[dm-devel] [PATCH 22/29] multipath: Implement 'property' blacklist
Hannes Reinecke
hare at suse.de
Mon Jul 15 13:00:23 UTC 2013
Multipath can only handle device properly which support the VPD
page 0x83. Originally this was ensured by 'scsi_id', which would
not present an ID_SERIAL value in these cases.
With the move to udev 'ID_SERIAL' is now always present, so
multipath would try to attach to _all_ SCSI devices.
This patch implements an 'property' blacklist, which allows to
blacklist a device based on the existence of udev properties.
Any device not providing the udev property from the whitelist
will be ignored.
The default whitelist is set to '(ID_WWN|ID_SCSI_VPD)'.
Signed-off-by: Hannes Reinecke <hare at suse.de>
---
libmultipath/blacklist.c | 105 +++++++++++++++++++++++++++++++++++---------
libmultipath/blacklist.h | 19 +++++---
libmultipath/config.c | 19 +++++++-
libmultipath/config.h | 2 +
libmultipath/dict.c | 36 ++++++++++++++-
libmultipath/discovery.c | 3 ++
libmultipath/print.c | 31 +++++++++++++
multipath.conf.defaults | 1 +
multipath/multipath.conf.5 | 19 +++++++-
9 files changed, 203 insertions(+), 32 deletions(-)
diff --git a/libmultipath/blacklist.c b/libmultipath/blacklist.c
index 49a40f9..d597350 100644
--- a/libmultipath/blacklist.c
+++ b/libmultipath/blacklist.c
@@ -2,6 +2,7 @@
* Copyright (c) 2004, 2005 Christophe Varoqui
*/
#include <stdio.h>
+#include <libudev.h>
#include "checkers.h"
#include "memory.h"
@@ -96,7 +97,7 @@ set_ble_device (vector blist, char * vendor, char * product, int origin)
}
int
-_blacklist_exceptions (vector elist, char * str)
+_blacklist_exceptions (vector elist, const char * str)
{
int i;
struct blentry * ele;
@@ -109,7 +110,7 @@ _blacklist_exceptions (vector elist, char * str)
}
int
-_blacklist (vector blist, char * str)
+_blacklist (vector blist, const char * str)
{
int i;
struct blentry * ble;
@@ -175,6 +176,12 @@ setup_default_blist (struct config * conf)
if (store_ble(conf->blist_devnode, str, ORIGIN_DEFAULT))
return 1;
+ str = STRDUP("(ID_SCSI_VPD|ID_WWN)");
+ if (!str)
+ return 1;
+ if (store_ble(conf->elist_property, str, ORIGIN_DEFAULT))
+ return 1;
+
vector_foreach_slot (conf->hwtable, hwe, i) {
if (hwe->bl_product) {
if (_blacklist_device(conf->blist_device, hwe->vendor,
@@ -196,16 +203,20 @@ setup_default_blist (struct config * conf)
return 0;
}
-#define LOG_BLIST(M) \
- if (vendor && product) \
- condlog(3, "%s: (%s:%s) %s", dev, vendor, product, (M)); \
- else if (wwid) \
- condlog(3, "%s: (%s) %s", dev, wwid, (M)); \
- else \
- condlog(3, "%s: %s", dev, (M))
+#define LOG_BLIST(M,S) \
+ if (vendor && product) \
+ condlog(3, "%s: (%s:%s) %s %s", \
+ dev, vendor, product, (M), (S)); \
+ else if (wwid) \
+ condlog(3, "%s: %s %s %s", dev, (M), wwid, (S)); \
+ else if (env) \
+ condlog(3, "%s: %s %s %s", dev, (M), env, (S)); \
+ else \
+ condlog(3, "%s: %s %s", dev, (M), (S))
void
-log_filter (char *dev, char *vendor, char *product, char *wwid, int r)
+log_filter (const char *dev, char *vendor, char *product, char *wwid,
+ const char *env, int r)
{
/*
* Try to sort from most likely to least.
@@ -214,22 +225,31 @@ log_filter (char *dev, char *vendor, char *product, char *wwid, int r)
case MATCH_NOTHING:
break;
case MATCH_DEVICE_BLIST:
- LOG_BLIST("vendor/product blacklisted");
+ LOG_BLIST("vendor/product", "blacklisted");
break;
case MATCH_WWID_BLIST:
- LOG_BLIST("wwid blacklisted");
+ LOG_BLIST("wwid", "blacklisted");
break;
case MATCH_DEVNODE_BLIST:
- LOG_BLIST("device node name blacklisted");
+ LOG_BLIST("device node name", "blacklisted");
+ break;
+ case MATCH_PROPERTY_BLIST:
+ LOG_BLIST("udev property", "blacklisted");
break;
case MATCH_DEVICE_BLIST_EXCEPT:
- LOG_BLIST("vendor/product whitelisted");
+ LOG_BLIST("vendor/product", "whitelisted");
break;
case MATCH_WWID_BLIST_EXCEPT:
- LOG_BLIST("wwid whitelisted");
+ LOG_BLIST("wwid", "whitelisted");
break;
case MATCH_DEVNODE_BLIST_EXCEPT:
- LOG_BLIST("device node name whitelisted");
+ LOG_BLIST("device node name", "whitelisted");
+ break;
+ case MATCH_PROPERTY_BLIST_EXCEPT:
+ LOG_BLIST("udev property", "whitelisted");
+ break;
+ case MATCH_PROPERTY_BLIST_MISSING:
+ LOG_BLIST("blacklisted,", "udev property missing");
break;
}
}
@@ -250,7 +270,7 @@ int
filter_device (vector blist, vector elist, char * vendor, char * product)
{
int r = _filter_device(blist, elist, vendor, product);
- log_filter(NULL, vendor, product, NULL, r);
+ log_filter(NULL, vendor, product, NULL, NULL, r);
return r;
}
@@ -270,7 +290,7 @@ int
filter_devnode (vector blist, vector elist, char * dev)
{
int r = _filter_devnode(blist, elist, dev);
- log_filter(dev, NULL, NULL, NULL, r);
+ log_filter(dev, NULL, NULL, NULL, NULL, r);
return r;
}
@@ -290,7 +310,7 @@ int
filter_wwid (vector blist, vector elist, char * wwid)
{
int r = _filter_wwid(blist, elist, wwid);
- log_filter(NULL, NULL, NULL, wwid, r);
+ log_filter(NULL, NULL, NULL, wwid, NULL, r);
return r;
}
@@ -314,10 +334,55 @@ int
filter_path (struct config * conf, struct path * pp)
{
int r=_filter_path(conf, pp);
- log_filter(pp->dev, pp->vendor_id, pp->product_id, pp->wwid, r);
+ log_filter(pp->dev, pp->vendor_id, pp->product_id, pp->wwid, NULL, r);
return r;
}
+int
+_filter_property (struct config *conf, const char *env)
+{
+ if (_blacklist_exceptions(conf->elist_property, env))
+ return MATCH_PROPERTY_BLIST_EXCEPT;
+ if (_blacklist(conf->blist_property, env))
+ return MATCH_PROPERTY_BLIST;
+
+ return 0;
+}
+
+int
+filter_property(struct config * conf, struct udev_device * udev)
+{
+ const char *devname = udev_device_get_sysname(udev);
+ struct udev_list_entry *list_entry;
+ int r;
+
+ if (!udev)
+ return 0;
+
+ udev_list_entry_foreach(list_entry,
+ udev_device_get_properties_list_entry(udev)) {
+ const char *env;
+
+ env = udev_list_entry_get_name(list_entry);
+ if (!env)
+ continue;
+
+ r = _filter_property(conf, env);
+ if (r) {
+ log_filter(devname, NULL, NULL, NULL, env, r);
+ return r;
+ }
+ }
+
+ /*
+ * This is the inverse of the 'normal' matching;
+ * the environment variable _has_ to match.
+ */
+ log_filter(devname, NULL, NULL, NULL, NULL,
+ MATCH_PROPERTY_BLIST_MISSING);
+ return MATCH_PROPERTY_BLIST_MISSING;
+}
+
void
free_blacklist (vector blist)
{
diff --git a/libmultipath/blacklist.h b/libmultipath/blacklist.h
index cdbebef..0e90e9a 100644
--- a/libmultipath/blacklist.h
+++ b/libmultipath/blacklist.h
@@ -1,15 +1,19 @@
#ifndef _BLACKLIST_H
#define _BLACKLIST_H
+#include <libudev.h>
#include "regex.h"
-#define MATCH_NOTHING 0
-#define MATCH_WWID_BLIST 1
-#define MATCH_DEVICE_BLIST 2
-#define MATCH_DEVNODE_BLIST 3
-#define MATCH_WWID_BLIST_EXCEPT -MATCH_WWID_BLIST
-#define MATCH_DEVICE_BLIST_EXCEPT -MATCH_DEVICE_BLIST
-#define MATCH_DEVNODE_BLIST_EXCEPT -MATCH_DEVNODE_BLIST
+#define MATCH_NOTHING 0
+#define MATCH_WWID_BLIST 1
+#define MATCH_DEVICE_BLIST 2
+#define MATCH_DEVNODE_BLIST 3
+#define MATCH_PROPERTY_BLIST 4
+#define MATCH_PROPERTY_BLIST_MISSING 5
+#define MATCH_WWID_BLIST_EXCEPT -MATCH_WWID_BLIST
+#define MATCH_DEVICE_BLIST_EXCEPT -MATCH_DEVICE_BLIST
+#define MATCH_DEVNODE_BLIST_EXCEPT -MATCH_DEVNODE_BLIST
+#define MATCH_PROPERTY_BLIST_EXCEPT -MATCH_PROPERTY_BLIST
struct blentry {
char * str;
@@ -31,6 +35,7 @@ int filter_devnode (vector, vector, char *);
int filter_wwid (vector, vector, char *);
int filter_device (vector, vector, char *, char *);
int filter_path (struct config *, struct path *);
+int filter_property(struct config *, struct udev_device *);
int store_ble (vector, char *, int);
int set_ble_device (vector, char *, char *, int);
void free_blacklist (vector);
diff --git a/libmultipath/config.c b/libmultipath/config.c
index 8013a07..9b7adda 100644
--- a/libmultipath/config.c
+++ b/libmultipath/config.c
@@ -513,10 +513,12 @@ free_config (struct config * conf)
free_blacklist(conf->blist_devnode);
free_blacklist(conf->blist_wwid);
+ free_blacklist(conf->blist_property);
free_blacklist_device(conf->blist_device);
free_blacklist(conf->elist_devnode);
free_blacklist(conf->elist_wwid);
+ free_blacklist(conf->elist_property);
free_blacklist_device(conf->elist_device);
free_mptable(conf->mptable);
@@ -619,8 +621,12 @@ load_config (char * file, struct udev *udev)
if (!conf->blist_device)
goto out;
}
- if (setup_default_blist(conf))
- goto out;
+ if (conf->blist_property == NULL) {
+ conf->blist_property = vector_alloc();
+
+ if (!conf->blist_property)
+ goto out;
+ }
if (conf->elist_devnode == NULL) {
conf->elist_devnode = vector_alloc();
@@ -642,6 +648,15 @@ load_config (char * file, struct udev *udev)
goto out;
}
+ if (conf->elist_property == NULL) {
+ conf->elist_property = vector_alloc();
+
+ if (!conf->elist_property)
+ goto out;
+ }
+ if (setup_default_blist(conf))
+ goto out;
+
if (conf->mptable == NULL) {
conf->mptable = vector_alloc();
if (!conf->mptable)
diff --git a/libmultipath/config.h b/libmultipath/config.h
index ca65f88..9c467e8 100644
--- a/libmultipath/config.h
+++ b/libmultipath/config.h
@@ -136,9 +136,11 @@ struct config {
vector blist_devnode;
vector blist_wwid;
vector blist_device;
+ vector blist_property;
vector elist_devnode;
vector elist_wwid;
vector elist_device;
+ vector elist_property;
};
struct config * conf;
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 0408e03..0bf9587 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -691,8 +691,10 @@ blacklist_handler(vector strvec)
conf->blist_devnode = vector_alloc();
conf->blist_wwid = vector_alloc();
conf->blist_device = vector_alloc();
+ conf->blist_property = vector_alloc();
- if (!conf->blist_devnode || !conf->blist_wwid || !conf->blist_device)
+ if (!conf->blist_devnode || !conf->blist_wwid ||
+ !conf->blist_device || !conf->blist_property)
return 1;
return 0;
@@ -704,8 +706,10 @@ blacklist_exceptions_handler(vector strvec)
conf->elist_devnode = vector_alloc();
conf->elist_wwid = vector_alloc();
conf->elist_device = vector_alloc();
+ conf->elist_property = vector_alloc();
- if (!conf->elist_devnode || !conf->elist_wwid || !conf->elist_device)
+ if (!conf->elist_devnode || !conf->elist_wwid ||
+ !conf->elist_device || !conf->elist_property)
return 1;
return 0;
@@ -764,6 +768,32 @@ ble_except_wwid_handler(vector strvec)
}
static int
+ble_property_handler(vector strvec)
+{
+ char * buff;
+
+ buff = set_value(strvec);
+
+ if (!buff)
+ return 1;
+
+ return store_ble(conf->blist_property, buff, ORIGIN_CONFIG);
+}
+
+static int
+ble_except_property_handler(vector strvec)
+{
+ char * buff;
+
+ buff = set_value(strvec);
+
+ if (!buff)
+ return 1;
+
+ return store_ble(conf->elist_property, buff, ORIGIN_CONFIG);
+}
+
+static int
ble_device_handler(vector strvec)
{
return alloc_ble_device(conf->blist_device);
@@ -2830,6 +2860,7 @@ init_keywords(void)
install_keyword_root("blacklist", &blacklist_handler);
install_keyword_multi("devnode", &ble_devnode_handler, &snprint_ble_simple);
install_keyword_multi("wwid", &ble_wwid_handler, &snprint_ble_simple);
+ install_keyword_multi("property", &ble_property_handler, &snprint_ble_simple);
install_keyword_multi("device", &ble_device_handler, NULL);
install_sublevel();
install_keyword("vendor", &ble_vendor_handler, &snprint_bled_vendor);
@@ -2838,6 +2869,7 @@ init_keywords(void)
install_keyword_root("blacklist_exceptions", &blacklist_exceptions_handler);
install_keyword_multi("devnode", &ble_except_devnode_handler, &snprint_ble_simple);
install_keyword_multi("wwid", &ble_except_wwid_handler, &snprint_ble_simple);
+ install_keyword_multi("property", &ble_except_property_handler, &snprint_ble_simple);
install_keyword_multi("device", &ble_except_device_handler, NULL);
install_sublevel();
install_keyword("vendor", &ble_except_vendor_handler, &snprint_bled_vendor);
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 82f086b..e9c6a50 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -82,6 +82,9 @@ path_discover (vector pathvec, struct config * conf,
if (!devname)
return 0;
+ if (filter_property(conf, udevice) > 0)
+ return 0;
+
if (filter_devnode(conf->blist_devnode, conf->elist_devnode,
(char *)devname) > 0)
return 0;
diff --git a/libmultipath/print.c b/libmultipath/print.c
index b6d08b7..7feeb26 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -1078,6 +1078,19 @@ snprint_blacklist_report (char * buff, int len)
if ((len - fwd - threshold) <= 0)
return len;
+ fwd += snprintf(buff + fwd, len - fwd, "udev property rules:\n"
+ "- blacklist:\n");
+ if (!snprint_blacklist_group(buff, len, &fwd, &conf->blist_property))
+ return len;
+
+ if ((len - fwd - threshold) <= 0)
+ return len;
+ fwd += snprintf(buff + fwd, len - fwd, "- exceptions:\n");
+ if (snprint_blacklist_group(buff, len, &fwd, &conf->elist_property) == 0)
+ return len;
+
+ if ((len - fwd - threshold) <= 0)
+ return len;
fwd += snprintf(buff + fwd, len - fwd, "wwid rules:\n"
"- blacklist:\n");
if (snprint_blacklist_group(buff, len, &fwd, &conf->blist_wwid) == 0)
@@ -1143,6 +1156,15 @@ snprint_blacklist (char * buff, int len)
if (fwd > len)
return len;
}
+ vector_foreach_slot (conf->blist_property, ble, i) {
+ kw = find_keyword(rootkw->sub, "property");
+ if (!kw)
+ return 0;
+ fwd += snprint_keyword(buff + fwd, len - fwd, "\t%k %v\n",
+ kw, ble);
+ if (fwd > len)
+ return len;
+ }
rootkw = find_keyword(rootkw->sub, "device");
if (!rootkw)
return 0;
@@ -1211,6 +1233,15 @@ snprint_blacklist_except (char * buff, int len)
if (fwd > len)
return len;
}
+ vector_foreach_slot (conf->elist_property, ele, i) {
+ kw = find_keyword(rootkw->sub, "property");
+ if (!kw)
+ return 0;
+ fwd += snprint_keyword(buff + fwd, len - fwd, "\t%k %v\n",
+ kw, ele);
+ if (fwd > len)
+ return len;
+ }
rootkw = find_keyword(rootkw->sub, "device");
if (!rootkw)
return 0;
diff --git a/multipath.conf.defaults b/multipath.conf.defaults
index f278f1f..636c1e6 100644
--- a/multipath.conf.defaults
+++ b/multipath.conf.defaults
@@ -70,6 +70,7 @@
# }
#}
#blacklist_exceptions {
+# property "(ID_SCSI_VPD|ID_WWN)"
#}
#devices {
# device {
diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
index a937db9..0fd3035 100644
--- a/multipath/multipath.conf.5
+++ b/multipath/multipath.conf.5
@@ -422,6 +422,9 @@ The \fIWorld Wide Identification\fR of a device.
.B devnode
Regular expression of the device nodes to be excluded.
.TP
+.B property
+Regular expresion of the udev property to be excluded.
+.TP
.B device
Subsection for the device description. This subsection recognizes the
.I vendor
@@ -446,8 +449,12 @@ The following keywords are recognized:
.B wwid
The \fIWorld Wide Identification\fR of a device.
.TP
+.B property
+Regular expresion of the udev property to be whitelisted. Defaults to
+.I (ID_WWN|ID_SCSI_VPD)
+.TP
.B devnode
-Regular expression of the device nodes to be excluded.
+Regular expression of the device nodes to be whitelisted.
.TP
.B device
Subsection for the device description. This subsection recognizes the
@@ -457,6 +464,16 @@ and
keywords. For a full description of these keywords please see the
.I devices
section description.
+.LP
+The
+.I property
+blacklist and whitelist handling is different from the usual handling
+in the sense that the whitelist
+.B has
+to be set, otherwise the device will be blacklisted.
+In these cases the message
+.I blacklisted, udev property missing
+will be displayed.
.SH "multipaths section"
The only recognized attribute for the
.B multipaths
--
1.7.10.4
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