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JSON output support for zpool get

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This commit adds support for zpool get command to output the list of
properties for ZFS Pools and VDEVS in JSON format using '-j' option.
Man page for zpool get is updated to include '-j' option.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Signed-off-by: Umer Saleem <usaleem@ixsystems.com>
Closes #16217
This commit is contained in:
Umer Saleem 2024-04-24 19:58:17 +05:00 committed by Brian Behlendorf
parent 5cbdd5ea4f
commit eb2b824bde
5 changed files with 287 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
cmd/zfs/zfs_main.c
View File

@ -1972,26 +1972,6 @@ fill_dataset_info(nvlist_t *list, zfs_handle_t *zhp, boolean_t as_int)
}
}
static int
zprop_collect_property(const char *name, zprop_get_cbdata_t *cbp,
const char *propname, const char *value, zprop_source_t sourcetype,
const char *source, const char *recvd_value, nvlist_t *nvl)
{
if (cbp->cb_json) {
if ((sourcetype & cbp->cb_sources) == 0)
return (0);
else {
return (zprop_nvlist_one_property(propname, value,
sourcetype, source, recvd_value, nvl,
cbp->cb_json_as_int));
}
} else {
zprop_print_one_property(name, cbp,
propname, value, sourcetype, source, recvd_value);
return (0);
}
}
/*
* zfs get [-rHp] [-j [--json-int]] [-o all | field[,field]...]
* [-s source[,source]...]

287
cmd/zpool/zpool_main.c
View File

@ -139,7 +139,9 @@ enum zpool_options {
ZPOOL_OPTION_POWER = 1024,
ZPOOL_OPTION_ALLOW_INUSE,
ZPOOL_OPTION_ALLOW_REPLICATION_MISMATCH,
ZPOOL_OPTION_ALLOW_ASHIFT_MISMATCH
ZPOOL_OPTION_ALLOW_ASHIFT_MISMATCH,
ZPOOL_OPTION_POOL_KEY_GUID,
ZPOOL_OPTION_JSON_NUMS_AS_INT
};
/*
@ -440,7 +442,8 @@ get_usage(zpool_help_t idx)
case HELP_EVENTS:
return (gettext("\tevents [-vHf [pool] | -c]\n"));
case HELP_GET:
return (gettext("\tget [-Hp] [-o \"all\" | field[,...]] "
return (gettext("\tget [-Hp] [-j [--json-int, "
"--json-pool-key-guid]] [-o \"all\" | field[,...]] "
"<\"all\" | property[,...]> <pool> ...\n"));
case HELP_SET:
return (gettext("\tset <property=value> <pool>\n"
@ -898,6 +901,109 @@ print_spare_list(nvlist_t *nv, int indent)
}
}
/*
* Generates an nvlist with output version for every command based on params.
* Purpose of this is to add a version of JSON output, considering the schema
* format might be updated for each command in future.
*
* Schema:
*
* "output_version": {
* "command": string,
* "vers_major": integer,
* "vers_minor": integer,
* }
*/
static nvlist_t *
zpool_json_schema(int maj_v, int min_v)
{
char cmd[MAX_CMD_LEN];
nvlist_t *sch = fnvlist_alloc();
nvlist_t *ov = fnvlist_alloc();
snprintf(cmd, MAX_CMD_LEN, "zpool %s", current_command->name);
fnvlist_add_string(ov, "command", cmd);
fnvlist_add_uint32(ov, "vers_major", maj_v);
fnvlist_add_uint32(ov, "vers_minor", min_v);
fnvlist_add_nvlist(sch, "output_version", ov);
fnvlist_free(ov);
return (sch);
}
static void
fill_pool_info(nvlist_t *list, zpool_handle_t *zhp, boolean_t addtype,
boolean_t as_int)
{
nvlist_t *config = zpool_get_config(zhp, NULL);
uint64_t guid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID);
uint64_t txg = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG);
fnvlist_add_string(list, "name", zpool_get_name(zhp));
if (addtype)
fnvlist_add_string(list, "type", "POOL");
fnvlist_add_string(list, "state", zpool_get_state_str(zhp));
if (as_int) {
if (guid)
fnvlist_add_uint64(list, ZPOOL_CONFIG_POOL_GUID, guid);
if (txg)
fnvlist_add_uint64(list, ZPOOL_CONFIG_POOL_TXG, txg);
fnvlist_add_uint64(list, "spa_version", SPA_VERSION);
fnvlist_add_uint64(list, "zpl_version", ZPL_VERSION);
} else {
char value[ZFS_MAXPROPLEN];
if (guid) {
snprintf(value, ZFS_MAXPROPLEN, "%llu",
(u_longlong_t)guid);
fnvlist_add_string(list, ZPOOL_CONFIG_POOL_GUID, value);
}
if (txg) {
snprintf(value, ZFS_MAXPROPLEN, "%llu",
(u_longlong_t)txg);
fnvlist_add_string(list, ZPOOL_CONFIG_POOL_TXG, value);
}
fnvlist_add_string(list, "spa_version", SPA_VERSION_STRING);
fnvlist_add_string(list, "zpl_version", ZPL_VERSION_STRING);
}
}
static void
fill_vdev_info(nvlist_t *list, zpool_handle_t *zhp, char *name,
boolean_t as_int)
{
boolean_t spare, l2c, log;
const char *path, *phys, *devid;
nvlist_t *nvdev = zpool_find_vdev(zhp, name, &spare, &l2c, &log);
fnvlist_add_string(list, "name", name);
fnvlist_add_string(list, "type", "VDEV");
if (nvdev) {
const char *type = fnvlist_lookup_string(nvdev,
ZPOOL_CONFIG_TYPE);
if (type)
fnvlist_add_string(list, "vdev_type", type);
uint64_t guid = fnvlist_lookup_uint64(nvdev, ZPOOL_CONFIG_GUID);
if (guid) {
if (as_int) {
fnvlist_add_uint64(list, "guid", guid);
} else {
char buf[ZFS_MAXPROPLEN];
snprintf(buf, ZFS_MAXPROPLEN, "%llu",
(u_longlong_t)guid);
fnvlist_add_string(list, "guid", buf);
}
}
if (nvlist_lookup_string(nvdev, ZPOOL_CONFIG_PATH, &path) == 0)
fnvlist_add_string(list, "path", path);
if (nvlist_lookup_string(nvdev, ZPOOL_CONFIG_PHYS_PATH,
&phys) == 0)
fnvlist_add_string(list, "phys_path", phys);
if (nvlist_lookup_string(nvdev, ZPOOL_CONFIG_DEVID,
&devid) == 0)
fnvlist_add_string(list, "devid", devid);
}
}
static boolean_t
prop_list_contains_feature(nvlist_t *proplist)
{
@ -10346,35 +10452,6 @@ zpool_do_history(int argc, char **argv)
return (ret);
}
/*
* Generates an nvlist with output version for every command based on params.
* Purpose of this is to add a version of JSON output, considering the schema
* format might be updated for each command in future.
*
* Schema:
*
* "output_version": {
* "command": string,
* "vers_major": integer,
* "vers_minor": integer,
* }
*/
static nvlist_t *
zpool_json_schema(int maj_v, int min_v)
{
char cmd[MAX_CMD_LEN];
nvlist_t *sch = fnvlist_alloc();
nvlist_t *ov = fnvlist_alloc();
snprintf(cmd, MAX_CMD_LEN, "zpool %s", current_command->name);
fnvlist_add_string(ov, "command", cmd);
fnvlist_add_uint32(ov, "vers_major", maj_v);
fnvlist_add_uint32(ov, "vers_minor", min_v);
fnvlist_add_nvlist(sch, "output_version", ov);
return (sch);
}
typedef struct ev_opts {
int verbose;
int scripted;
@ -10769,6 +10846,17 @@ get_callback_vdev(zpool_handle_t *zhp, char *vdevname, void *data)
zprop_get_cbdata_t *cbp = (zprop_get_cbdata_t *)data;
char value[ZFS_MAXPROPLEN];
zprop_source_t srctype;
nvlist_t *props, *item, *d;
props = item = d = NULL;
if (cbp->cb_json) {
d = fnvlist_lookup_nvlist(cbp->cb_jsobj, "vdevs");
if (d == NULL) {
fprintf(stderr, "vdevs obj not found.\n");
exit(1);
}
props = fnvlist_alloc();
}
for (zprop_list_t *pl = cbp->cb_proplist; pl != NULL;
pl = pl->pl_next) {
@ -10790,11 +10878,24 @@ get_callback_vdev(zpool_handle_t *zhp, char *vdevname, void *data)
if (zpool_get_vdev_prop(zhp, vdevname, pl->pl_prop,
prop_name, value, sizeof (value), &srctype,
cbp->cb_literal) == 0) {
zprop_print_one_property(vdevname, cbp, prop_name,
value, srctype, NULL, NULL);
zprop_collect_property(vdevname, cbp, prop_name,
value, srctype, NULL, NULL, props);
}
}
if (cbp->cb_json) {
if (!nvlist_empty(props)) {
item = fnvlist_alloc();
fill_vdev_info(item, zhp, vdevname,
cbp->cb_json_as_int);
fnvlist_add_nvlist(item, "properties", props);
fnvlist_add_nvlist(d, vdevname, item);
fnvlist_add_nvlist(cbp->cb_jsobj, "vdevs", d);
fnvlist_free(item);
}
fnvlist_free(props);
}
return (0);
}
@ -10836,8 +10937,18 @@ get_callback(zpool_handle_t *zhp, void *data)
zprop_source_t srctype;
zprop_list_t *pl;
int vid;
int err = 0;
nvlist_t *props, *item, *d;
props = item = d = NULL;
if (cbp->cb_type == ZFS_TYPE_VDEV) {
if (cbp->cb_json) {
nvlist_t *pool = fnvlist_alloc();
fill_pool_info(pool, zhp, B_FALSE, cbp->cb_json_as_int);
fnvlist_add_nvlist(cbp->cb_jsobj, "pool", pool);
fnvlist_free(pool);
}
if (strcmp(cbp->cb_vdevs.cb_names[0], "all-vdevs") == 0) {
for_each_vdev(zhp, get_callback_vdev_cb, data);
} else {
@ -10857,6 +10968,14 @@ get_callback(zpool_handle_t *zhp, void *data)
}
} else {
assert(cbp->cb_type == ZFS_TYPE_POOL);
if (cbp->cb_json) {
d = fnvlist_lookup_nvlist(cbp->cb_jsobj, "pools");
if (d == NULL) {
fprintf(stderr, "pools obj not found.\n");
exit(1);
}
props = fnvlist_alloc();
}
for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) {
/*
* Skip the special fake placeholder. This will also
@ -10874,9 +10993,9 @@ get_callback(zpool_handle_t *zhp, void *data)
value, sizeof (value), &srctype) != 0)
continue;
zprop_print_one_property(zpool_get_name(zhp),
cbp, pl->pl_user_prop, value, srctype,
NULL, NULL);
err = zprop_collect_property(
zpool_get_name(zhp), cbp, pl->pl_user_prop,
value, srctype, NULL, NULL, props);
} else if (pl->pl_prop == ZPROP_INVAL &&
(zpool_prop_feature(pl->pl_user_prop) ||
zpool_prop_unsupported(pl->pl_user_prop))) {
@ -10885,10 +11004,10 @@ get_callback(zpool_handle_t *zhp, void *data)
if (zpool_prop_get_feature(zhp,
pl->pl_user_prop, value,
sizeof (value)) == 0) {
zprop_print_one_property(
err = zprop_collect_property(
zpool_get_name(zhp), cbp,
pl->pl_user_prop, value, srctype,
NULL, NULL);
NULL, NULL, props);
}
} else {
if (zpool_get_prop(zhp, pl->pl_prop, value,
@ -10896,10 +11015,37 @@ get_callback(zpool_handle_t *zhp, void *data)
cbp->cb_literal) != 0)
continue;
zprop_print_one_property(zpool_get_name(zhp),
cbp, zpool_prop_to_name(pl->pl_prop),
value, srctype, NULL, NULL);
err = zprop_collect_property(
zpool_get_name(zhp), cbp,
zpool_prop_to_name(pl->pl_prop),
value, srctype, NULL, NULL, props);
}
if (err != 0)
return (err);
}
if (cbp->cb_json) {
if (!nvlist_empty(props)) {
item = fnvlist_alloc();
fill_pool_info(item, zhp, B_TRUE,
cbp->cb_json_as_int);
fnvlist_add_nvlist(item, "properties", props);
if (cbp->cb_json_pool_key_guid) {
char buf[256];
uint64_t guid = fnvlist_lookup_uint64(
zpool_get_config(zhp, NULL),
ZPOOL_CONFIG_POOL_GUID);
snprintf(buf, 256, "%llu",
(u_longlong_t)guid);
fnvlist_add_nvlist(d, buf, item);
} else {
const char *name = zpool_get_name(zhp);
fnvlist_add_nvlist(d, name, item);
}
fnvlist_add_nvlist(cbp->cb_jsobj, "pools", d);
fnvlist_free(item);
}
fnvlist_free(props);
}
}
@ -10914,6 +11060,9 @@ get_callback(zpool_handle_t *zhp, void *data)
* -o List of columns to display. Defaults to
* "name,property,value,source".
* -p Display values in parsable (exact) format.
* -j Display output in JSON format.
* --json-int Display numbers as integers instead of strings.
* --json-pool-key-guid Set pool GUID as key for pool objects.
*
* Get properties of pools in the system. Output space statistics
* for each one as well as other attributes.
@ -10927,6 +11076,7 @@ zpool_do_get(int argc, char **argv)
int c, i;
char *propstr = NULL;
char *vdev = NULL;
nvlist_t *data = NULL;
cb.cb_first = B_TRUE;
@ -10942,8 +11092,16 @@ zpool_do_get(int argc, char **argv)
cb.cb_vdevs.cb_name_flags |= VDEV_NAME_TYPE_ID;
current_prop_type = cb.cb_type;
struct option long_options[] = {
{"json-int", no_argument, NULL, ZPOOL_OPTION_JSON_NUMS_AS_INT},
{"json-pool-key-guid", no_argument, NULL,
ZPOOL_OPTION_POOL_KEY_GUID},
{0, 0, 0, 0}
};
/* check options */
while ((c = getopt(argc, argv, ":Hpo:")) != -1) {
while ((c = getopt_long(argc, argv, ":jHpo:", long_options,
NULL)) != -1) {
switch (c) {
case 'p':
cb.cb_literal = B_TRUE;
@ -10951,6 +11109,18 @@ zpool_do_get(int argc, char **argv)
case 'H':
cb.cb_scripted = B_TRUE;
break;
case 'j':
cb.cb_json = B_TRUE;
cb.cb_jsobj = zpool_json_schema(0, 1);
data = fnvlist_alloc();
break;
case ZPOOL_OPTION_POOL_KEY_GUID:
cb.cb_json_pool_key_guid = B_TRUE;
break;
case ZPOOL_OPTION_JSON_NUMS_AS_INT:
cb.cb_json_as_int = B_TRUE;
cb.cb_literal = B_TRUE;
break;
case 'o':
memset(&cb.cb_columns, 0, sizeof (cb.cb_columns));
i = 0;
@ -11005,6 +11175,18 @@ found:
argc -= optind;
argv += optind;
if (!cb.cb_json && cb.cb_json_as_int) {
(void) fprintf(stderr, gettext("'--json-int' only works with"
" '-j' option\n"));
usage(B_FALSE);
}
if (!cb.cb_json && cb.cb_json_pool_key_guid) {
(void) fprintf(stderr, gettext("'json-pool-key-guid' only"
" works with '-j' option\n"));
usage(B_FALSE);
}
if (argc < 1) {
(void) fprintf(stderr, gettext("missing property "
"argument\n"));
@ -11039,6 +11221,10 @@ found:
cb.cb_type = ZFS_TYPE_VDEV;
argc = 1; /* One pool to process */
} else {
if (cb.cb_json) {
nvlist_free(cb.cb_jsobj);
nvlist_free(data);
}
fprintf(stderr, gettext("Expected a list of vdevs in"
" \"%s\", but got:\n"), argv[0]);
error_list_unresolved_vdevs(argc - 1, argv + 1,
@ -11048,6 +11234,10 @@ found:
return (1);
}
} else {
if (cb.cb_json) {
nvlist_free(cb.cb_jsobj);
nvlist_free(data);
}
/*
* The first arg isn't the name of a valid pool.
*/
@ -11070,9 +11260,22 @@ found:
cb.cb_proplist = &fake_name;
}
if (cb.cb_json) {
if (cb.cb_type == ZFS_TYPE_VDEV)
fnvlist_add_nvlist(cb.cb_jsobj, "vdevs", data);
else
fnvlist_add_nvlist(cb.cb_jsobj, "pools", data);
fnvlist_free(data);
}
ret = for_each_pool(argc, argv, B_TRUE, &cb.cb_proplist, cb.cb_type,
cb.cb_literal, get_callback, &cb);
if (ret == 0 && cb.cb_json)
zcmd_print_json(cb.cb_jsobj);
else if (ret != 0 && cb.cb_json)
nvlist_free(cb.cb_jsobj);
if (cb.cb_proplist == &fake_name)
zprop_free_list(fake_name.pl_next);
else

5
include/libzfs.h
View File

@ -666,6 +666,7 @@ typedef struct zprop_get_cbdata {
vdev_cbdata_t cb_vdevs;
nvlist_t *cb_jsobj;
boolean_t cb_json_as_int;
boolean_t cb_json_pool_key_guid;
} zprop_get_cbdata_t;
#define ZFS_SET_NOMOUNT 1
@ -682,6 +683,10 @@ _LIBZFS_H void zprop_print_one_property(const char *, zprop_get_cbdata_t *,
_LIBZFS_H int zprop_nvlist_one_property(const char *, const char *,
zprop_source_t, const char *, const char *, nvlist_t *, boolean_t);
_LIBZFS_H int zprop_collect_property(const char *, zprop_get_cbdata_t *,
const char *, const char *, zprop_source_t, const char *,
const char *, nvlist_t *);
/*
* Iterator functions.
*/

20
lib/libzfs/libzfs_util.c
View File

@ -1590,6 +1590,26 @@ zprop_print_one_property(const char *name, zprop_get_cbdata_t *cbp,
(void) printf("\n");
}
int
zprop_collect_property(const char *name, zprop_get_cbdata_t *cbp,
const char *propname, const char *value, zprop_source_t sourcetype,
const char *source, const char *recvd_value, nvlist_t *nvl)
{
if (cbp->cb_json) {
if ((sourcetype & cbp->cb_sources) == 0)
return (0);
else {
return (zprop_nvlist_one_property(propname, value,
sourcetype, source, recvd_value, nvl,
cbp->cb_json_as_int));
}
} else {
zprop_print_one_property(name, cbp,
propname, value, sourcetype, source, recvd_value);
return (0);
}
}
/*
* Given a numeric suffix, convert the value into a number of bits that the
* resulting value must be shifted.

17
man/man8/zpool-get.8
View File

@ -37,6 +37,7 @@
.Nm zpool
.Cm get
.Op Fl Hp
.Op Fl j Op Ar --json-int, --json-pool-key-guid
.Op Fl o Ar field Ns Oo , Ns Ar field Oc Ns …
.Sy all Ns | Ns Ar property Ns Oo , Ns Ar property Oc Ns …
.Oo Ar pool Oc Ns …
@ -44,6 +45,7 @@
.Nm zpool
.Cm get
.Op Fl Hp
.Op Fl j Op Ar --json-int
.Op Fl o Ar field Ns Oo , Ns Ar field Oc Ns …
.Sy all Ns | Ns Ar property Ns Oo , Ns Ar property Oc Ns …
.Ar pool
@ -67,6 +69,7 @@
.Nm zpool
.Cm get
.Op Fl Hp
.Op Fl j Op Ar --json-int, --json-pool-key-guid
.Op Fl o Ar field Ns Oo , Ns Ar field Oc Ns …
.Sy all Ns | Ns Ar property Ns Oo , Ns Ar property Oc Ns …
.Oo Ar pool Oc Ns …
@ -95,6 +98,14 @@ See the
.Xr zpoolprops 7
manual page for more information on the available pool properties.
.Bl -tag -compact -offset Ds -width "-o field"
.It Fl j Op Ar --json-int, --json-pool-key-guid
Display the list of properties in JSON format.
Specify
.Sy --json-int
to display the numbers in integer format instead of strings in JSON output.
Specify
.Sy --json-pool-key-guid
to set pool GUID as key for pool objects instead of pool name.
.It Fl H
Scripted mode.
Do not display headers, and separate fields by a single tab instead of arbitrary
@ -108,6 +119,7 @@ Display numbers in parsable (exact) values.
.It Xo
.Nm zpool
.Cm get
.Op Fl j Op Ar --json-int
.Op Fl Hp
.Op Fl o Ar field Ns Oo , Ns Ar field Oc Ns …
.Sy all Ns | Ns Ar property Ns Oo , Ns Ar property Oc Ns …
@ -145,6 +157,11 @@ See the
.Xr vdevprops 7
manual page for more information on the available pool properties.
.Bl -tag -compact -offset Ds -width "-o field"
.It Fl j Op Ar --json-int
Display the list of properties in JSON format.
Specify
.Sy --json-int
to display the numbers in integer format instead of strings in JSON output.
.It Fl H
Scripted mode.
Do not display headers, and separate fields by a single tab instead of arbitrary