sbd/SOURCES/0006-Refactor-fail-earlier-on-invalid-servants.patch

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2019-08-02 16:17:32 +00:00
From 8301cbafed191f30656a22876941cc7c9189b623 Mon Sep 17 00:00:00 2001
From: Klaus Wenninger <klaus.wenninger@aon.at>
Date: Thu, 31 Jan 2019 14:42:01 +0100
Subject: [PATCH] Refactor: fail earlier on invalid servants
---
src/sbd-inquisitor.c | 51 ++++++++++++++++++++++++++++++++-------------------
src/sbd-md.c | 7 +------
src/sbd.h | 2 +-
3 files changed, 34 insertions(+), 26 deletions(-)
diff --git a/src/sbd-inquisitor.c b/src/sbd-inquisitor.c
index 8e0bc87..9be6c99 100644
--- a/src/sbd-inquisitor.c
+++ b/src/sbd-inquisitor.c
@@ -42,19 +42,36 @@ void recruit_servant(const char *devname, pid_t pid)
struct servants_list_item *newbie;
if (lookup_servant_by_dev(devname)) {
- cl_log(LOG_DEBUG, "Servant %s already exists", devname);
- return;
+ cl_log(LOG_DEBUG, "Servant %s already exists", devname);
+ return;
}
newbie = malloc(sizeof(*newbie));
- if (!newbie) {
- fprintf(stderr, "malloc failed in recruit_servant.\n");
- exit(1);
+ if (newbie) {
+ memset(newbie, 0, sizeof(*newbie));
+ newbie->devname = strdup(devname);
+ newbie->pid = pid;
+ newbie->first_start = 1;
+ }
+ if (!newbie || !newbie->devname) {
+ fprintf(stderr, "heap allocation failed in recruit_servant.\n");
+ exit(1);
+ }
+
+ /* some sanity-check on our newbie */
+ if (sbd_is_disk(newbie)) {
+ cl_log(LOG_INFO, "Monitoring %s", devname);
+ disk_count++;
+ } else if (sbd_is_pcmk(newbie) || sbd_is_cluster(newbie)) {
+ /* alive just after pcmk and cluster servants have shown up */
+ newbie->outdated = 1;
+ } else {
+ /* toss our newbie */
+ cl_log(LOG_ERR, "Refusing to recruit unrecognized servant %s", devname);
+ free((void *) newbie->devname);
+ free(newbie);
+ return;
}
- memset(newbie, 0, sizeof(*newbie));
- newbie->devname = strdup(devname);
- newbie->pid = pid;
- newbie->first_start = 1;
if (!s) {
servants_leader = newbie;
@@ -65,12 +82,6 @@ void recruit_servant(const char *devname, pid_t pid)
}
servant_count++;
- if(sbd_is_disk(newbie)) {
- cl_log(LOG_INFO, "Monitoring %s", devname);
- disk_count++;
- } else {
- newbie->outdated = 1;
- }
}
int assign_servant(const char* devname, functionp_t functionp, int mode, const void* argp)
@@ -148,7 +159,7 @@ void servant_start(struct servants_list_item *s)
if (sbd_is_disk(s)) {
#if SUPPORT_SHARED_DISK
DBGLOG(LOG_INFO, "Starting servant for device %s", s->devname);
- s->pid = assign_servant(s->devname, servant, start_mode, s);
+ s->pid = assign_servant(s->devname, servant_md, start_mode, s);
#else
cl_log(LOG_ERR, "Shared disk functionality not supported");
return;
@@ -785,12 +796,14 @@ parse_device_line(const char *line)
if (lpc > last) {
entry = calloc(1, 1 + lpc - last);
+ if (!entry) {
+ fprintf(stderr, "heap allocation failed parsing device-line.\n");
+ exit(1);
+ }
rc = sscanf(line + last, "%[^;]", entry);
}
- if (entry == NULL) {
- /* Skip */
- } else if (rc != 1) {
+ if (rc != 1) {
cl_log(LOG_WARNING, "Could not parse (%d %d): %s", last, lpc, line + last);
} else {
cl_log(LOG_DEBUG, "Adding '%s'", entry);
diff --git a/src/sbd-md.c b/src/sbd-md.c
index 579d273..ba2c34d 100644
--- a/src/sbd-md.c
+++ b/src/sbd-md.c
@@ -1031,7 +1031,7 @@ static int servant_check_timeout_inconsistent(struct sector_header_s *hdr)
return 0;
}
-int servant(const char *diskname, int mode, const void* argp)
+int servant_md(const char *diskname, int mode, const void* argp)
{
struct sector_mbox_s *s_mbox = NULL;
struct sector_node_s *s_node = NULL;
@@ -1046,11 +1046,6 @@ int servant(const char *diskname, int mode, const void* argp)
char uuid[37];
const struct servants_list_item *s = argp;
- if (!diskname) {
- cl_log(LOG_ERR, "Empty disk name %s.", diskname);
- return -1;
- }
-
cl_log(LOG_INFO, "Servant starting for device %s", diskname);
/* Block most of the signals */
diff --git a/src/sbd.h b/src/sbd.h
index 386c85c..6fe07f9 100644
--- a/src/sbd.h
+++ b/src/sbd.h
@@ -175,7 +175,7 @@ int ping_via_slots(const char *name, struct servants_list_item *servants);
int dump_headers(struct servants_list_item *servants);
unsigned long get_first_msgwait(struct servants_list_item *servants);
int messenger(const char *name, const char *msg, struct servants_list_item *servants);
-int servant(const char *diskname, int mode, const void* argp);
+int servant_md(const char *diskname, int mode, const void* argp);
#endif
int servant_pcmk(const char *diskname, int mode, const void* argp);
--
1.8.3.1