[dm-devel] [PATCH 6/9] libmultipath: print.c: fail hard if keywords are not found
mwilck at suse.com
mwilck at suse.com
Thu Jul 15 10:52:20 UTC 2021
From: Martin Wilck <mwilck at suse.com>
A failure in find_keyword() means an internal error. Fail hard rather
than returning an empty string.
Signed-off-by: Martin Wilck <mwilck at suse.com>
---
libmultipath/print.c | 101 +++++++++++++++----------------------------
1 file changed, 35 insertions(+), 66 deletions(-)
diff --git a/libmultipath/print.c b/libmultipath/print.c
index 4bf2f7c..5b86483 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -10,6 +10,7 @@
#include <unistd.h>
#include <string.h>
#include <errno.h>
+#include <assert.h>
#include <libudev.h>
#include "checkers.h"
@@ -1294,14 +1295,9 @@ snprint_hwentry (const struct config *conf,
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "devices");
-
- if (!rootkw || !rootkw->sub)
- return 0;
-
+ assert(rootkw && rootkw->sub);
rootkw = find_keyword(conf->keywords, rootkw->sub, "device");
-
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "\tdevice {\n")) < 0)
return rc;
@@ -1324,8 +1320,7 @@ static int snprint_hwtable(const struct config *conf, struct strbuf *buff,
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "devices");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "devices {\n")) < 0)
return rc;
@@ -1355,8 +1350,7 @@ snprint_mpentry (const struct config *conf, struct strbuf *buff,
return 0;
rootkw = find_keyword(conf->keywords, NULL, "multipath");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "\tmultipath {\n")) < 0)
return rc;
@@ -1387,8 +1381,7 @@ static int snprint_mptable(const struct config *conf, struct strbuf *buff,
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "multipaths");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "multipaths {\n")) < 0)
return rc;
@@ -1435,8 +1428,7 @@ static int snprint_overrides(const struct config *conf, struct strbuf *buff,
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "overrides");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "overrides {\n")) < 0)
return rc;
@@ -1461,8 +1453,7 @@ static int snprint_defaults(const struct config *conf, struct strbuf *buff)
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "defaults");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "defaults {\n")) < 0)
return rc;
@@ -1584,63 +1575,52 @@ static int snprint_blacklist(const struct config *conf, struct strbuf *buff)
struct blentry * ble;
struct blentry_device * bled;
struct keyword *rootkw;
- struct keyword *kw;
+ struct keyword *kw, *pkw;
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "blacklist");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "blacklist {\n")) < 0)
return rc;
vector_foreach_slot (conf->blist_devnode, ble, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "devnode");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ble)) < 0)
return rc;
}
vector_foreach_slot (conf->blist_wwid, ble, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "wwid");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ble)) < 0)
return rc;
}
vector_foreach_slot (conf->blist_property, ble, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "property");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ble)) < 0)
return rc;
}
vector_foreach_slot (conf->blist_protocol, ble, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "protocol");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ble)) < 0)
return rc;
}
rootkw = find_keyword(conf->keywords, rootkw->sub, "device");
- if (!rootkw)
- return 0;
+ assert(rootkw);
+ kw = find_keyword(conf->keywords, rootkw->sub, "vendor");
+ pkw = find_keyword(conf->keywords, rootkw->sub, "product");
+ assert(kw && pkw);
vector_foreach_slot (conf->blist_device, bled, i) {
- if ((rc = append_strbuf_str(buff, "\tdevice {\n")) < 0)
- return rc;
-
- kw = find_keyword(conf->keywords, rootkw->sub, "vendor");
- if (!kw)
- return 0;
- if ((rc = snprint_keyword(buff, "\t\t%k %v\n", kw, bled)) < 0)
+ if ((rc = snprint_keyword(buff, "\tdevice {\n\t\t%k %v\n",
+ kw, bled)) < 0)
return rc;
- kw = find_keyword(conf->keywords, rootkw->sub, "product");
- if (!kw)
- return 0;
- if ((rc = snprint_keyword(buff,
- "\t\t%k %v\n\t}\n", kw, bled)) < 0)
+ if ((rc = snprint_keyword(buff, "\t\t%k %v\n\t}\n",
+ pkw, bled)) < 0)
return rc;
}
@@ -1656,63 +1636,52 @@ static int snprint_blacklist_except(const struct config *conf,
struct blentry * ele;
struct blentry_device * eled;
struct keyword *rootkw;
- struct keyword *kw;
+ struct keyword *kw, *pkw;
size_t initial_len = get_strbuf_len(buff);
rootkw = find_keyword(conf->keywords, NULL, "blacklist_exceptions");
- if (!rootkw)
- return 0;
+ assert(rootkw);
if ((rc = append_strbuf_str(buff, "blacklist_exceptions {\n")) < 0)
return rc;
vector_foreach_slot (conf->elist_devnode, ele, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "devnode");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ele)) < 0)
return rc;
}
vector_foreach_slot (conf->elist_wwid, ele, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "wwid");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ele)) < 0)
return rc;
}
vector_foreach_slot (conf->elist_property, ele, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "property");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ele)) < 0)
return rc;
}
vector_foreach_slot (conf->elist_protocol, ele, i) {
kw = find_keyword(conf->keywords, rootkw->sub, "protocol");
- if (!kw)
- return 0;
+ assert(kw);
if ((rc = snprint_keyword(buff, "\t%k %v\n", kw, ele)) < 0)
return rc;
}
rootkw = find_keyword(conf->keywords, rootkw->sub, "device");
- if (!rootkw)
- return 0;
+ assert(rootkw);
+ kw = find_keyword(conf->keywords, rootkw->sub, "vendor");
+ pkw = find_keyword(conf->keywords, rootkw->sub, "product");
+ assert(kw && pkw);
vector_foreach_slot (conf->elist_device, eled, i) {
- if ((rc = append_strbuf_str(buff, "\tdevice {\n")) < 0)
- return rc;
-
- kw = find_keyword(conf->keywords, rootkw->sub, "vendor");
- if (!kw)
- return 0;
- if ((rc = snprint_keyword(buff, "\t\t%k %v\n", kw, eled)) < 0)
+ if ((rc = snprint_keyword(buff, "\tdevice {\n\t\t%k %v\n",
+ kw, eled)) < 0)
return rc;
- kw = find_keyword(conf->keywords, rootkw->sub, "product");
- if (!kw)
- return 0;
if ((rc = snprint_keyword(buff, "\t\t%k %v\n\t}\n",
- kw, eled)) < 0)
+ pkw, eled)) < 0)
return rc;
}
--
2.32.0
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