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Don't run 'zpool iostat -c CMD' command on all vdevs, if vdevs specified

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zpool iostat allows you to specify only certain vdevs to display.
Currently, if you run 'zpool iostat -c CMD vdev1 vdev2 ...'
on specific vdevs, it will actually run the command on *all* vdevs,
and just display the results for the vdevs you specify.  This patch
corrects the behavior to only run the command on the specified vdevs,
and also enables the zpool_iostat_005_pos.ksh tests.
    
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #5443
This commit is contained in:
Tony Hutter 2016-12-16 16:10:45 -08:00 committed by Brian Behlendorf
parent 81eb8a1fbb
commit 1528bfdb14
5 changed files with 81 additions and 19 deletions
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30
cmd/zpool/zpool_iter.c
View File

@ -360,7 +360,7 @@ for_each_vdev_run_cb(zpool_handle_t *zhp, nvlist_t *nv, void *cb_vcdl)
vdev_cmd_data_list_t *vcdl = cb_vcdl;
vdev_cmd_data_t *data;
char *path = NULL;
int i;
int i, match = 0;
if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0)
return (1);
@ -374,6 +374,19 @@ for_each_vdev_run_cb(zpool_handle_t *zhp, nvlist_t *nv, void *cb_vcdl)
}
}
/* Check for whitelisted vdevs here, if any */
for (i = 0; i < vcdl->vdev_names_count; i++) {
if (strcmp(vcdl->vdev_names[i], zpool_vdev_name(g_zfs, zhp, nv,
vcdl->cb_name_flags)) == 0) {
match = 1;
break; /* match */
}
}
/* If we whitelisted vdevs, and this isn't one of them, then bail out */
if (!match && vcdl->vdev_names_count)
return (0);
/*
* Resize our array and add in the new element.
*/
@ -437,19 +450,28 @@ all_pools_for_each_vdev_run_vcdl(vdev_cmd_data_list_t *vcdl)
}
/*
* Run command 'cmd' on all vdevs in all pools. Saves the first line of output
* from the command in vcdk->data[].line for all vdevs.
* Run command 'cmd' on all vdevs in all pools in argv. Saves the first line of
* output from the command in vcdk->data[].line for all vdevs. If you want
* to run the command on only certain vdevs, fill in g_zfs, vdev_names,
* vdev_names_count, and cb_name_flags. Otherwise leave them as zero.
*
* Returns a vdev_cmd_data_list_t that must be freed with
* free_vdev_cmd_data_list();
*/
vdev_cmd_data_list_t *
all_pools_for_each_vdev_run(int argc, char **argv, char *cmd)
all_pools_for_each_vdev_run(int argc, char **argv, char *cmd,
libzfs_handle_t *g_zfs, char **vdev_names, int vdev_names_count,
int cb_name_flags)
{
vdev_cmd_data_list_t *vcdl;
vcdl = safe_malloc(sizeof (vdev_cmd_data_list_t));
vcdl->cmd = cmd;
vcdl->vdev_names = vdev_names;
vcdl->vdev_names_count = vdev_names_count;
vcdl->cb_name_flags = cb_name_flags;
vcdl->g_zfs = g_zfs;
/* Gather our list of all vdevs in all pools */
for_each_pool(argc, argv, B_TRUE, NULL,
all_pools_for_each_vdev_gather_cb, vcdl);

32
cmd/zpool/zpool_main.c
View File

@ -312,7 +312,7 @@ get_usage(zpool_help_t idx) {
"[-R root] [-F [-n]]\n"
"\t <pool | id> [newpool]\n"));
case HELP_IOSTAT:
return (gettext("\tiostat [-T d | u] [-ghHLpPvy] "
return (gettext("\tiostat [-c CMD] [-T d | u] [-ghHLpPvy] "
"[[-lq]|[-r|-w]]\n"
"\t [[pool ...]|[pool vdev ...]|[vdev ...]] "
"[interval [count]]\n"));
@ -335,8 +335,8 @@ get_usage(zpool_help_t idx) {
case HELP_SCRUB:
return (gettext("\tscrub [-s] <pool> ...\n"));
case HELP_STATUS:
return (gettext("\tstatus [-gLPvxD] [-T d|u] [pool] ... "
"[interval [count]]\n"));
return (gettext("\tstatus [-c CMD] [-gLPvxD] [-T d|u] [pool]"
" ... [interval [count]]\n"));
case HELP_UPGRADE:
return (gettext("\tupgrade\n"
"\tupgrade -v\n"
@ -4055,8 +4055,13 @@ zpool_do_iostat(int argc, char **argv)
usage(B_FALSE);
break;
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
if (optopt == 'c') {
fprintf(stderr,
gettext("Missing CMD for -c\n"));
} else {
fprintf(stderr,
gettext("invalid option '%c'\n"), optopt);
}
usage(B_FALSE);
}
}
@ -4256,9 +4261,10 @@ zpool_do_iostat(int argc, char **argv)
continue;
}
if (cmd != NULL)
if (cmd != NULL && cb.cb_verbose)
cb.vcdl = all_pools_for_each_vdev_run(argc,
argv, cmd);
argv, cmd, g_zfs, cb.cb_vdev_names,
cb.cb_vdev_names_count, cb.cb_name_flags);
pool_list_iter(list, B_FALSE, print_iostat, &cb);
@ -6113,8 +6119,13 @@ zpool_do_status(int argc, char **argv)
get_timestamp_arg(*optarg);
break;
case '?':
(void) fprintf(stderr, gettext("invalid option '%c'\n"),
optopt);
if (optopt == 'c') {
fprintf(stderr,
gettext("Missing CMD for -c\n"));
} else {
fprintf(stderr,
gettext("invalid option '%c'\n"), optopt);
}
usage(B_FALSE);
}
}
@ -6135,7 +6146,8 @@ zpool_do_status(int argc, char **argv)
print_timestamp(timestamp_fmt);
if (cmd != NULL)
cb.vcdl = all_pools_for_each_vdev_run(argc, argv, cmd);
cb.vcdl = all_pools_for_each_vdev_run(argc, argv, cmd,
NULL, NULL, 0, 0);
ret = for_each_pool(argc, argv, B_TRUE, NULL,
status_callback, &cb);

12
cmd/zpool/zpool_util.h
View File

@ -86,11 +86,21 @@ typedef struct vdev_cmd_data_list
{
char *cmd; /* Command to run */
unsigned int count; /* Number of vdev_cmd_data items (vdevs) */
/* vars to whitelist only certain vdevs, if requested */
libzfs_handle_t *g_zfs;
char **vdev_names;
int vdev_names_count;
int cb_name_flags;
vdev_cmd_data_t *data; /* Array of vdevs */
} vdev_cmd_data_list_t;
vdev_cmd_data_list_t *all_pools_for_each_vdev_run(int argc, char **argv,
char *cmd);
char *cmd, libzfs_handle_t *g_zfs, char **vdev_names, int vdev_names_count,
int cb_name_flags);
void free_vdev_cmd_data_list(vdev_cmd_data_list_t *vcdl);
#ifdef __cplusplus

3
tests/runfiles/linux.run
View File

@ -362,7 +362,8 @@ user =
[tests/functional/cli_user/zpool_iostat]
tests = ['zpool_iostat_001_neg', 'zpool_iostat_002_pos',
'zpool_iostat_003_neg', 'zpool_iostat_004_pos']
'zpool_iostat_003_neg', 'zpool_iostat_004_pos',
'zpool_iostat_005_pos']
user =
[tests/functional/cli_user/zpool_list]

23
tests/zfs-tests/tests/functional/cli_user/zpool_iostat/zpool_iostat_005_pos.ksh
View File

@ -54,10 +54,27 @@ fi
# a '/' when we specify the path (-P) flag. We check for "{}" to see if one
# of the VDEV variables isn't set.
#
C1=$($ZPOOL iostat -Pv | $GREP -E '^\s+/' | $WC -l)
C2=$($ZPOOL iostat -Pv -c 'echo vdev_test{$VDEV_PATH}{$VDEV_UPATH}' | $GREP -E '^\s+/' | $GREP -v '{}' | $WC -l)
C1=$($ZPOOL iostat -Pv $testpool | $GREP -E '^\s+/' | $WC -l)
C2=$($ZPOOL iostat -Pv -c 'echo vdev_test{$VDEV_PATH}{$VDEV_UPATH}' $testpool \
| $GREP -E '^\s+/' | $GREP -v '{}' | $WC -l)
if [ "$C1" != "$C2" ] ; then
log_fail "zpool iostat -c failed, expected $C1 vdevs, got $C2"
else
log_pass "zpool iostat -c passed, expected $C1 vdevs, got $C2"
log_note "zpool iostat -c passed, expected $C1 vdevs, got $C2"
fi
# Call iostat on only a specific vdev, and verify that the command only gets
# run on the vdev. We write the command results to a temp file to verify that
# the command actually gets run, rather than just verifying that the results
# are *displayed* for the specific vdev.
TMP=$($MKTEMP)
FIRST_VDEV=$($ZPOOL iostat -Pv $testpool | $GREP -Eo '^\s+/[^ ]+' | $HEAD -n 1)
log_must $ZPOOL iostat -Pv -c "echo \$VDEV_PATH >> $TMP" $testpool \
$FIRST_VDEV > /dev/null
C2=$($WC -w < $TMP)
$RM $TMP
if [ "$C2" != "1" ] ; then
log_fail "zpool iostat -c <VDEV> failed, expected 1 vdev, got $C2"
else
log_note "zpool iostat -c <VDEV> passed, expected 1 vdev, got $C2"
fi