commit 63b56f0b3ebc7939483725f5db843f32a253d617
Author: Benjamin Marzinski <bmarzins@redhat.com>
Date: Tue Feb 14 20:16:52 2017 -0600
libmultipath: add detect_checker option
This patch adds a detect_checker option that works just like the
detect_prio option. It currently only detects ALUA devices, and
if it finds ALUA support, it sets the priortizier to TUR. This is
useful for devices like the VNX2, where it should be using the
TUR checker when in ALUA mode (or so I have been told). It is set on by
default just like detect_prio and retain_attached_hw_handler.
The alua detection is now done in pathinfo, using the tpgs variable
to store the alua state.
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
@@ -343,6 +343,7 @@ merge_hwe (struct hwentry * dst, struct hwentry * src)
merge_num(user_friendly_names);
merge_num(retain_hwhandler);
merge_num(detect_prio);
+ merge_num(detect_checker);
merge_num(deferred_remove);
merge_num(delay_watch_checks);
merge_num(delay_wait_checks);
@@ -423,6 +424,7 @@ store_hwe (vector hwtable, struct hwentry * dhwe)
hwe->user_friendly_names = dhwe->user_friendly_names;
hwe->retain_hwhandler = dhwe->retain_hwhandler;
hwe->detect_prio = dhwe->detect_prio;
+ hwe->detect_checker = dhwe->detect_checker;
if (dhwe->bl_product && !(hwe->bl_product = set_param_str(dhwe->bl_product)))
goto out;
@@ -610,6 +612,7 @@ load_config (char * file)
conf->fast_io_fail = DEFAULT_FAST_IO_FAIL;
conf->retain_hwhandler = DEFAULT_RETAIN_HWHANDLER;
conf->detect_prio = DEFAULT_DETECT_PRIO;
+ conf->detect_checker = DEFAULT_DETECT_CHECKER;
conf->force_sync = DEFAULT_FORCE_SYNC;
conf->partition_delim = DEFAULT_PARTITION_DELIM;
conf->processed_main_config = 0;
@@ -62,6 +62,7 @@ struct hwentry {
int user_friendly_names;
int retain_hwhandler;
int detect_prio;
+ int detect_checker;
int deferred_remove;
int delay_watch_checks;
int delay_wait_checks;
@@ -139,6 +140,7 @@ struct config {
int reassign_maps;
int retain_hwhandler;
int detect_prio;
+ int detect_checker;
int force_sync;
int deferred_remove;
int processed_main_config;
@@ -22,6 +22,7 @@
#define DEFAULT_DEV_LOSS_TMO 600
#define DEFAULT_RETAIN_HWHANDLER RETAIN_HWHANDLER_ON
#define DEFAULT_DETECT_PRIO DETECT_PRIO_ON
+#define DEFAULT_DETECT_CHECKER DETECT_CHECKER_ON
#define DEFAULT_DEFERRED_REMOVE DEFERRED_REMOVE_OFF
#define DEFAULT_DELAY_CHECKS NU_NO
#define DEFAULT_ERR_CHECKS NU_NO
@@ -379,6 +379,13 @@ declare_ovr_snprint(detect_prio, print_yes_no_undef)
declare_hw_handler(detect_prio, set_yes_no_undef)
declare_hw_snprint(detect_prio, print_yes_no_undef)
+declare_def_handler(detect_checker, set_yes_no_undef)
+declare_def_snprint_defint(detect_checker, print_yes_no_undef, YNU_NO)
+declare_ovr_handler(detect_checker, set_yes_no_undef)
+declare_ovr_snprint(detect_checker, print_yes_no_undef)
+declare_hw_handler(detect_checker, set_yes_no_undef)
+declare_hw_snprint(detect_checker, print_yes_no_undef)
+
declare_def_handler(force_sync, set_yes_no)
declare_def_snprint(force_sync, print_yes_no)
@@ -1419,6 +1426,7 @@ init_keywords(vector keywords)
install_keyword("reservation_key", &def_reservation_key_handler, &snprint_def_reservation_key);
install_keyword("retain_attached_hw_handler", &def_retain_hwhandler_handler, &snprint_def_retain_hwhandler);
install_keyword("detect_prio", &def_detect_prio_handler, &snprint_def_detect_prio);
+ install_keyword("detect_checker", &def_detect_checker_handler, &snprint_def_detect_checker);
install_keyword("force_sync", &def_force_sync_handler, &snprint_def_force_sync);
install_keyword("strict_timing", &def_strict_timing_handler, &snprint_def_strict_timing);
install_keyword("deferred_remove", &def_deferred_remove_handler, &snprint_def_deferred_remove);
@@ -1509,6 +1517,7 @@ init_keywords(vector keywords)
install_keyword("user_friendly_names", &hw_user_friendly_names_handler, &snprint_hw_user_friendly_names);
install_keyword("retain_attached_hw_handler", &hw_retain_hwhandler_handler, &snprint_hw_retain_hwhandler);
install_keyword("detect_prio", &hw_detect_prio_handler, &snprint_hw_detect_prio);
+ install_keyword("detect_checker", &hw_detect_checker_handler, &snprint_hw_detect_checker);
install_keyword("deferred_remove", &hw_deferred_remove_handler, &snprint_hw_deferred_remove);
install_keyword("delay_watch_checks", &hw_delay_watch_checks_handler, &snprint_hw_delay_watch_checks);
install_keyword("delay_wait_checks", &hw_delay_wait_checks_handler, &snprint_hw_delay_wait_checks);
@@ -1541,6 +1550,7 @@ init_keywords(vector keywords)
install_keyword("user_friendly_names", &ovr_user_friendly_names_handler, &snprint_ovr_user_friendly_names);
install_keyword("retain_attached_hw_handler", &ovr_retain_hwhandler_handler, &snprint_ovr_retain_hwhandler);
install_keyword("detect_prio", &ovr_detect_prio_handler, &snprint_ovr_detect_prio);
+ install_keyword("detect_checker", &ovr_detect_checker_handler, &snprint_ovr_detect_checker);
install_keyword("deferred_remove", &ovr_deferred_remove_handler, &snprint_ovr_deferred_remove);
install_keyword("delay_watch_checks", &ovr_delay_watch_checks_handler, &snprint_ovr_delay_watch_checks);
install_keyword("delay_wait_checks", &ovr_delay_wait_checks_handler, &snprint_ovr_delay_wait_checks);
@@ -30,6 +30,7 @@
#include "discovery.h"
#include "prio.h"
#include "defaults.h"
+#include "prioritizers/alua_rtpg.h"
int
alloc_path_with_pathinfo (struct config *conf, struct udev_device *udevice,
@@ -829,6 +830,25 @@ get_serial (char * str, int maxlen, int fd)
return 1;
}
+static void
+detect_alua(struct path * pp, struct config *conf)
+{
+ int ret;
+ int tpgs;
+ unsigned int timeout = conf->checker_timeout;
+
+ if ((tpgs = get_target_port_group_support(pp->fd, timeout)) <= 0) {
+ pp->tpgs = TPGS_NONE;
+ return;
+ }
+ ret = get_target_port_group(pp, timeout);
+ if (ret < 0 || get_asymmetric_access_state(pp->fd, ret, timeout) < 0) {
+ pp->tpgs = TPGS_NONE;
+ return;
+ }
+ pp->tpgs = tpgs;
+}
+
#define DEFAULT_SGIO_LEN 254
static int
@@ -1425,11 +1445,14 @@ sysfs_pathinfo(struct path * pp, vector hwtable)
}
static int
-scsi_ioctl_pathinfo (struct path * pp, int mask)
+scsi_ioctl_pathinfo (struct path * pp, struct config *conf, int mask)
{
struct udev_device *parent;
const char *attr_path = NULL;
+ if (pp->tpgs == TPGS_UNDEF)
+ detect_alua(pp, conf);
+
if (!(mask & DI_SERIAL))
return 0;
@@ -1489,6 +1512,7 @@ get_state (struct path * pp, struct config *conf, int daemon)
return PATH_UNCHECKED;
}
}
+ select_detect_checker(conf, pp);
select_checker(conf, pp);
if (!checker_selected(c)) {
condlog(3, "%s: No checker selected", pp->dev);
@@ -1797,7 +1821,7 @@ int pathinfo(struct path *pp, struct config *conf, int mask)
get_geometry(pp);
if (path_state == PATH_UP && pp->bus == SYSFS_BUS_SCSI &&
- scsi_ioctl_pathinfo(pp, mask))
+ scsi_ioctl_pathinfo(pp, conf, mask))
goto blank;
if (pp->bus == SYSFS_BUS_CCISS &&
@@ -1112,6 +1112,7 @@ static struct hwentry default_hw[] = {
.dev_loss = 600,
.retain_hwhandler = RETAIN_HWHANDLER_ON,
.detect_prio = DETECT_PRIO_ON,
+ .detect_checker = DETECT_CHECKER_ON,
.deferred_remove = DEFERRED_REMOVE_OFF,
.delay_watch_checks = DELAY_CHECKS_OFF,
.delay_wait_checks = DELAY_CHECKS_OFF,
@@ -109,6 +109,7 @@ inquiry_command_set_evpd(struct inquiry_command *ic)
#define VERSION_SPC3 0x05
/* Defined TPGS field values. */
+#define TPGS_UNDEF -1
#define TPGS_NONE 0x0
#define TPGS_IMPLICIT 0x1
#define TPGS_EXPLICIT 0x2
@@ -312,6 +312,11 @@ int select_checker(struct config *conf, struct path *pp)
char *origin, *checker_name;
struct checker * c = &pp->checker;
+ if (pp->detect_checker == DETECT_CHECKER_ON && pp->tpgs > 0) {
+ checker_name = TUR;
+ origin = "(setting: array autodetected)";
+ goto out;
+ }
do_set(checker_name, conf->overrides, checker_name, "(setting: multipath.conf overrides section)");
do_set(checker_name, pp->hwe, checker_name, "(setting: array configuration)");
do_set(checker_name, conf, checker_name, "(setting: multipath.conf defaults/devices section)");
@@ -359,20 +364,11 @@ out:
void
detect_prio(struct config *conf, struct path * pp)
{
- int ret;
struct prio *p = &pp->prio;
- int tpgs = 0;
- unsigned int timeout = conf->checker_timeout;
char buff[512];
char *default_prio = PRIO_ALUA;
- if ((tpgs = get_target_port_group_support(pp->fd, timeout)) <= 0)
- return;
- pp->tpgs = tpgs;
- ret = get_target_port_group(pp, timeout);
- if (ret < 0)
- return;
- if (get_asymmetric_access_state(pp->fd, ret, timeout) < 0)
+ if (pp->tpgs <= 0)
return;
if (sysfs_get_asymmetric_access_state(pp, buff, 512) >= 0)
default_prio = PRIO_SYSFS;
@@ -588,6 +584,21 @@ out:
return 0;
}
+int select_detect_checker(struct config *conf, struct path *pp)
+{
+ char *origin;
+
+ pp_set_ovr(detect_checker);
+ pp_set_hwe(detect_checker);
+ pp_set_conf(detect_checker);
+ pp_set_default(detect_checker, DEFAULT_DETECT_CHECKER);
+out:
+ condlog(3, "%s: detect_checker = %s %s", pp->dev,
+ (pp->detect_checker == DETECT_CHECKER_ON)? "yes" : "no",
+ origin);
+ return 0;
+}
+
int select_deferred_remove(struct config *conf, struct multipath *mp)
{
char *origin;
@@ -19,6 +19,7 @@ int select_dev_loss(struct config *conf, struct multipath *mp);
int select_reservation_key(struct config *conf, struct multipath *mp);
int select_retain_hwhandler (struct config *conf, struct multipath * mp);
int select_detect_prio(struct config *conf, struct path * pp);
+int select_detect_checker(struct config *conf, struct path * pp);
int select_deferred_remove(struct config *conf, struct multipath *mp);
int select_delay_watch_checks (struct config *conf, struct multipath * mp);
int select_delay_wait_checks (struct config *conf, struct multipath * mp);
@@ -17,6 +17,7 @@
#include "structs_vec.h"
#include "blacklist.h"
#include "prio.h"
+#include "prioritizers/alua_spc3.h"
struct adapter_group *
alloc_adaptergroup(void)
@@ -96,6 +97,7 @@ alloc_path (void)
pp->sg_id.lun = -1;
pp->sg_id.proto_id = SCSI_PROTOCOL_UNSPEC;
pp->fd = -1;
+ pp->tpgs = TPGS_UNDEF;
pp->priority = PRIO_UNDEF;
}
return pp;
@@ -121,6 +121,12 @@ enum detect_prio_states {
DETECT_PRIO_ON = YNU_YES,
};
+enum detect_checker_states {
+ DETECT_CHECKER_UNDEF = YNU_UNDEF,
+ DETECT_CHECKER_OFF = YNU_NO,
+ DETECT_CHECKER_ON = YNU_YES,
+};
+
enum deferred_remove_states {
DEFERRED_REMOVE_UNDEF = YNU_UNDEF,
DEFERRED_REMOVE_OFF = YNU_NO,
@@ -210,6 +216,7 @@ struct path {
int priority;
int pgindex;
int detect_prio;
+ int detect_checker;
int watch_checks;
int wait_checks;
int tpgs;
@@ -683,6 +683,20 @@ The default is: \fByes\fR
.
.
.TP
+.B detect_checker
+if set to
+.I yes
+, multipath will try to detect if the device supports SCSI-3 ALUA. If so, the
+device will automatically use the \fItur\fR checker. If set to
+.I no
+, the checker will be selected as usual.
+.RS
+.TP
+The default is: \fByes\fR
+.RE
+.
+.
+.TP
.B force_sync
If set to
.I yes
@@ -1171,6 +1185,8 @@ section:
.TP
.B detect_prio
.TP
+.B detect_checker
+.TP
.B deferred_remove
.TP
.B san_path_err_threshold
@@ -1241,6 +1257,8 @@ the values are taken from the \fIdevices\fR or \fIdefaults\fR sections:
.TP
.B detect_prio
.TP
+.B detect_checker
+.TP
.B deferred_remove
.TP
.B san_path_err_threshold