[dm-devel] [PATCH 2/2] libmultipath/propsel: (re)use static const vars for origin
Benjamin Marzinski
bmarzins at redhat.com
Wed Mar 28 19:11:31 UTC 2018
On Tue, Mar 27, 2018 at 11:50:53PM +0200, Martin Wilck wrote:
> Define a set of "origin" strings and reuse them throughout the code.
> That avoids duplication and makes it easier to verify that we use
> consistent messages.
>
Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>
> Signed-off-by: Martin Wilck <mwilck at suse.com>
> ---
> libmultipath/propsel.c | 170 ++++++++++++++++++++++++++++---------------------
> 1 file changed, 98 insertions(+), 72 deletions(-)
>
> diff --git a/libmultipath/propsel.c b/libmultipath/propsel.c
> index dc24450eb775..2d3b7adfdfe2 100644
> --- a/libmultipath/propsel.c
> +++ b/libmultipath/propsel.c
> @@ -44,7 +44,19 @@ do { \
> } \
> } while(0)
>
> -static char default_origin[] = "(setting: multipath internal)";
> +static const char default_origin[] = "(setting: multipath internal)";
> +static const char hwe_origin[] =
> + "(setting: storage device configuration)";
> +static const char multipaths_origin[] =
> + "(setting: multipath.conf multipaths section)";
> +static const char conf_origin[] =
> + "(setting: multipath.conf defaults/devices section)";
> +static const char overrides_origin[] =
> + "(setting: multipath.conf overrides section)";
> +static const char cmdline_origin[] =
> + "(setting: multipath command line [-p] flag)";
> +static const char autodetect_origin[] =
> + "(setting: storage device autodetected)";
>
> #define do_default(dest, value) \
> do { \
> @@ -53,24 +65,24 @@ do { \
> } while(0)
>
> #define mp_set_mpe(var) \
> -do_set(var, mp->mpe, mp->var, "(setting: multipath.conf multipaths section)")
> +do_set(var, mp->mpe, mp->var, multipaths_origin)
> #define mp_set_hwe(var) \
> -do_set(var, mp->hwe, mp->var, "(setting: storage device configuration)")
> +do_set(var, mp->hwe, mp->var, hwe_origin)
> #define mp_set_ovr(var) \
> -do_set(var, conf->overrides, mp->var, "(setting: multipath.conf overrides section)")
> +do_set(var, conf->overrides, mp->var, overrides_origin)
> #define mp_set_conf(var) \
> -do_set(var, conf, mp->var, "(setting: multipath.conf defaults/devices section)")
> +do_set(var, conf, mp->var, conf_origin)
> #define mp_set_default(var, value) \
> do_default(mp->var, value)
>
> #define pp_set_mpe(var) \
> -do_set(var, mpe, pp->var, "(setting: multipath.conf multipaths section)")
> +do_set(var, mpe, pp->var, multipaths_origin)
> #define pp_set_hwe(var) \
> -do_set(var, pp->hwe, pp->var, "(setting: storage device configuration)")
> +do_set(var, pp->hwe, pp->var, hwe_origin)
> #define pp_set_conf(var) \
> -do_set(var, conf, pp->var, "(setting: multipath.conf defaults/devices section)")
> +do_set(var, conf, pp->var, conf_origin)
> #define pp_set_ovr(var) \
> -do_set(var, conf->overrides, pp->var, "(setting: multipath.conf overrides section)")
> +do_set(var, conf->overrides, pp->var, overrides_origin)
> #define pp_set_default(var, value) \
> do_default(pp->var, value)
>
> @@ -101,7 +113,7 @@ do { \
>
> int select_mode(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> set_attr_mpe(mode, ATTR_MODE);
> set_attr_conf(mode, ATTR_MODE);
> @@ -114,7 +126,7 @@ out:
>
> int select_uid(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> set_attr_mpe(uid, ATTR_UID);
> set_attr_conf(uid, ATTR_UID);
> @@ -127,7 +139,7 @@ out:
>
> int select_gid(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> set_attr_mpe(gid, ATTR_GID);
> set_attr_conf(gid, ATTR_GID);
> @@ -145,7 +157,8 @@ out:
> */
> int select_rr_weight(struct config *conf, struct multipath * mp)
> {
> - char *origin, buff[13];
> + const char *origin;
> + char buff[13];
>
> mp_set_mpe(rr_weight);
> mp_set_ovr(rr_weight);
> @@ -160,7 +173,8 @@ out:
>
> int select_pgfailback(struct config *conf, struct multipath * mp)
> {
> - char *origin, buff[13];
> + const char *origin;
> + char buff[13];
>
> mp_set_mpe(pgfailback);
> mp_set_ovr(pgfailback);
> @@ -175,11 +189,12 @@ out:
>
> int select_pgpolicy(struct config *conf, struct multipath * mp)
> {
> - char *origin, buff[POLICY_NAME_SIZE];
> + const char *origin;
> + char buff[POLICY_NAME_SIZE];
>
> if (conf->pgpolicy_flag > 0) {
> mp->pgpolicy = conf->pgpolicy_flag;
> - origin = "(setting: multipath command line [-p] flag)";
> + origin = cmdline_origin;
> goto out;
> }
> mp_set_mpe(pgpolicy);
> @@ -196,7 +211,7 @@ out:
>
> int select_selector(struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(selector);
> mp_set_ovr(selector);
> @@ -213,7 +228,7 @@ out:
> static void
> select_alias_prefix (struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_ovr(alias_prefix);
> mp_set_hwe(alias_prefix);
> @@ -228,17 +243,17 @@ static int
> want_user_friendly_names(struct config *conf, struct multipath * mp)
> {
>
> - char *origin;
> + const char *origin;
> int user_friendly_names;
>
> do_set(user_friendly_names, mp->mpe, user_friendly_names,
> - "(setting: multipath.conf multipaths section)");
> + multipaths_origin);
> do_set(user_friendly_names, conf->overrides, user_friendly_names,
> - "(setting: multipath.conf overrides section)");
> + overrides_origin);
> do_set(user_friendly_names, mp->hwe, user_friendly_names,
> - "(setting: storage device configuration)");
> + hwe_origin);
> do_set(user_friendly_names, conf, user_friendly_names,
> - "(setting: multipath.conf defaults/devices section)");
> + conf_origin);
> do_default(user_friendly_names, DEFAULT_USER_FRIENDLY_NAMES);
> out:
> condlog(3, "%s: user_friendly_names = %s %s", mp->wwid,
> @@ -249,11 +264,11 @@ out:
>
> int select_alias(struct config *conf, struct multipath * mp)
> {
> - char *origin = NULL;
> + const char *origin = NULL;
>
> if (mp->mpe && mp->mpe->alias) {
> mp->alias = STRDUP(mp->mpe->alias);
> - origin = "(setting: multipath.conf multipaths section)";
> + origin = multipaths_origin;
> goto out;
> }
>
> @@ -342,7 +357,7 @@ void reconcile_features_with_options(const char *id, char **features, int* no_pa
>
> int select_features(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(features);
> mp_set_ovr(features);
> @@ -441,11 +456,12 @@ check_rdac(struct path * pp)
>
> int select_checker(struct config *conf, struct path *pp)
> {
> - char *origin, *checker_name;
> + const char *origin;
> + char *checker_name;
> struct checker * c = &pp->checker;
>
> if (pp->detect_checker == DETECT_CHECKER_ON) {
> - origin = "(setting: storage device autodetected)";
> + origin = autodetect_origin;
> if (check_rdac(pp)) {
> checker_name = RDAC;
> goto out;
> @@ -454,32 +470,32 @@ int select_checker(struct config *conf, struct path *pp)
> goto out;
> }
> }
> - do_set(checker_name, conf->overrides, checker_name, "(setting: multipath.conf overrides section)");
> - do_set(checker_name, pp->hwe, checker_name, "(setting: storage device configuration)");
> - do_set(checker_name, conf, checker_name, "(setting: multipath.conf defaults/devices section)");
> + do_set(checker_name, conf->overrides, checker_name, overrides_origin);
> + do_set(checker_name, pp->hwe, checker_name, hwe_origin);
> + do_set(checker_name, conf, checker_name, conf_origin);
> do_default(checker_name, DEFAULT_CHECKER);
> out:
> checker_get(conf->multipath_dir, c, checker_name);
> condlog(3, "%s: path_checker = %s %s", pp->dev, c->name, origin);
> if (conf->checker_timeout) {
> c->timeout = conf->checker_timeout;
> - condlog(3, "%s: checker timeout = %u s (setting: multipath.conf defaults/devices section)",
> - pp->dev, c->timeout);
> + condlog(3, "%s: checker timeout = %u s %s",
> + pp->dev, c->timeout, conf_origin);
> }
> else if (sysfs_get_timeout(pp, &c->timeout) > 0)
> condlog(3, "%s: checker timeout = %u s (setting: kernel sysfs)",
> - pp->dev, c->timeout);
> + pp->dev, c->timeout);
> else {
> c->timeout = DEF_TIMEOUT;
> - condlog(3, "%s: checker timeout = %u s (setting: multipath internal)",
> - pp->dev, c->timeout);
> + condlog(3, "%s: checker timeout = %u s %s",
> + pp->dev, c->timeout, default_origin);
> }
> return 0;
> }
>
> int select_getuid(struct config *conf, struct path *pp)
> {
> - char *origin;
> + const char *origin;
>
> pp->uid_attribute = parse_uid_attribute_by_attrs(conf->uid_attrs, pp->dev);
> if (pp->uid_attribute) {
> @@ -531,24 +547,24 @@ do { \
>
> int select_prio(struct config *conf, struct path *pp)
> {
> - char *origin;
> + const char *origin;
> struct mpentry * mpe;
> struct prio * p = &pp->prio;
>
> if (pp->detect_prio == DETECT_PRIO_ON) {
> detect_prio(conf, pp);
> if (prio_selected(p)) {
> - origin = "(setting: storage device autodetected)";
> + origin = autodetect_origin;
> goto out;
> }
> }
> mpe = find_mpe(conf->mptable, pp->wwid);
> - set_prio(conf->multipath_dir, mpe, "(setting: multipath.conf multipaths section)");
> - set_prio(conf->multipath_dir, conf->overrides, "(setting: multipath.conf overrides section)");
> - set_prio(conf->multipath_dir, pp->hwe, "(setting: storage device configuration)");
> - set_prio(conf->multipath_dir, conf, "(setting: multipath.conf defaults/devices section)");
> + set_prio(conf->multipath_dir, mpe, multipaths_origin);
> + set_prio(conf->multipath_dir, conf->overrides, overrides_origin);
> + set_prio(conf->multipath_dir, pp->hwe, hwe_origin);
> + set_prio(conf->multipath_dir, conf, conf_origin);
> prio_get(conf->multipath_dir, p, DEFAULT_PRIO, DEFAULT_PRIO_ARGS);
> - origin = "(setting: multipath internal)";
> + origin = default_origin;
> out:
> /*
> * fetch tpgs mode for alua, if its not already obtained
> @@ -568,7 +584,7 @@ out:
>
> int select_no_path_retry(struct config *conf, struct multipath *mp)
> {
> - char *origin = NULL;
> + const char *origin = NULL;
> char buff[12];
>
> if (mp->disable_queueing) {
> @@ -586,20 +602,20 @@ out:
> condlog(3, "%s: no_path_retry = %s %s", mp->alias, buff,
> origin);
> else
> - condlog(3, "%s: no_path_retry = undef (setting: multipath internal)",
> - mp->alias);
> + condlog(3, "%s: no_path_retry = undef %s",
> + mp->alias, default_origin);
> return 0;
> }
>
> int
> select_minio_rq (struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> - do_set(minio_rq, mp->mpe, mp->minio, "(setting: multipath.conf multipaths section)");
> - do_set(minio_rq, conf->overrides, mp->minio, "(setting: multipath.conf overrides section)");
> - do_set(minio_rq, mp->hwe, mp->minio, "(setting: storage device configuration)");
> - do_set(minio_rq, conf, mp->minio, "(setting: multipath.conf defaults/devices section)");
> + do_set(minio_rq, mp->mpe, mp->minio, multipaths_origin);
> + do_set(minio_rq, conf->overrides, mp->minio, overrides_origin);
> + do_set(minio_rq, mp->hwe, mp->minio, hwe_origin);
> + do_set(minio_rq, conf, mp->minio, conf_origin);
> do_default(mp->minio, DEFAULT_MINIO_RQ);
> out:
> condlog(3, "%s: minio = %i %s", mp->alias, mp->minio, origin);
> @@ -609,7 +625,7 @@ out:
> int
> select_minio_bio (struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(minio);
> mp_set_ovr(minio);
> @@ -633,7 +649,8 @@ int select_minio(struct config *conf, struct multipath *mp)
>
> int select_fast_io_fail(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_ovr(fast_io_fail);
> mp_set_hwe(fast_io_fail);
> @@ -647,7 +664,8 @@ out:
>
> int select_dev_loss(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_ovr(dev_loss);
> mp_set_hwe(dev_loss);
> @@ -662,7 +680,7 @@ out:
>
> int select_flush_on_last_del(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(flush_on_last_del);
> mp_set_ovr(flush_on_last_del);
> @@ -677,12 +695,13 @@ out:
>
> int select_reservation_key(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[PRKEY_SIZE];
> + const char *origin;
> + char buff[PRKEY_SIZE];
> char *from_file = "";
> uint64_t prkey = 0;
>
> - do_prkey_set(mp->mpe, "(setting: multipath.conf multipaths section)");
> - do_prkey_set(conf, "(setting: multipath.conf defaults/devices section)");
> + do_prkey_set(mp->mpe, multipaths_origin);
> + do_prkey_set(conf, conf_origin);
> put_be64(mp->reservation_key, 0);
> mp->prkey_source = PRKEY_SOURCE_NONE;
> return 0;
> @@ -703,7 +722,7 @@ out:
>
> int select_retain_hwhandler(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
> unsigned int minv_dm_retain[3] = {1, 5, 0};
>
> if (!VERSION_GE(conf->version, minv_dm_retain)) {
> @@ -729,7 +748,7 @@ out:
>
> int select_detect_prio(struct config *conf, struct path *pp)
> {
> - char *origin;
> + const char *origin;
>
> pp_set_ovr(detect_prio);
> pp_set_hwe(detect_prio);
> @@ -743,7 +762,7 @@ out:
>
> int select_detect_checker(struct config *conf, struct path *pp)
> {
> - char *origin;
> + const char *origin;
>
> pp_set_ovr(detect_checker);
> pp_set_hwe(detect_checker);
> @@ -758,7 +777,7 @@ out:
>
> int select_deferred_remove(struct config *conf, struct multipath *mp)
> {
> - char *origin;
> + const char *origin;
>
> #ifndef LIBDM_API_DEFERRED
> mp->deferred_remove = DEFERRED_REMOVE_OFF;
> @@ -783,7 +802,8 @@ out:
>
> int select_delay_watch_checks(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(delay_watch_checks);
> mp_set_ovr(delay_watch_checks);
> @@ -798,7 +818,8 @@ out:
>
> int select_delay_wait_checks(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(delay_wait_checks);
> mp_set_ovr(delay_wait_checks);
> @@ -814,7 +835,8 @@ out:
>
> int select_marginal_path_err_sample_time(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(marginal_path_err_sample_time);
> mp_set_ovr(marginal_path_err_sample_time);
> @@ -830,7 +852,8 @@ out:
>
> int select_marginal_path_err_rate_threshold(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(marginal_path_err_rate_threshold);
> mp_set_ovr(marginal_path_err_rate_threshold);
> @@ -846,7 +869,8 @@ out:
>
> int select_marginal_path_err_recheck_gap_time(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(marginal_path_err_recheck_gap_time);
> mp_set_ovr(marginal_path_err_recheck_gap_time);
> @@ -862,7 +886,8 @@ out:
>
> int select_marginal_path_double_failed_time(struct config *conf, struct multipath *mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(marginal_path_double_failed_time);
> mp_set_ovr(marginal_path_double_failed_time);
> @@ -878,7 +903,7 @@ out:
>
> int select_skip_kpartx (struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(skip_kpartx);
> mp_set_ovr(skip_kpartx);
> @@ -894,7 +919,7 @@ out:
>
> int select_max_sectors_kb(struct config *conf, struct multipath * mp)
> {
> - char *origin;
> + const char *origin;
>
> mp_set_mpe(max_sectors_kb);
> mp_set_ovr(max_sectors_kb);
> @@ -915,7 +940,8 @@ out:
>
> int select_ghost_delay (struct config *conf, struct multipath * mp)
> {
> - char *origin, buff[12];
> + const char *origin;
> + char buff[12];
>
> mp_set_mpe(ghost_delay);
> mp_set_ovr(ghost_delay);
> --
> 2.16.1
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