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JSON output support for zfs list
This commit adds support for JSON output for zfs list using '-j' option. Information is collected in JSON format which is later printed in jSON format. Existing options for zfs list also work with '-j'. man pages are updated with relevant information. 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
Brian Behlendorf
parent
aa15b60e58
commit
443abfc71d
@ -310,8 +310,9 @@ get_usage(zfs_help_t idx)
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return (gettext("\tupgrade [-v]\n"
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"\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
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case HELP_LIST:
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return (gettext("\tlist [-Hp] [-r|-d max] [-o property[,...]] "
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"[-s property]...\n\t [-S property]... [-t type[,...]] "
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return (gettext("\tlist [-Hp] [-j [--json-int]] [-r|-d max] "
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"[-o property[,...]] [-s property]...\n\t "
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"[-S property]... [-t type[,...]] "
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"[filesystem|volume|snapshot] ...\n"));
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case HELP_MOUNT:
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return (gettext("\tmount\n"
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@ -3609,6 +3610,9 @@ typedef struct list_cbdata {
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boolean_t cb_literal;
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boolean_t cb_scripted;
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zprop_list_t *cb_proplist;
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boolean_t cb_json;
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nvlist_t *cb_jsobj;
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boolean_t cb_json_as_int;
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} list_cbdata_t;
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/*
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@ -3679,10 +3683,11 @@ zfs_list_avail_color(zfs_handle_t *zhp)
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/*
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* Given a dataset and a list of fields, print out all the properties according
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* to the described layout.
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* to the described layout, or return an nvlist containing all the fields, later
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* to be printed out as JSON object.
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*/
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static void
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print_dataset(zfs_handle_t *zhp, list_cbdata_t *cb)
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collect_dataset(zfs_handle_t *zhp, list_cbdata_t *cb)
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{
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zprop_list_t *pl = cb->cb_proplist;
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boolean_t first = B_TRUE;
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@ -3691,9 +3696,23 @@ print_dataset(zfs_handle_t *zhp, list_cbdata_t *cb)
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nvlist_t *propval;
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const char *propstr;
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boolean_t right_justify;
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nvlist_t *item, *d, *props;
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item = d = props = NULL;
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zprop_source_t sourcetype = ZPROP_SRC_NONE;
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char source[ZFS_MAX_DATASET_NAME_LEN];
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if (cb->cb_json) {
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d = fnvlist_lookup_nvlist(cb->cb_jsobj, "datasets");
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if (d == NULL) {
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fprintf(stderr, "datasets obj not found.\n");
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exit(1);
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}
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item = fnvlist_alloc();
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props = fnvlist_alloc();
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fill_dataset_info(item, zhp, cb->cb_json_as_int);
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}
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for (; pl != NULL; pl = pl->pl_next) {
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if (!first) {
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if (!cb->cb_json && !first) {
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if (cb->cb_scripted)
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(void) putchar('\t');
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else
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@ -3709,68 +3728,111 @@ print_dataset(zfs_handle_t *zhp, list_cbdata_t *cb)
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right_justify = zfs_prop_align_right(pl->pl_prop);
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} else if (pl->pl_prop != ZPROP_USERPROP) {
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if (zfs_prop_get(zhp, pl->pl_prop, property,
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sizeof (property), NULL, NULL, 0,
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cb->cb_literal) != 0)
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sizeof (property), &sourcetype, source,
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sizeof (source), cb->cb_literal) != 0)
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propstr = "-";
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else
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propstr = property;
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right_justify = zfs_prop_align_right(pl->pl_prop);
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} else if (zfs_prop_userquota(pl->pl_user_prop)) {
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sourcetype = ZPROP_SRC_LOCAL;
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if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
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property, sizeof (property), cb->cb_literal) != 0)
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property, sizeof (property), cb->cb_literal) != 0) {
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sourcetype = ZPROP_SRC_NONE;
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propstr = "-";
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else
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} else {
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propstr = property;
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}
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right_justify = B_TRUE;
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} else if (zfs_prop_written(pl->pl_user_prop)) {
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sourcetype = ZPROP_SRC_LOCAL;
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if (zfs_prop_get_written(zhp, pl->pl_user_prop,
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property, sizeof (property), cb->cb_literal) != 0)
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property, sizeof (property), cb->cb_literal) != 0) {
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sourcetype = ZPROP_SRC_NONE;
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propstr = "-";
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else
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} else {
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propstr = property;
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}
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right_justify = B_TRUE;
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} else {
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if (nvlist_lookup_nvlist(userprops,
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pl->pl_user_prop, &propval) != 0)
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pl->pl_user_prop, &propval) != 0) {
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propstr = "-";
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else
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} else {
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propstr = fnvlist_lookup_string(propval,
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ZPROP_VALUE);
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strlcpy(source,
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fnvlist_lookup_string(propval,
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ZPROP_SOURCE), ZFS_MAX_DATASET_NAME_LEN);
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if (strcmp(source,
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zfs_get_name(zhp)) == 0) {
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sourcetype = ZPROP_SRC_LOCAL;
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} else if (strcmp(source,
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ZPROP_SOURCE_VAL_RECVD) == 0) {
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sourcetype = ZPROP_SRC_RECEIVED;
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} else {
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sourcetype = ZPROP_SRC_INHERITED;
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}
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}
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right_justify = B_FALSE;
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}
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if (cb->cb_json) {
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if (pl->pl_prop == ZFS_PROP_NAME)
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continue;
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if (zprop_nvlist_one_property(
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zfs_prop_to_name(pl->pl_prop), propstr,
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sourcetype, source, NULL, props,
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cb->cb_json_as_int) != 0)
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nomem();
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} else {
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/*
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* zfs_list_avail_color() needs ZFS_PROP_AVAILABLE + USED
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* - so we need another for() search for the USED part
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* - when no colors wanted, we can skip the whole thing
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* zfs_list_avail_color() needs
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* ZFS_PROP_AVAILABLE + USED, so we need another
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* for() search for the USED part when no colors
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* wanted, we can skip the whole thing
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*/
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if (use_color() && pl->pl_prop == ZFS_PROP_AVAILABLE) {
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zprop_list_t *pl2 = cb->cb_proplist;
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for (; pl2 != NULL; pl2 = pl2->pl_next) {
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if (pl2->pl_prop == ZFS_PROP_USED) {
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color_start(zfs_list_avail_color(zhp));
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/* found it, no need for more loops */
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color_start(
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zfs_list_avail_color(zhp));
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/*
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* found it, no need for more
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* loops
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*/
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break;
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}
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}
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}
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/*
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* If this is being called in scripted mode, or if this is the
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* last column and it is left-justified, don't include a width
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* format specifier.
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* If this is being called in scripted mode, or if
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* this is the last column and it is left-justified,
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* don't include a width format specifier.
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*/
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if (cb->cb_scripted || (pl->pl_next == NULL && !right_justify))
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if (cb->cb_scripted || (pl->pl_next == NULL &&
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!right_justify))
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(void) fputs(propstr, stdout);
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else if (right_justify)
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(void) printf("%*s", (int)pl->pl_width, propstr);
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else
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(void) printf("%-*s", (int)pl->pl_width, propstr);
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else if (right_justify) {
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(void) printf("%*s", (int)pl->pl_width,
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propstr);
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} else {
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(void) printf("%-*s", (int)pl->pl_width,
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propstr);
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}
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if (pl->pl_prop == ZFS_PROP_AVAILABLE)
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color_end();
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}
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}
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if (cb->cb_json) {
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fnvlist_add_nvlist(item, "properties", props);
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fnvlist_add_nvlist(d, zfs_get_name(zhp), item);
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fnvlist_free(props);
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fnvlist_free(item);
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} else
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(void) putchar('\n');
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}
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@ -3783,12 +3845,12 @@ list_callback(zfs_handle_t *zhp, void *data)
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list_cbdata_t *cbp = data;
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if (cbp->cb_first) {
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if (!cbp->cb_scripted)
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if (!cbp->cb_scripted && !cbp->cb_json)
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print_header(cbp);
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cbp->cb_first = B_FALSE;
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}
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print_dataset(zhp, cbp);
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collect_dataset(zhp, cbp);
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return (0);
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}
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@ -3807,9 +3869,16 @@ zfs_do_list(int argc, char **argv)
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int ret = 0;
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zfs_sort_column_t *sortcol = NULL;
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int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
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nvlist_t *data = NULL;
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struct option long_options[] = {
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{"json-int", no_argument, NULL, ZFS_OPTION_JSON_NUMS_AS_INT},
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{0, 0, 0, 0}
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};
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/* check options */
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while ((c = getopt(argc, argv, "HS:d:o:prs:t:")) != -1) {
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while ((c = getopt_long(argc, argv, "jHS:d:o:prs:t:", long_options,
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NULL)) != -1) {
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switch (c) {
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case 'o':
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fields = optarg;
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@ -3824,6 +3893,17 @@ zfs_do_list(int argc, char **argv)
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case 'r':
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flags |= ZFS_ITER_RECURSE;
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break;
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case 'j':
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cb.cb_json = B_TRUE;
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cb.cb_jsobj = zfs_json_schema(0, 1);
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data = fnvlist_alloc();
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fnvlist_add_nvlist(cb.cb_jsobj, "datasets", data);
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fnvlist_free(data);
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break;
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case ZFS_OPTION_JSON_NUMS_AS_INT:
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cb.cb_json_as_int = B_TRUE;
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cb.cb_literal = B_TRUE;
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break;
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case 'H':
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cb.cb_scripted = B_TRUE;
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break;
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@ -3897,6 +3977,12 @@ found3:;
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argc -= optind;
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argv += optind;
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if (!cb.cb_json && cb.cb_json_as_int) {
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(void) fprintf(stderr, gettext("'--json-int' only works with"
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" '-j' option\n"));
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usage(B_FALSE);
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}
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/*
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* If "-o space" and no types were specified, don't display snapshots.
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*/
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@ -3936,6 +4022,11 @@ found3:;
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ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
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limit, list_callback, &cb);
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if (ret == 0 && cb.cb_json)
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zcmd_print_json(cb.cb_jsobj);
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else if (ret != 0 && cb.cb_json)
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nvlist_free(cb.cb_jsobj);
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zprop_free_list(cb.cb_proplist);
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zfs_free_sort_columns(sortcol);
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@ -41,6 +41,7 @@
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.Cm list
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.Op Fl r Ns | Ns Fl d Ar depth
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.Op Fl Hp
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.Op Fl j Op Ar --json-int
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.Oo Fl o Ar property Ns Oo , Ns Ar property Oc Ns … Oc
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.Oo Fl s Ar property Oc Ns …
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.Oo Fl S Ar property Oc Ns …
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@ -70,6 +71,11 @@ The following fields are displayed:
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Used for scripting mode.
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Do not print headers and separate fields by a single tab instead of arbitrary
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white space.
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.It Fl j Op Ar --json-int
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Print the output in JSON format.
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Specify
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.Sy --json-int
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to print the numbers in integer format instead of strings in JSON output.
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.It Fl d Ar depth
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Recursively display any children of the dataset, limiting the recursion to
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.Ar depth .
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@ -186,6 +192,161 @@ pool/home 315K 457G 21K /export/home
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pool/home/anne 18K 457G 18K /export/home/anne
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pool/home/bob 276K 457G 276K /export/home/bob
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.Ed
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.Ss Example 2 : No Listing ZFS filesystems and snapshots in JSON format
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm list Fl j Fl t Ar filesystem,snapshot | Cm jq
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{
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"output_version": {
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"command": "zfs list",
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"vers_major": 0,
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"vers_minor": 1
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},
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"datasets": {
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"pool": {
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"name": "pool",
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"type": "FILESYSTEM",
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"pool": "pool",
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"properties": {
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"used": {
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"value": "290K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"available": {
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"value": "30.5G",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"referenced": {
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"value": "24K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"mountpoint": {
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"value": "/pool",
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"source": {
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"type": "DEFAULT",
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"data": "-"
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}
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}
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}
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},
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"pool/home": {
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"name": "pool/home",
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"type": "FILESYSTEM",
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"pool": "pool",
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"properties": {
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"used": {
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"value": "48K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"available": {
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"value": "30.5G",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"referenced": {
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"value": "24K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"mountpoint": {
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"value": "/mnt/home",
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"source": {
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"type": "LOCAL",
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"data": "-"
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}
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}
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}
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},
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"pool/home/bob": {
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"name": "pool/home/bob",
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"type": "FILESYSTEM",
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"pool": "pool",
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"properties": {
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"used": {
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"value": "24K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"available": {
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"value": "30.5G",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"referenced": {
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"value": "24K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"mountpoint": {
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"value": "/mnt/home/bob",
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"source": {
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"type": "INHERITED",
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"data": "pool/home"
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}
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}
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}
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},
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"pool/home/bob@v1": {
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"name": "pool/home/bob@v1",
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"type": "SNAPSHOT",
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"pool": "pool",
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"dataset": "pool/home/bob",
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"snapshot_name": "v1",
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"properties": {
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"used": {
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"value": "0B",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"available": {
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"value": "-",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"referenced": {
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"value": "24K",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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},
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"mountpoint": {
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"value": "-",
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"source": {
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"type": "NONE",
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"data": "-"
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}
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}
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}
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}
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}
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}
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.Ed
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.
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.Sh SEE ALSO
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.Xr zfsprops 7 ,
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