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JSON output support for zpool version

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This commit adds support for zpool version to output in JSON format
using '-j' option. Userland kernel module version is collected in nvlist
which  is later displayed in JSON format. man page for zpool is updated.

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 2024-04-22 14:22:12 +05:00 committed by Brian Behlendorf
parent cad4c0ef1a
commit 5cbdd5ea4f
2 changed files with 70 additions and 3 deletions
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68
cmd/zpool/zpool_main.c
View File

@ -349,6 +349,8 @@ static zpool_command_t command_table[] = {
#define VDEV_ALLOC_CLASS_LOGS "logs"
#define MAX_CMD_LEN 256
static zpool_command_t *current_command;
static zfs_type_t current_prop_type = (ZFS_TYPE_POOL | ZFS_TYPE_VDEV);
static char history_str[HIS_MAX_RECORD_LEN];
@ -452,7 +454,7 @@ get_usage(zpool_help_t idx)
case HELP_SYNC:
return (gettext("\tsync [pool] ...\n"));
case HELP_VERSION:
return (gettext("\tversion\n"));
return (gettext("\tversion [-j]\n"));
case HELP_WAIT:
return (gettext("\twait [-Hp] [-T d|u] [-t <activity>[,...]] "
"<pool> [interval]\n"));
@ -10344,6 +10346,35 @@ 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;
@ -11688,8 +11719,39 @@ find_command_idx(const char *command, int *idx)
static int
zpool_do_version(int argc, char **argv)
{
(void) argc, (void) argv;
return (zfs_version_print() != 0);
int c;
nvlist_t *jsobj = NULL, *zfs_ver = NULL;
boolean_t json = B_FALSE;
while ((c = getopt(argc, argv, "j")) != -1) {
switch (c) {
case 'j':
json = B_TRUE;
jsobj = zpool_json_schema(0, 1);
break;
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
usage(B_FALSE);
}
}
argc -= optind;
if (argc != 0) {
(void) fprintf(stderr, "too many arguments\n");
usage(B_FALSE);
}
if (json) {
zfs_ver = zfs_version_nvlist();
if (zfs_ver) {
fnvlist_add_nvlist(jsobj, "zfs_version", zfs_ver);
zcmd_print_json(jsobj);
fnvlist_free(zfs_ver);
return (0);
} else
return (-1);
} else
return (zfs_version_print() != 0);
}
/* Display documentation */

5
man/man8/zpool.8
View File

@ -38,6 +38,7 @@
.Fl ?V
.Nm
.Cm version
.Op Fl j
.Nm
.Cm subcommand
.Op Ar arguments
@ -79,10 +80,14 @@ Displays a help message.
.It Xo
.Nm
.Cm version
.Op Fl j
.Xc
Displays the software version of the
.Nm
userland utility and the ZFS kernel module.
Use
.Fl j
option to output in JSON format.
.El
.
.Ss Creation