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MFV r348568: 9466 add JSON output support to channel programs

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illumos/illumos-gate@5267591016

Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Sara Hartse <sara.hartse@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Author:     Alek Pinchuk <apinchuk@datto.com>
This commit is contained in:
Alexander Motin 2019-06-03 19:15:06 +00:00
commit ce88141b27
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348570
3 changed files with 30 additions and 10 deletions
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8
cddl/contrib/opensolaris/cmd/zfs/zfs-program.8
View File

@ -9,6 +9,7 @@
.\"
.\"
.\" Copyright (c) 2016, 2017 by Delphix. All rights reserved.
.\" Copyright (c) 2018 Datto Inc.
.\"
.Dd October 02, 2017
.Dt ZFS-PROGRAM 1M
@ -18,7 +19,7 @@
.Nd executes ZFS channel programs
.Sh SYNOPSIS
.Cm zfs program
.Op Fl n
.Op Fl jn
.Op Fl t Ar instruction-limit
.Op Fl m Ar memory-limit
.Ar pool
@ -46,6 +47,11 @@ will be run on
and any attempts to access or modify other pools will cause an error.
.Sh OPTIONS
.Bl -tag -width "-t"
.It Fl j
Display channel program output in JSON format.
When this flag is specified and standard output is empty -
channel program encountered an error.
The details of such an error will be printed to standard error in plain text.
.It Fl n
Executes a read-only channel program, which runs faster.
The program cannot change on-disk state by calling functions from the

10
cddl/contrib/opensolaris/cmd/zfs/zfs.8
View File

@ -29,6 +29,7 @@
.\" Copyright (c) 2014, Xin LI <delphij@FreeBSD.org>
.\" Copyright (c) 2014-2015, The FreeBSD Foundation, All Rights Reserved.
.\" Copyright 2018 Joyent, Inc.
.\" Copyright (c) 2018 Datto Inc.
.\"
.\" $FreeBSD$
.\"
@ -291,7 +292,7 @@
.Op Ar snapshot Ns | Ns Ar filesystem
.Nm
.Cm program
.Op Fl n
.Op Fl jn
.Op Fl t Ar timeout
.Op Fl m Ar memory_limit
.Ar pool script
@ -3364,7 +3365,7 @@ Display the path's inode change time as the first column of output.
.It Xo
.Nm
.Cm program
.Op Fl n
.Op Fl jn
.Op Fl t Ar timeout
.Op Fl m Ar memory_limit
.Ar pool script
@ -3387,6 +3388,11 @@ For full documentation of the ZFS channel program interface, see the manual
page for
.Xr zfs-program 8 .
.Bl -tag -width indent
.It Fl j
Display channel program output in JSON format.
When this flag is specified and standard output is empty -
channel program encountered an error.
The details of such an error will be printed to standard error in plain text.
.It Fl n
Executes a read-only channel program, which runs faster.
The program cannot change on-disk state by calling functions from

22
cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
View File

@ -30,6 +30,7 @@
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
* Copyright 2016 Nexenta Systems, Inc.
* Copyright (c) 2018 Datto Inc.
*/
#include <assert.h>
@ -351,7 +352,7 @@ get_usage(zfs_help_t idx)
case HELP_BOOKMARK:
return (gettext("\tbookmark <snapshot> <bookmark>\n"));
case HELP_CHANNEL_PROGRAM:
return (gettext("\tprogram [-n] [-t <instruction limit>] "
return (gettext("\tprogram [-jn] [-t <instruction limit>] "
"[-m <memory limit (b)>] <pool> <program file> "
"[lua args...]\n"));
}
@ -7238,12 +7239,12 @@ zfs_do_channel_program(int argc, char **argv)
nvlist_t *outnvl;
uint64_t instrlimit = ZCP_DEFAULT_INSTRLIMIT;
uint64_t memlimit = ZCP_DEFAULT_MEMLIMIT;
boolean_t sync_flag = B_TRUE;
boolean_t sync_flag = B_TRUE, json_output = B_FALSE;
zpool_handle_t *zhp;
/* check options */
while (-1 !=
(c = getopt(argc, argv, "nt:(instr-limit)m:(memory-limit)"))) {
(c = getopt(argc, argv, "jnt:(instr-limit)m:(memory-limit)"))) {
switch (c) {
case 't':
case 'm': {
@ -7285,6 +7286,10 @@ zfs_do_channel_program(int argc, char **argv)
sync_flag = B_FALSE;
break;
}
case 'j': {
json_output = B_TRUE;
break;
}
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
@ -7407,11 +7412,14 @@ zfs_do_channel_program(int argc, char **argv)
gettext("Channel program execution failed:\n%s\n"),
errstring);
} else {
(void) printf("Channel program fully executed ");
if (nvlist_empty(outnvl)) {
(void) printf("with no return value.\n");
if (json_output) {
(void) nvlist_print_json(stdout, outnvl);
} else if (nvlist_empty(outnvl)) {
(void) fprintf(stdout, gettext("Channel program fully "
"executed and did not produce output.\n"));
} else {
(void) printf("with return value:\n");
(void) fprintf(stdout, gettext("Channel program fully "
"executed and produced output:\n"));
dump_nvlist(outnvl, 4);
}
}