp_dataset_hold() longjmp'd */
buf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
error = dsl_prop_get_ds(ds, property_name, 1, ZAP_MAXVALUELEN,
buf, setpoint);
dsl_dataset_rele(ds, FTAG);
if (error != 0) {
kmem_free(buf, ZAP_MAXVALUELEN);
return (zcp_handle_error(state, dataset_name, property_name,
error));
}
(void) lua_pushstring(state, buf);
(void) lua_pushstring(state, setpoint);
kmem_free(buf, ZAP_MAXVALUELEN);
return (2);
}
/*
* Check if the property we're looking for is stored in the ds_dir. If so,
* return it in the 'val' argument. Return 0 on success and ENOENT and if
* the property is not present.
*/
static int
get_dsl_dir_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop,
uint64_t *val)
{
dsl_dir_t *dd = ds->ds_dir;
mutex_enter(&dd->dd_lock);
switch (zfs_prop) {
case ZFS_PROP_USEDSNAP:
*val = dsl_dir_get_usedsnap(dd);
break;
case ZFS_PROP_USEDCHILD:
*val = dsl_dir_get_usedchild(dd);
break;
case ZFS_PROP_USEDDS:
*val = dsl_dir_get_usedds(dd);
break;
case ZFS_PROP_USEDREFRESERV:
*val = dsl_dir_get_usedrefreserv(dd);
break;
case ZFS_PROP_LOGICALUSED:
*val = dsl_dir_get_logicalused(dd);
break;
default:
mutex_exit(&dd->dd_lock);
return (ENOENT);
}
mutex_exit(&dd->dd_lock);
return (0);
}
/*
* Takes a dataset, a property, a value and that value's setpoint as
* found in the ZAP. Checks if the property has been changed in the vfs.
* If so, val and setpoint will be overwritten with updated content.
* Otherwise, they are left unchanged.
*/
static int
get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val,
char *setpoint)
{
#ifndef _KERNEL
return (0);
#else
int error;
#ifdef illumos
zfsvfs_t *zfvp;
#endif
vfs_t *vfsp;
objset_t *os;
uint64_t tmp = *val;
error = dmu_objset_from_ds(ds, &os);
if (error != 0)
return (error);
error = getzfsvfs_impl(os, &vfsp);
if (error != 0)
return (error);
#ifdef illumos
vfsp = zfvp->z_vfs;
#endif
switch (zfs_prop) {
case ZFS_PROP_ATIME:
if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL))
tmp = 1;
break;
case ZFS_PROP_DEVICES:
if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL))
tmp = 1;
break;
case ZFS_PROP_EXEC:
if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL))
tmp = 1;
break;
case ZFS_PROP_SETUID:
if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL))
tmp = 1;
break;
case ZFS_PROP_READONLY:
if (vfs_optionisset(vfsp, MNTOPT_RW, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_RO, NULL))
tmp = 1;
break;
case ZFS_PROP_XATTR:
if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL))
tmp = 1;
break;
case ZFS_PROP_NBMAND:
if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL))
tmp = 0;
if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL))
tmp = 1;
break;
default:
#ifdef illumos
VFS_RELE(vfsp);
#else
vfs_rel(vfsp);
#endif
return (ENOENT);
}
#ifdef illumos
VFS_RELE(vfsp);
#else
vfs_rel(vfsp);
#endif
if (tmp != *val) {
(void) strcpy(setpoint, "temporary");
*val = tmp;
}
return (0);
#endif
}
/*
* Check if the property we're looking for is stored at the dsl_dataset or
* dsl_dir level. If so, push the property value and source onto the lua stack
* and return 0. If it is not present or a failure occurs in lookup, return a
* non-zero error value.
*/
static int
get_special_prop(lua_State *state, dsl_dataset_t *ds, const char *dsname,
zfs_prop_t zfs_prop)
{
int error = 0;
objset_t *os;
uint64_t numval;
char *strval = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
char setpoint[ZFS_MAX_DATASET_NAME_LEN] =
"Internal error - setpoint not determined";
zfs_type_t ds_type;
zprop_type_t prop_type = zfs_prop_get_type(zfs_prop);
(void) get_objset_type(ds, &ds_type);
switch (zfs_prop) {
case ZFS_PROP_REFRATIO:
numval = dsl_get_refratio(ds);
break;
case ZFS_PROP_USED:
numval = dsl_get_used(ds);
break;
case ZFS_PROP_CLONES: {
nvlist_t *clones = fnvlist_alloc();
error = get_clones_stat_impl(ds, clones);
if (error == 0) {
/* push list to lua stack */
VERIFY0(zcp_nvlist_to_lua(state, clones, NULL, 0));
/* source */
(void) lua_pushnil(state);
}
nvlist_free(clones);
kmem_free(strval, ZAP_MAXVALUELEN);
return (error);
}
case ZFS_PROP_COMPRESSRATIO:
numval = dsl_get_compressratio(ds);
break;
case ZFS_PROP_CREATION:
numval = dsl_get_creation(ds);
break;
case ZFS_PROP_REFERENCED:
numval = dsl_get_referenced(ds);
break;
case ZFS_PROP_AVAILABLE:
numval = dsl_get_available(ds);
break;
case ZFS_PROP_LOGICALREFERENCED:
numval = dsl_get_logicalreferenced(ds);
break;
case ZFS_PROP_CREATETXG:
numval = dsl_get_creationtxg(ds);
break;
case ZFS_PROP_GUID:
numval = dsl_get_guid(ds);
break;
case ZFS_PROP_UNIQUE:
numval = dsl_get_unique(ds);
break;
case ZFS_PROP_OBJSETID:
numval = dsl_get_objsetid(ds);
break;
case ZFS_PROP_ORIGIN:
dsl_dir_get_origin(ds->ds_dir, strval);
break;
case ZFS_PROP_USERACCOUNTING:
error = dmu_objset_from_ds(ds, &os);
if (error == 0)
numval = dmu_objset_userspace_present(os);
break;
case ZFS_PROP_WRITTEN:
error = dsl_get_written(ds, &numval);
break;
case ZFS_PROP_TYPE:
error = get_objset_type_name(ds, strval);
break;
case ZFS_PROP_PREV_SNAP:
error = dsl_get_prev_snap(ds, strval);
break;
case ZFS_PROP_NAME:
dsl_dataset_name(ds, strval);
break;
case ZFS_PROP_MOUNTPOINT:
error = dsl_get_mountpoint(ds, dsname, strval, setpoint);
break;
case ZFS_PROP_VERSION:
/* should be a snapshot or filesystem */
ASSERT(ds_type != ZFS_TYPE_VOLUME);
error = dmu_objset_from_ds(ds, &os);
/* look in the master node for the version */
if (error == 0) {
error = zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
sizeof (numval), 1, &numval);
}
break;
case ZFS_PROP_DEFER_DESTROY:
numval = dsl_get_defer_destroy(ds);
break;
case ZFS_PROP_USERREFS:
numval = dsl_get_userrefs(ds);
break;
case ZFS_PROP_FILESYSTEM_COUNT:
error = dsl_dir_get_filesystem_count(ds->ds_dir, &numval);
(void) strcpy(setpoint, "");
break;
case ZFS_PROP_SNAPSHOT_COUNT:
error = dsl_dir_get_snapshot_count(ds->ds_dir, &numval);
(void) strcpy(setpoint, "");
break;
case ZFS_PROP_REMAPTXG:
error = dsl_dir_get_remaptxg(ds->ds_dir, &numval);
break;
case ZFS_PROP_NUMCLONES:
numval = dsl_get_numclones(ds);
break;
case ZFS_PROP_INCONSISTENT:
numval = dsl_get_inconsistent(ds);
break;
case ZFS_PROP_RECEIVE_RESUME_TOKEN:
VERIFY3U(strlcpy(strval, get_receive_resume_stats_impl(ds),
ZAP_MAXVALUELEN), <, ZAP_MAXVALUELEN);
if (strcmp(strval, "") == 0) {
VERIFY3U(strlcpy(strval, get_child_receive_stats(ds),
ZAP_MAXVALUELEN), <, ZAP_MAXVALUELEN);
if (strcmp(strval, "") == 0)
error = ENOENT;
}
break;
case ZFS_PROP_VOLSIZE:
ASSERT(ds_type == ZFS_TYPE_VOLUME);
error = dmu_objset_from_ds(ds, &os);
if (error == 0) {
error = zap_lookup(os, ZVOL_ZAP_OBJ, "size",
sizeof (numval), 1, &numval);
}
if (error == 0)
(void) strcpy(setpoint, dsname);
break;
case ZFS_PROP_VOLBLOCKSIZE: {
ASSERT(ds_type == ZFS_TYPE_VOLUME);
dmu_object_info_t doi;
error = dmu_objset_from_ds(ds, &os);
if (error == 0) {
error = dmu_object_info(os, ZVOL_OBJ, &doi);
if (error == 0)
numval = doi.doi_data_block_size;
}
break;
}
default:
/* Did not match these props, check in the dsl_dir */
error = get_dsl_dir_prop(ds, zfs_prop, &numval);
}
if (error != 0) {
kmem_free(strval, ZAP_MAXVALUELEN);
return (error);
}
switch (prop_type) {
case PROP_TYPE_NUMBER: {
(void) lua_pushnumber(state, numval);
break;
}
case PROP_TYPE_STRING: {
(void) lua_pushstring(state, strval);
break;
}
case PROP_TYPE_INDEX: {
const char *propval;
error = zfs_prop_index_to_string(zfs_prop, numval, &propval);
if (error != 0) {
kmem_free(strval, ZAP_MAXVALUELEN);
return (error);
}
(void) lua_pushstring(state, propval);
break;
}
}
kmem_free(strval, ZAP_MAXVALUELEN);
/* Push the source to the stack */
get_prop_src(state, setpoint, zfs_prop);
return (0);
}
/*
* Look up a property and its source in the zap object. If the value is
* present and successfully retrieved, push the value and source on the
* lua stack and return 0. On failure, return a non-zero error value.
*/
static int
get_zap_prop(lua_State *state, dsl_dataset_t *ds, zfs_prop_t zfs_prop)
{
int error = 0;
char setpoint[ZFS_MAX_DATASET_NAME_LEN];
char *strval = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
uint64_t numval;
const char *prop_name = zfs_prop_to_name(zfs_prop);
zprop_type_t prop_type = zfs_prop_get_type(zfs_prop);
if (prop_type == PROP_TYPE_STRING) {
/* Push value to lua stack */
error = dsl_prop_get_ds(ds, prop_name, 1,
ZAP_MAXVALUELEN, strval, setpoint);
if (error == 0)
(void) lua_pushstring(state, strval);
} else {
error = dsl_prop_get_ds(ds, prop_name, sizeof (numval),
1, &numval, setpoint);
/* Fill in temorary value for prop, if applicable */
(void) get_temporary_prop(ds, zfs_prop, &numval, setpoint);
/* Push value to lua stack */
if (prop_type == PROP_TYPE_INDEX) {
const char *propval;
error = zfs_prop_index_to_string(zfs_prop, numval,
&propval);
if (error == 0)
(void) lua_pushstring(state, propval);
} else {
if (error == 0)
(void) lua_pushnumber(state, numval);
}
}
kmem_free(strval, ZAP_MAXVALUELEN);
if (error == 0)
get_prop_src(state, setpoint, zfs_prop);
return (error);
}
/*
* Determine whether property is valid for a given dataset
*/
boolean_t
prop_valid_for_ds(dsl_dataset_t *ds, zfs_prop_t zfs_prop)
{
int error;
zfs_type_t zfs_type;
/* properties not supported */
if ((zfs_prop == ZFS_PROP_ISCSIOPTIONS) ||
(zfs_prop == ZFS_PROP_MOUNTED))
return (B_FALSE);
/* if we want the origin prop, ds must be a clone */
if ((zfs_prop == ZFS_PROP_ORIGIN) && (!dsl_dir_is_clone(ds->ds_dir)))
return (B_FALSE);
error = get_objset_type(ds, &zfs_type);
if (error != 0)
return (B_FALSE);
return (zfs_prop_valid_for_type(zfs_prop, zfs_type));
}
/*
* Look up a given dataset property. On success return 2, the number of
* values pushed to the lua stack (property value and source). On a fatal
* error, longjmp. On a non fatal error push nothing.
*/
static int
zcp_get_system_prop(lua_State *state, dsl_pool_t *dp, const char *dataset_name,
zfs_prop_t zfs_prop)
{
int error;
/*
* zcp_dataset_hold will either successfully return the requested
* dataset or throw a lua error and longjmp out of the zfs.get_prop call
* without returning.
*/
dsl_dataset_t *ds = zcp_dataset_hold(state, dp, dataset_name, FTAG);
if (ds == NULL)
return (1); /* not reached; zcp_dataset_hold() longjmp'd */
/* Check that the property is valid for the given dataset */
const char *prop_name = zfs_prop_to_name(zfs_prop);
if (!prop_valid_for_ds(ds, zfs_prop)) {
dsl_dataset_rele(ds, FTAG);
return (0);
}
/* Check if the property can be accessed directly */
error = get_special_prop(state, ds, dataset_name, zfs_prop);
if (error == 0) {
dsl_dataset_rele(ds, FTAG);
/* The value and source have been pushed by get_special_prop */
return (2);
}
if (error != ENOENT) {
dsl_dataset_rele(ds, FTAG);
return (zcp_handle_error(state, dataset_name,
prop_name, error));
}
/* If we were unable to find it, look in the zap object */
error = get_zap_prop(state, ds, zfs_prop);
dsl_dataset_rele(ds, FTAG);
if (error != 0) {
return (zcp_handle_error(state, dataset_name,
prop_name, error));
}
/* The value and source have been pushed by get_zap_prop */
return (2);
}
static zfs_userquota_prop_t
get_userquota_prop(const char *prop_name)
{
zfs_userquota_prop_t type;
/* Figure out the property type ({user|group}{quota|used}) */
for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
if (strncmp(prop_name, zfs_userquota_prop_prefixes[type],
strlen(zfs_userquota_prop_prefixes[type])) == 0)
break;
}
return (type);
}
#ifdef _KERNEL
/*
* Given the name of a zfs_userquota_prop, this function determines the
* prop type as well as the numeric group/user ids based on the string
* following the '@' in the property name. On success, returns 0. On failure,
* returns a non-zero error.
* 'domain' must be free'd by caller using strfree()
*/
static int
parse_userquota_prop(const char *prop_name, zfs_userquota_prop_t *type,
char **domain, uint64_t *rid)
{
char *cp, *end, *domain_val;
*type = get_userquota_prop(prop_name);
if (*type >= ZFS_NUM_USERQUOTA_PROPS)
return (EINVAL);
*rid = 0;
cp = strchr(prop_name, '@') + 1;
if (strncmp(cp, "S-1-", 4) == 0) {
/*
* It's a numeric SID (eg "S-1-234-567-89") and we want to
* seperate the domain id and the rid
*/
int domain_len = strrchr(cp, '-') - cp;
domain_val = kmem_alloc(domain_len + 1, KM_SLEEP);
(void) strncpy(domain_val, cp, domain_len);
domain_val[domain_len] = '\0';
cp += domain_len + 1;
(void) ddi_strtoll(cp, &end, 10, (longlong_t *)rid);
if (*end != '\0') {
strfree(domain_val);
return (EINVAL);
}
} else {
/* It's only a user/group ID (eg "12345"), just get the rid */
domain_val = NULL;
(void) ddi_strtoll(cp, &end, 10, (longlong_t *)rid);
if (*end != '\0')
return (EINVAL);
}
*domain = domain_val;
return (0);
}
/*
* Look up {user|group}{quota|used} property for given dataset. On success
* push the value (quota or used amount) and the setpoint. On failure, push
* a lua error.
*/
static int
zcp_get_userquota_prop(lua_State *state, dsl_pool_t *dp,
const char *dataset_name, const char *prop_name)
{
zfsvfs_t *zfvp;
zfsvfs_t *zfsvfs;
int error;
zfs_userquota_prop_t type;
char *domain;
uint64_t rid, value;
objset_t *os;
dsl_dataset_t *ds = zcp_dataset_hold(state, dp, dataset_name, FTAG);
if (ds == NULL)
return (1); /* not reached; zcp_dataset_hold() longjmp'd */
error = parse_userquota_prop(prop_name, &type, &domain, &rid);
if (error == 0) {
error = dmu_objset_from_ds(ds, &os);
if (error == 0) {
zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
error = zfsvfs_create_impl(&zfvp, zfsvfs, os);
if (error == 0) {
error = zfs_userspace_one(zfvp, type, domain,
rid, &value);
zfsvfs_free(zfvp);
}
}
if (domain != NULL)
strfree(domain);
}
dsl_dataset_rele(ds, FTAG);
if ((value == 0) && ((type == ZFS_PROP_USERQUOTA) ||
(type == ZFS_PROP_GROUPQUOTA)))
error = ENOENT;
if (error != 0) {
return (zcp_handle_error(state, dataset_name,
prop_name, error));
}
(void) lua_pushnumber(state, value);
(void) lua_pushstring(state, dataset_name);
return (2);
}
#endif
/*
* Determines the name of the snapshot referenced in the written property
* name. Returns snapshot name in snap_name, a buffer that must be at least
* as large as ZFS_MAX_DATASET_NAME_LEN
*/
static void
parse_written_prop(const char *dataset_name, const char *prop_name,
char *snap_name)
{
ASSERT(zfs_prop_written(prop_name));
const char *name = prop_name + ZFS_WRITTEN_PROP_PREFIX_LEN;
if (strchr(name, '@') == NULL) {
(void) sprintf(snap_name, "%s@%s", dataset_name, name);
} else {
(void) strcpy(snap_name, name);
}
}
/*
* Look up written@ property for given dataset. On success
* push the value and the setpoint. If error is fatal, we will
* longjmp, otherwise push nothing.
*/
static int
zcp_get_written_prop(lua_State *state, dsl_pool_t *dp,
const char *dataset_name, const char *prop_name)
{
char snap_name[ZFS_MAX_DATASET_NAME_LEN];
uint64_t used, comp, uncomp;
dsl_dataset_t *old;
int error = 0;
parse_written_prop(dataset_name, prop_name, snap_name);
dsl_dataset_t *new = zcp_dataset_hold(state, dp, dataset_name, FTAG);
if (new == NULL)
return (1); /* not reached; zcp_dataset_hold() longjmp'd */
error = dsl_dataset_hold(dp, snap_name, FTAG, &old);
if (error != 0) {
dsl_dataset_rele(new, FTAG);
return (zcp_dataset_hold_error(state, dp, snap_name,
error));
}
error = dsl_dataset_space_written(old, new,
&used, &comp, &uncomp);
dsl_dataset_rele(old, FTAG);
dsl_dataset_rele(new, FTAG);
if (error != 0) {
return (zcp_handle_error(state, dataset_name,
snap_name, error));
}
(void) lua_pushnumber(state, used);
(void) lua_pushstring(state, dataset_name);
return (2);
}
static int zcp_get_prop(lua_State *state);
static zcp_lib_info_t zcp_get_prop_info = {
.name = "get_prop",
.func = zcp_get_prop,
.pargs = {
{ .za_name = "dataset", .za_lua_type = LUA_TSTRING},
{ .za_name = "property", .za_lua_type = LUA_TSTRING},
{NULL, 0}
},
.kwargs = {
{NULL, 0}
}
};
static int
zcp_get_prop(lua_State *state)
{
const char *dataset_name;
const char *property_name;
dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
zcp_lib_info_t *libinfo = &zcp_get_prop_info;
zcp_parse_args(state, libinfo->name, libinfo->pargs, libinfo->kwargs);
dataset_name = lua_tostring(state, 1);
property_name = lua_tostring(state, 2);
/* User defined property */
if (zfs_prop_user(property_name)) {
return (zcp_get_user_prop(state, dp,
dataset_name, property_name));
}
/* userspace property */
if (zfs_prop_userquota(property_name)) {
#ifdef _KERNEL
return (zcp_get_userquota_prop(state, dp,
dataset_name, property_name));
#else
return (luaL_error(state,
"user quota properties only supported in kernel mode",
property_name));
#endif
}
/* written@ property */
if (zfs_prop_written(property_name)) {
return (zcp_get_written_prop(state, dp,
dataset_name, property_name));
}
zfs_prop_t zfs_prop = zfs_name_to_prop(property_name);
/* Valid system property */
if (zfs_prop != ZPROP_INVAL) {
return (zcp_get_system_prop(state, dp, dataset_name,
zfs_prop));
}
/* Invalid property name */
return (luaL_error(state,
"'%s' is not a valid property", property_name));
}
int
zcp_load_get_lib(lua_State *state)
{
lua_pushcclosure(state, zcp_get_prop_info.func, 0);
lua_setfield(state, -2, zcp_get_prop_info.name);
return (1);
}