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device-mapper-multipath/SOURCES/0027-libmultipath-make-set_...

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Tue, 28 Sep 2021 15:59:19 -0500
Subject: [PATCH] libmultipath: make set_int take a range for valid values
If a value outside of the valid range is passed to set_int, it caps the
value at appropriate limit, and issues a warning.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
libmultipath/dict.c | 121 +++++++++++++++++++++++++++-----------------
1 file changed, 75 insertions(+), 46 deletions(-)
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index eb2c44c0..57b6a7b6 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -29,7 +29,8 @@
#include "strbuf.h"
static int
-set_int(vector strvec, void *ptr, const char *file, int line_nr)
+set_int(vector strvec, void *ptr, int min, int max, const char *file,
+ int line_nr)
{
int *int_ptr = (int *)ptr;
char *buff, *eptr;
@@ -44,11 +45,17 @@ set_int(vector strvec, void *ptr, const char *file, int line_nr)
if (eptr > buff)
while (isspace(*eptr))
eptr++;
- if (*buff == '\0' || *eptr != '\0' || res > INT_MAX || res < INT_MIN) {
- condlog(1, "%s: invalid value for %s: \"%s\"",
- __func__, (char*)VECTOR_SLOT(strvec, 0), buff);
+ if (*buff == '\0' || *eptr != '\0') {
+ condlog(1, "%s line %d, invalid value for %s: \"%s\"",
+ file, line_nr, (char*)VECTOR_SLOT(strvec, 0), buff);
rc = 1;
} else {
+ if (res > max || res < min) {
+ res = (res > max) ? max : min;
+ condlog(1, "%s line %d, value for %s too %s, capping at %ld",
+ file, line_nr, (char*)VECTOR_SLOT(strvec, 0),
+ (res == max)? "large" : "small", res);
+ }
rc = 0;
*int_ptr = res;
}
@@ -77,8 +84,8 @@ set_uint(vector strvec, void *ptr, const char *file, int line_nr)
while (isspace(*eptr))
eptr++;
if (*buff == '\0' || *eptr != '\0' || !isdigit(*p) || res > UINT_MAX) {
- condlog(1, "%s: invalid value for %s: \"%s\"",
- __func__, (char*)VECTOR_SLOT(strvec, 0), buff);
+ condlog(1, "%s line %d, invalid value for %s: \"%s\"",
+ file, line_nr, (char*)VECTOR_SLOT(strvec, 0), buff);
rc = 1;
} else {
rc = 0;
@@ -193,6 +200,14 @@ def_ ## option ## _handler (struct config *conf, vector strvec, \
return function (strvec, &conf->option, file, line_nr); \
}
+#define declare_def_range_handler(option, minval, maxval) \
+static int \
+def_ ## option ## _handler (struct config *conf, vector strvec, \
+ const char *file, int line_nr) \
+{ \
+ return set_int(strvec, &conf->option, minval, maxval, file, line_nr); \
+}
+
#define declare_def_snprint(option, function) \
static int \
snprint_def_ ## option (struct config *conf, struct strbuf *buff, \
@@ -234,6 +249,18 @@ hw_ ## option ## _handler (struct config *conf, vector strvec, \
return function (strvec, &hwe->option, file, line_nr); \
}
+#define declare_hw_range_handler(option, minval, maxval) \
+static int \
+hw_ ## option ## _handler (struct config *conf, vector strvec, \
+ const char *file, int line_nr) \
+{ \
+ struct hwentry * hwe = VECTOR_LAST_SLOT(conf->hwtable); \
+ if (!hwe) \
+ return 1; \
+ return set_int(strvec, &hwe->option, minval, maxval, file, line_nr); \
+}
+
+
#define declare_hw_snprint(option, function) \
static int \
snprint_hw_ ## option (struct config *conf, struct strbuf *buff, \
@@ -253,6 +280,17 @@ ovr_ ## option ## _handler (struct config *conf, vector strvec, \
return function (strvec, &conf->overrides->option, file, line_nr); \
}
+#define declare_ovr_range_handler(option, minval, maxval) \
+static int \
+ovr_ ## option ## _handler (struct config *conf, vector strvec, \
+ const char *file, int line_nr) \
+{ \
+ if (!conf->overrides) \
+ return 1; \
+ return set_int(strvec, &conf->overrides->option, minval, maxval, \
+ file, line_nr); \
+}
+
#define declare_ovr_snprint(option, function) \
static int \
snprint_ovr_ ## option (struct config *conf, struct strbuf *buff, \
@@ -272,6 +310,17 @@ mp_ ## option ## _handler (struct config *conf, vector strvec, \
return function (strvec, &mpe->option, file, line_nr); \
}
+#define declare_mp_range_handler(option, minval, maxval) \
+static int \
+mp_ ## option ## _handler (struct config *conf, vector strvec, \
+ const char *file, int line_nr) \
+{ \
+ struct mpentry * mpe = VECTOR_LAST_SLOT(conf->mptable); \
+ if (!mpe) \
+ return 1; \
+ return set_int(strvec, &mpe->option, minval, maxval, file, line_nr); \
+}
+
#define declare_mp_snprint(option, function) \
static int \
snprint_mp_ ## option (struct config *conf, struct strbuf *buff, \
@@ -298,7 +347,7 @@ declare_def_snprint(checkint, print_int)
declare_def_handler(max_checkint, set_uint)
declare_def_snprint(max_checkint, print_int)
-declare_def_handler(verbosity, set_int)
+declare_def_range_handler(verbosity, 0, MAX_VERBOSITY)
declare_def_snprint(verbosity, print_int)
declare_def_handler(reassign_maps, set_yes_no)
@@ -473,22 +522,22 @@ declare_ovr_snprint(checker_name, print_str)
declare_hw_handler(checker_name, set_str)
declare_hw_snprint(checker_name, print_str)
-declare_def_handler(minio, set_int)
+declare_def_range_handler(minio, 0, INT_MAX)
declare_def_snprint_defint(minio, print_int, DEFAULT_MINIO)
-declare_ovr_handler(minio, set_int)
+declare_ovr_range_handler(minio, 0, INT_MAX)
declare_ovr_snprint(minio, print_nonzero)
-declare_hw_handler(minio, set_int)
+declare_hw_range_handler(minio, 0, INT_MAX)
declare_hw_snprint(minio, print_nonzero)
-declare_mp_handler(minio, set_int)
+declare_mp_range_handler(minio, 0, INT_MAX)
declare_mp_snprint(minio, print_nonzero)
-declare_def_handler(minio_rq, set_int)
+declare_def_range_handler(minio_rq, 0, INT_MAX)
declare_def_snprint_defint(minio_rq, print_int, DEFAULT_MINIO_RQ)
-declare_ovr_handler(minio_rq, set_int)
+declare_ovr_range_handler(minio_rq, 0, INT_MAX)
declare_ovr_snprint(minio_rq, print_nonzero)
-declare_hw_handler(minio_rq, set_int)
+declare_hw_range_handler(minio_rq, 0, INT_MAX)
declare_hw_snprint(minio_rq, print_nonzero)
-declare_mp_handler(minio_rq, set_int)
+declare_mp_range_handler(minio_rq, 0, INT_MAX)
declare_mp_snprint(minio_rq, print_nonzero)
declare_def_handler(queue_without_daemon, set_yes_no)
@@ -512,7 +561,7 @@ snprint_def_queue_without_daemon(struct config *conf, struct strbuf *buff,
return append_strbuf_quoted(buff, qwd);
}
-declare_def_handler(checker_timeout, set_int)
+declare_def_range_handler(checker_timeout, 0, INT_MAX)
declare_def_snprint(checker_timeout, print_nonzero)
declare_def_handler(allow_usb_devices, set_yes_no)
@@ -583,13 +632,13 @@ declare_hw_snprint(deferred_remove, print_yes_no_undef)
declare_mp_handler(deferred_remove, set_yes_no_undef)
declare_mp_snprint(deferred_remove, print_yes_no_undef)
-declare_def_handler(retrigger_tries, set_int)
+declare_def_range_handler(retrigger_tries, 0, INT_MAX)
declare_def_snprint(retrigger_tries, print_int)
-declare_def_handler(retrigger_delay, set_int)
+declare_def_range_handler(retrigger_delay, 0, INT_MAX)
declare_def_snprint(retrigger_delay, print_int)
-declare_def_handler(uev_wait_timeout, set_int)
+declare_def_range_handler(uev_wait_timeout, 0, INT_MAX)
declare_def_snprint(uev_wait_timeout, print_int)
declare_def_handler(strict_timing, set_yes_no)
@@ -616,19 +665,19 @@ static int snprint_def_disable_changed_wwids(struct config *conf,
return print_ignored(buff);
}
-declare_def_handler(remove_retries, set_int)
+declare_def_range_handler(remove_retries, 0, INT_MAX)
declare_def_snprint(remove_retries, print_int)
-declare_def_handler(max_sectors_kb, set_int)
+declare_def_range_handler(max_sectors_kb, 0, INT_MAX)
declare_def_snprint(max_sectors_kb, print_nonzero)
-declare_ovr_handler(max_sectors_kb, set_int)
+declare_ovr_range_handler(max_sectors_kb, 0, INT_MAX)
declare_ovr_snprint(max_sectors_kb, print_nonzero)
-declare_hw_handler(max_sectors_kb, set_int)
+declare_hw_range_handler(max_sectors_kb, 0, INT_MAX)
declare_hw_snprint(max_sectors_kb, print_nonzero)
-declare_mp_handler(max_sectors_kb, set_int)
+declare_mp_range_handler(max_sectors_kb, 0, INT_MAX)
declare_mp_snprint(max_sectors_kb, print_nonzero)
-declare_def_handler(find_multipaths_timeout, set_int)
+declare_def_range_handler(find_multipaths_timeout, INT_MIN, INT_MAX)
declare_def_snprint_defint(find_multipaths_timeout, print_int,
DEFAULT_FIND_MULTIPATHS_TIMEOUT)
@@ -1385,27 +1434,7 @@ declare_ovr_snprint(recheck_wwid, print_yes_no_undef)
declare_hw_handler(recheck_wwid, set_yes_no_undef)
declare_hw_snprint(recheck_wwid, print_yes_no_undef)
-
-static int
-def_uxsock_timeout_handler(struct config *conf, vector strvec, const char *file,
- int line_nr)
-{
- unsigned int uxsock_timeout;
- char *buff;
-
- buff = set_value(strvec);
- if (!buff)
- return 1;
-
- if (sscanf(buff, "%u", &uxsock_timeout) == 1 &&
- uxsock_timeout > DEFAULT_REPLY_TIMEOUT)
- conf->uxsock_timeout = uxsock_timeout;
- else
- conf->uxsock_timeout = DEFAULT_REPLY_TIMEOUT;
-
- free(buff);
- return 0;
-}
+declare_def_range_handler(uxsock_timeout, DEFAULT_REPLY_TIMEOUT, INT_MAX)
static int
hw_vpd_vendor_handler(struct config *conf, vector strvec, const char *file,
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