device-mapper-multipath/0069-libmultipath-cleanup-add_feature.patch
Benjamin Marzinski b1c0ea9cf1 device-mapper-multipath-0.8.7-15
Add 0067-kpartx-hold-device-open-until-partitions-have-been-c.patch
  * Fixes bz #2141860
Add 0068-libmultipath-cleanup-remove_feature.patch
Add 0069-libmultipath-cleanup-add_feature.patch
Add 0070-multipath-tests-tests-for-adding-and-removing-featur.patch
Add 0071-libmultipath-fix-queue_mode-feature-handling.patch
Add 0072-multipath-tests-tests-for-reconcile_features_with_qu.patch
Add 0073-libmultipath-prepare-proto_id-for-use-by-non-scsi-de.patch
Add 0074-libmultipath-get-nvme-path-transport-protocol.patch
Add 0075-libmultipath-enforce-queue_mode-bio-for-nmve-tcp-pat.patch
  * Fixes bz #2033080
Resolves: bz #2033080, #2141860
2022-11-14 09:22:48 -06:00

108 lines
2.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Fri, 7 Oct 2022 12:35:38 -0500
Subject: [PATCH] libmultipath: cleanup add_feature
add_feature() didn't correctly handle feature strings that used
whitespace other than spaces, which the kernel allows. It also didn't
allow adding features with multiple tokens. When it looked to see if the
feature string to be added already existed, it didn't check if the match
was part of a larger token. Finally, it did unnecessary work. By using
asprintf() to create the string, the function can be signifcantly
simplified.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
---
libmultipath/structs.c | 49 +++++++++++++++++++++---------------------
1 file changed, 24 insertions(+), 25 deletions(-)
diff --git a/libmultipath/structs.c b/libmultipath/structs.c
index 83906ffe..5dfa86a8 100644
--- a/libmultipath/structs.c
+++ b/libmultipath/structs.c
@@ -608,23 +608,33 @@ int add_feature(char **f, const char *n)
{
int c = 0, d, l;
char *e, *t;
+ const char *p;
if (!f)
return 1;
/* Nothing to do */
- if (!n || *n == '0')
+ if (!n || *n == '\0')
return 0;
- if (strchr(n, ' ') != NULL) {
- condlog(0, "internal error: feature \"%s\" contains spaces", n);
+ l = strlen(n);
+ if (isspace(*n) || isspace(*(n + l - 1))) {
+ condlog(0, "internal error: feature \"%s\" has leading or trailing spaces", n);
return 1;
}
+ p = n;
+ d = 1;
+ while (*p != '\0') {
+ if (isspace(*p) && !isspace(*(p + 1)) && *(p + 1) != '\0')
+ d++;
+ p++;
+ }
+
/* default feature is null */
if(!*f)
{
- l = asprintf(&t, "1 %s", n);
+ l = asprintf(&t, "%0d %s", d, n);
if(l == -1)
return 1;
@@ -633,35 +643,24 @@ int add_feature(char **f, const char *n)
}
/* Check if feature is already present */
- if (strstr(*f, n))
- return 0;
+ e = *f;
+ while ((e = strstr(e, n)) != NULL) {
+ if (isspace(*(e - 1)) &&
+ (isspace(*(e + l)) || *(e + l) == '\0'))
+ return 0;
+ e += l;
+ }
/* Get feature count */
c = strtoul(*f, &e, 10);
- if (*f == e || (*e != ' ' && *e != '\0')) {
+ if (*f == e || (!isspace(*e) && *e != '\0')) {
condlog(0, "parse error in feature string \"%s\"", *f);
return 1;
}
-
- /* Add 1 digit and 1 space */
- l = strlen(e) + strlen(n) + 2;
-
- c++;
- /* Check if we need more digits for feature count */
- for (d = c; d >= 10; d /= 10)
- l++;
-
- t = MALLOC(l + 1);
- if (!t)
+ c += d;
+ if (asprintf(&t, "%0d%s %s", c, e, n) < 0)
return 1;
- /* e: old feature string with leading space, or "" */
- if (*e == ' ')
- while (*(e + 1) == ' ')
- e++;
-
- snprintf(t, l + 1, "%0d%s %s", c, e, n);
-
FREE(*f);
*f = t;