int
fmd_fmri_replaced(nvlist_t *nvl)
{
uint64_t pool_guid, vdev_guid;
cbdata_t cb;
int ret;
(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
cb.cb_guid = pool_guid;
cb.cb_pool = NULL;
if (zpool_iter(g_zfs, find_pool, &cb) != 1)
return (FMD_OBJ_STATE_NOT_PRESENT);
if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {
zpool_close(cb.cb_pool);
return (FMD_OBJ_STATE_STILL_PRESENT);
}
ret = (find_vdev(cb.cb_pool, vdev_guid) != NULL) ?
FMD_OBJ_STATE_STILL_PRESENT : FMD_OBJ_STATE_NOT_PRESENT;
zpool_close(cb.cb_pool);
return (ret);
}
int
fmd_fmri_present(nvlist_t *nvl)
{
uint64_t pool_guid, vdev_guid;
cbdata_t cb;
int ret;
(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
cb.cb_guid = pool_guid;
cb.cb_pool = NULL;
if (zpool_iter(g_zfs, find_pool, &cb) != 1)
return (0);
if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {
zpool_close(cb.cb_pool);
return (1);
}
ret = (find_vdev(cb.cb_pool, vdev_guid) != NULL);
zpool_close(cb.cb_pool);
return (ret);
}
int
zfs_deliver_dle(nvlist_t *nvl)
{
char *devname;
if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devname) != 0) {
syseventd_print(9, "zfs_deliver_event: no physpath\n");
return (-1);
}
if (strncmp(devname, DEVICE_PREFIX, strlen(DEVICE_PREFIX)) != 0) {
syseventd_print(9, "zfs_deliver_event: invalid "
"device '%s'", devname);
return (-1);
}
/*
* We try to find the device using the physical
* path that has been supplied. We need to strip off
* the /devices prefix before starting our search.
*/
devname += strlen(DEVICE_PREFIX);
if (zpool_iter(g_zfshdl, zfsdle_vdev_online, devname) != 1) {
syseventd_print(9, "zfs_deliver_event: device '%s' not"
" found\n", devname);
return (1);
}
return (0);
}
/*
* Given a /devices path, lookup the corresponding devid for each minor node,
* and find any vdevs with matching devids. Doing this straight up would be
* rather inefficient, O(minor nodes * vdevs in system), so we take advantage of
* the fact that each devid ends with "/<minornode>". Once we find any valid
* minor node, we chop off the portion after the last slash, and then search for
* matching vdevs, which is O(vdevs in system).
*/
static boolean_t
devid_iter(const char *devpath, zfs_process_func_t func, boolean_t wholedisk)
{
size_t len = strlen(devpath) + sizeof ("/devices") +
sizeof (PHYS_PATH) - 1;
char *fullpath;
int fd;
ddi_devid_t devid;
char *devidstr, *fulldevid;
dev_data_t data = { 0 };
/*
* Try to open a known minor node.
*/
fullpath = alloca(len);
(void) snprintf(fullpath, len, "/devices%s%s", devpath, PHYS_PATH);
if ((fd = open(fullpath, O_RDONLY)) < 0)
return (B_FALSE);
/*
* Determine the devid as a string, with no trailing slash for the minor
* node.
*/
if (devid_get(fd, &devid) != 0) {
(void) close(fd);
return (B_FALSE);
}
(void) close(fd);
if ((devidstr = devid_str_encode(devid, NULL)) == NULL) {
devid_free(devid);
return (B_FALSE);
}
len = strlen(devidstr) + 2;
fulldevid = alloca(len);
(void) snprintf(fulldevid, len, "%s/", devidstr);
data.dd_compare = fulldevid;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_DEVID;
data.dd_found = B_FALSE;
data.dd_isdisk = wholedisk;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
devid_str_free(devidstr);
devid_free(devid);
return (data.dd_found);
}
nvlist_t *
zpool_search_import(libzfs_handle_t *hdl, importargs_t *import)
{
verify(import->poolname == NULL || import->guid == 0);
if (import->unique)
import->exists = zpool_iter(hdl, name_or_guid_exists, import);
if (import->cachefile != NULL)
return (zpool_find_import_cached(hdl, import->cachefile,
import->poolname, import->guid));
return (zpool_find_import_impl(hdl, import));
}
/*
* Given a physical device path, iterate over all (pool, vdev) pairs which
* correspond to the given path.
*/
static boolean_t
devpath_iter(const char *devpath, zfs_process_func_t func, boolean_t wholedisk)
{
dev_data_t data = { 0 };
data.dd_compare = devpath;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_PHYS_PATH;
data.dd_found = B_FALSE;
data.dd_isdisk = wholedisk;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (data.dd_found);
}
/*
* Given a device identifier, find any vdevs with a matching devid.
* On Linux we can match devid directly which is always a whole disk.
*/
static boolean_t
devid_iter(const char *devid, zfs_process_func_t func, boolean_t is_slice)
{
dev_data_t data = { 0 };
data.dd_compare = devid;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_DEVID;
data.dd_found = B_FALSE;
data.dd_islabeled = is_slice;
data.dd_new_devid = devid;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (data.dd_found);
}
/*
* Given a physical device location, iterate over all
* (pool, vdev) pairs which correspond to that location.
*/
static boolean_t
devphys_iter(const char *physical, const char *devid, zfs_process_func_t func,
boolean_t is_slice)
{
dev_data_t data = { 0 };
data.dd_compare = physical;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_PHYS_PATH;
data.dd_found = B_FALSE;
data.dd_islabeled = is_slice;
data.dd_new_devid = devid; /* used by auto replace code */
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (data.dd_found);
}
static void
zfs_purge_cases(fmd_hdl_t *hdl)
{
zfs_case_t *zcp;
uu_list_walk_t *walk;
libzfs_handle_t *zhdl = fmd_hdl_getspecific(hdl);
/*
* There is no way to open a pool by GUID, or lookup a vdev by GUID. No
* matter what we do, we're going to have to stomach an O(vdevs * cases)
* algorithm. In reality, both quantities are likely so small that
* neither will matter. Given that iterating over pools is more
* expensive than iterating over the in-memory case list, we opt for a
* 'present' flag in each case that starts off cleared. We then iterate
* over all pools, marking those that are still present, and removing
* those that aren't found.
*
* Note that we could also construct an FMRI and rely on
* fmd_nvl_fmri_present(), but this would end up doing the same search.
*/
/*
* Mark the cases as not present.
*/
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp))
zcp->zc_present = B_FALSE;
/*
* Iterate over all pools and mark the pools and vdevs found. If this
* fails (most probably because we're out of memory), then don't close
* any of the cases and we cannot be sure they are accurate.
*/
if (zpool_iter(zhdl, zfs_mark_pool, NULL) != 0)
return;
/*
* Remove those cases which were not found.
*/
walk = uu_list_walk_start(zfs_cases, UU_WALK_ROBUST);
while ((zcp = uu_list_walk_next(walk)) != NULL) {
if (!zcp->zc_present)
fmd_case_close(hdl, zcp->zc_case);
}
uu_list_walk_end(walk);
}
/*
* This function handles the ESC_DEV_DLE event.
*/
static int
zfs_deliver_dle(nvlist_t *nvl)
{
char *devname;
if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devname) != 0) {
zed_log_msg(LOG_INFO, "zfs_deliver_event: no physpath");
return (-1);
}
if (zpool_iter(g_zfshdl, zfsdle_vdev_online, devname) != 1) {
zed_log_msg(LOG_INFO, "zfs_deliver_event: device '%s' not "
"found", devname);
return (1);
}
return (0);
}
/*
* Called when we receive a VDEV_CHECK event, which indicates a device could not
* be opened during initial pool open, but the autoreplace property was set on
* the pool. In this case, we treat it as if it were an add event.
*/
static int
zfs_deliver_check(nvlist_t *nvl)
{
dev_data_t data = { 0 };
if (nvlist_lookup_uint64(nvl, ZFS_EV_POOL_GUID,
&data.dd_pool_guid) != 0 ||
nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID,
&data.dd_vdev_guid) != 0 ||
data.dd_vdev_guid == 0)
return (0);
data.dd_isdisk = B_TRUE;
data.dd_func = zfs_process_add;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (0);
}
/*
* Called when we receive a VDEV_CHECK event, which indicates a device could not
* be opened during initial pool open, but the autoreplace property was set on
* the pool. In this case, we treat it as if it were an add event.
*/
static int
zfs_deliver_check(nvlist_t *nvl)
{
dev_data_t data = { 0 };
if (nvlist_lookup_uint64(nvl, ZFS_EV_POOL_GUID,
&data.dd_pool_guid) != 0 ||
nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID,
&data.dd_vdev_guid) != 0 ||
data.dd_vdev_guid == 0)
return (0);
zed_log_msg(LOG_INFO, "zfs_deliver_check: pool '%llu', vdev %llu",
data.dd_pool_guid, data.dd_vdev_guid);
data.dd_func = zfs_process_add;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (0);
}
/*
* Create a list of pools based on the given arguments. If we're given no
* arguments, then iterate over all pools in the system and add them to the AVL
* tree. Otherwise, add only those pool explicitly specified on the command
* line.
*/
zpool_list_t *
pool_list_get(int argc, char **argv, zprop_list_t **proplist, int *err)
{
zpool_list_t *zlp;
zlp = safe_malloc(sizeof (zpool_list_t));
zlp->zl_pool = uu_avl_pool_create("zfs_pool", sizeof (zpool_node_t),
offsetof(zpool_node_t, zn_avlnode), zpool_compare, UU_DEFAULT);
if (zlp->zl_pool == NULL)
zpool_no_memory();
if ((zlp->zl_avl = uu_avl_create(zlp->zl_pool, NULL,
UU_DEFAULT)) == NULL)
zpool_no_memory();
zlp->zl_proplist = proplist;
if (argc == 0) {
(void) zpool_iter(g_zfs, add_pool, zlp);
zlp->zl_findall = B_TRUE;
} else {
int i;
for (i = 0; i < argc; i++) {
zpool_handle_t *zhp;
if ((zhp = zpool_open_canfail(g_zfs, argv[i])) !=
NULL) {
if (add_pool(zhp, zlp) != 0)
*err = B_TRUE;
} else {
*err = B_TRUE;
}
}
}
return (zlp);
}
int
fmd_fmri_unusable(nvlist_t *nvl)
{
uint64_t pool_guid, vdev_guid;
cbdata_t cb;
nvlist_t *vd;
int ret;
(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
cb.cb_guid = pool_guid;
cb.cb_pool = NULL;
if (zpool_iter(g_zfs, find_pool, &cb) != 1)
return (1);
if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {
ret = (zpool_get_state(cb.cb_pool) == POOL_STATE_UNAVAIL);
zpool_close(cb.cb_pool);
return (ret);
}
vd = find_vdev(cb.cb_pool, vdev_guid);
if (vd == NULL) {
ret = 1;
} else {
vdev_stat_t *vs;
uint_t c;
(void) nvlist_lookup_uint64_array(vd, ZPOOL_CONFIG_STATS,
(uint64_t **)&vs, &c);
ret = (vs->vs_state < VDEV_STATE_DEGRADED);
}
zpool_close(cb.cb_pool);
return (ret);
}
/*
* This function handles the ESC_DEV_DLE device change event. Use the
* provided vdev guid when looking up a disk or partition, when the guid
* is not present assume the entire disk is owned by ZFS and append the
* expected -part1 partition information then lookup by physical path.
*/
static int
zfs_deliver_dle(nvlist_t *nvl)
{
char *devname, name[MAXPATHLEN];
uint64_t guid;
if (nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID, &guid) == 0) {
sprintf(name, "%llu", (u_longlong_t)guid);
} else if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devname) == 0) {
strlcpy(name, devname, MAXPATHLEN);
zfs_append_partition(name, MAXPATHLEN);
} else {
zed_log_msg(LOG_INFO, "zfs_deliver_dle: no guid or physpath");
}
if (zpool_iter(g_zfshdl, zfsdle_vdev_online, name) != 1) {
zed_log_msg(LOG_INFO, "zfs_deliver_dle: device '%s' not "
"found", name);
return (1);
}
return (0);
}
ssize_t
fmd_fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)
{
uint64_t pool_guid, vdev_guid;
cbdata_t cb;
ssize_t len;
const char *name;
char guidbuf[64];
(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
/*
* Attempt to convert the pool guid to a name.
*/
cb.cb_guid = pool_guid;
cb.cb_pool = NULL;
if (zpool_iter(g_zfs, find_pool, &cb) == 1) {
name = zpool_get_name(cb.cb_pool);
} else {
(void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid);
name = guidbuf;
}
if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0)
len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx",
FM_FMRI_SCHEME_ZFS, name, vdev_guid);
else
len = snprintf(buf, buflen, "%s://pool=%s",
FM_FMRI_SCHEME_ZFS, name);
if (cb.cb_pool)
zpool_close(cb.cb_pool);
return (len);
}
/*
* Search for any new pools, adding them to the list. We only add pools when no
* options were given on the command line. Otherwise, we keep the list fixed as
* those that were explicitly specified.
*/
void
pool_list_update(zpool_list_t *zlp)
{
if (zlp->zl_findall)
(void) zpool_iter(g_zfs, add_pool, zlp);
}
/*
* Determines if the pool is in use. If so, it returns true and the state of
* the pool as well as the name of the pool. Both strings are allocated and
* must be freed by the caller.
*/
int
zpool_in_use(libzfs_handle_t *hdl, int fd, pool_state_t *state, char **namestr,
boolean_t *inuse)
{
nvlist_t *config;
char *name;
boolean_t ret;
uint64_t guid, vdev_guid;
zpool_handle_t *zhp;
nvlist_t *pool_config;
uint64_t stateval, isspare;
aux_cbdata_t cb = { 0 };
boolean_t isactive;
*inuse = B_FALSE;
if (zpool_read_label(fd, &config, NULL) != 0 && errno == ENOMEM) {
(void) no_memory(hdl);
return (-1);
}
if (config == NULL)
return (0);
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE,
&stateval) == 0);
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID,
&vdev_guid) == 0);
if (stateval != POOL_STATE_SPARE && stateval != POOL_STATE_L2CACHE) {
verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
&name) == 0);
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
&guid) == 0);
}
switch (stateval) {
case POOL_STATE_EXPORTED:
/*
* A pool with an exported state may in fact be imported
* read-only, so check the in-core state to see if it's
* active and imported read-only. If it is, set
* its state to active.
*/
if (pool_active(hdl, name, guid, &isactive) == 0 && isactive &&
(zhp = zpool_open_canfail(hdl, name)) != NULL) {
if (zpool_get_prop_int(zhp, ZPOOL_PROP_READONLY, NULL))
stateval = POOL_STATE_ACTIVE;
/*
* All we needed the zpool handle for is the
* readonly prop check.
*/
zpool_close(zhp);
}
ret = B_TRUE;
break;
case POOL_STATE_ACTIVE:
/*
* For an active pool, we have to determine if it's really part
* of a currently active pool (in which case the pool will exist
* and the guid will be the same), or whether it's part of an
* active pool that was disconnected without being explicitly
* exported.
*/
if (pool_active(hdl, name, guid, &isactive) != 0) {
nvlist_free(config);
return (-1);
}
if (isactive) {
/*
* Because the device may have been removed while
* offlined, we only report it as active if the vdev is
* still present in the config. Otherwise, pretend like
* it's not in use.
*/
if ((zhp = zpool_open_canfail(hdl, name)) != NULL &&
(pool_config = zpool_get_config(zhp, NULL))
!= NULL) {
nvlist_t *nvroot;
verify(nvlist_lookup_nvlist(pool_config,
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
ret = find_guid(nvroot, vdev_guid);
} else {
ret = B_FALSE;
}
/*
* If this is an active spare within another pool, we
* treat it like an unused hot spare. This allows the
* user to create a pool with a hot spare that currently
* in use within another pool. Since we return B_TRUE,
* libdiskmgt will continue to prevent generic consumers
* from using the device.
*/
if (ret && nvlist_lookup_uint64(config,
ZPOOL_CONFIG_IS_SPARE, &isspare) == 0 && isspare)
stateval = POOL_STATE_SPARE;
if (zhp != NULL)
zpool_close(zhp);
} else {
stateval = POOL_STATE_POTENTIALLY_ACTIVE;
ret = B_TRUE;
}
break;
case POOL_STATE_SPARE:
/*
* For a hot spare, it can be either definitively in use, or
* potentially active. To determine if it's in use, we iterate
* over all pools in the system and search for one with a spare
* with a matching guid.
*
* Due to the shared nature of spares, we don't actually report
* the potentially active case as in use. This means the user
* can freely create pools on the hot spares of exported pools,
* but to do otherwise makes the resulting code complicated, and
* we end up having to deal with this case anyway.
*/
cb.cb_zhp = NULL;
cb.cb_guid = vdev_guid;
cb.cb_type = ZPOOL_CONFIG_SPARES;
if (zpool_iter(hdl, find_aux, &cb) == 1) {
name = (char *)zpool_get_name(cb.cb_zhp);
ret = B_TRUE;
} else {
ret = B_FALSE;
}
break;
case POOL_STATE_L2CACHE:
/*
* Check if any pool is currently using this l2cache device.
*/
cb.cb_zhp = NULL;
cb.cb_guid = vdev_guid;
cb.cb_type = ZPOOL_CONFIG_L2CACHE;
if (zpool_iter(hdl, find_aux, &cb) == 1) {
name = (char *)zpool_get_name(cb.cb_zhp);
ret = B_TRUE;
} else {
ret = B_FALSE;
}
break;
default:
ret = B_FALSE;
}
if (ret) {
if ((*namestr = zfs_strdup(hdl, name)) == NULL) {
if (cb.cb_zhp)
zpool_close(cb.cb_zhp);
nvlist_free(config);
return (-1);
}
*state = (pool_state_t)stateval;
}
if (cb.cb_zhp)
zpool_close(cb.cb_zhp);
nvlist_free(config);
*inuse = ret;
return (0);
}
