Convert the snprint methods for all keywords to call-by-value,
and use "const" qualifier for the "data" argument. This makes sure
that "snprint" type functions don't modify the data they're print,
helps compile-time correctness checking, and allows more proper
"const" cleanups in the future.
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
Reviewed-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx>
---
libmultipath/dict.c | 206 ++++++++++++++++++++++++--------------------------
libmultipath/parser.c | 9 ++-
libmultipath/parser.h | 12 ++-
3 files changed, 112 insertions(+), 115 deletions(-)
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index e52f1f798f7a..47dc2a38f1ac 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -92,46 +92,35 @@ set_yes_no_undef(vector strvec, void *ptr)
}
static int
-print_int (char *buff, int len, void *ptr)
+print_int (char *buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
- return snprintf(buff, len, "%i", *int_ptr);
+ return snprintf(buff, len, "%li", v);
}
static int
-print_nonzero (char *buff, int len, void *ptr)
+print_nonzero (char *buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
- if (!*int_ptr)
- return 0;
- return snprintf(buff, len, "%i", *int_ptr);
+ return snprintf(buff, len, "%li", v);
}
static int
-print_str (char *buff, int len, void *ptr)
+print_str (char *buff, int len, const char *ptr)
{
- char **str_ptr = (char **)ptr;
- if (!*str_ptr)
- return 0;
- return snprintf(buff, len, "\"%s\"", *str_ptr);
+ return snprintf(buff, len, "\"%s\"", ptr);
}
static int
-print_yes_no (char *buff, int len, void *ptr)
+print_yes_no (char *buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
return snprintf(buff, len, "\"%s\"",
- (*int_ptr == YN_NO)? "no" : "yes");
+ (v == YN_NO)? "no" : "yes");
}
static int
-print_yes_no_undef (char *buff, int len, void *ptr)
+print_yes_no_undef (char *buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
- if (!*int_ptr)
- return 0;
return snprintf(buff, len, "\"%s\"",
- (*int_ptr == YNU_NO)? "no" : "yes");
+ (v == YNU_NO)? "no" : "yes");
}
#define declare_def_handler(option, function) \
@@ -143,29 +132,32 @@ def_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_def_snprint(option, function) \
static int \
-snprint_def_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_def_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- return function (buff, len, &conf->option); \
+ return function (buff, len, conf->option); \
}
#define declare_def_snprint_defint(option, function, value) \
static int \
-snprint_def_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_def_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
int i = value; \
if (!conf->option) \
- return function (buff, len, &i); \
- return function (buff, len, &conf->option); \
+ return function (buff, len, i); \
+ return function (buff, len, conf->option); \
}
#define declare_def_snprint_defstr(option, function, value) \
static int \
-snprint_def_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_def_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- char *s = value; \
+ static const char *s = value; \
if (!conf->option) \
- return function (buff, len, &s); \
- return function (buff, len, &conf->option); \
+ return function (buff, len, s); \
+ return function (buff, len, conf->option); \
}
#define declare_hw_handler(option, function) \
@@ -180,10 +172,11 @@ hw_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_hw_snprint(option, function) \
static int \
-snprint_hw_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_hw_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- struct hwentry * hwe = (struct hwentry *)data; \
- return function (buff, len, &hwe->option); \
+ const struct hwentry * hwe = (const struct hwentry *)data; \
+ return function (buff, len, hwe->option); \
}
#define declare_ovr_handler(option, function) \
@@ -197,9 +190,10 @@ ovr_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_ovr_snprint(option, function) \
static int \
-snprint_ovr_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_ovr_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- return function (buff, len, &conf->overrides->option); \
+ return function (buff, len, conf->overrides->option); \
}
#define declare_mp_handler(option, function) \
@@ -214,10 +208,11 @@ mp_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_mp_snprint(option, function) \
static int \
-snprint_mp_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_mp_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- struct mpentry * mpe = (struct mpentry *)data; \
- return function (buff, len, &mpe->option); \
+ const struct mpentry * mpe = (const struct mpentry *)data; \
+ return function (buff, len, mpe->option); \
}
declare_def_handler(checkint, set_int)
@@ -328,7 +323,7 @@ declare_mp_snprint(minio_rq, print_nonzero)
declare_def_handler(queue_without_daemon, set_yes_no)
static int
snprint_def_queue_without_daemon (struct config *conf,
- char * buff, int len, void * data)
+ char * buff, int len, const void * data)
{
switch (conf->queue_without_daemon) {
case QUE_NO_DAEMON_OFF:
@@ -459,10 +454,11 @@ def_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_def_attr_snprint(option, function) \
static int \
-snprint_def_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_def_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- return function (buff, len, &conf->option, \
- &conf->attribute_flags); \
+ return function (buff, len, conf->option, \
+ conf->attribute_flags); \
}
#define declare_mp_attr_handler(option, function) \
@@ -477,11 +473,12 @@ mp_ ## option ## _handler (struct config *conf, vector strvec) \
#define declare_mp_attr_snprint(option, function) \
static int \
-snprint_mp_ ## option (struct config *conf, char * buff, int len, void * data) \
+snprint_mp_ ## option (struct config *conf, char * buff, int len, \
+ const void * data) \
{ \
- struct mpentry * mpe = (struct mpentry *)data; \
- return function (buff, len, &mpe->option, \
- &mpe->attribute_flags); \
+ const struct mpentry * mpe = (const struct mpentry *)data; \
+ return function (buff, len, mpe->option, \
+ mpe->attribute_flags); \
}
static int
@@ -556,30 +553,30 @@ set_gid(vector strvec, void *ptr, int *flags)
}
static int
-print_mode(char * buff, int len, void *ptr, int *flags)
+print_mode(char * buff, int len, long v, int flags)
{
- mode_t *mode_ptr = (mode_t *)ptr;
- if ((*flags & (1 << ATTR_MODE)) == 0)
+ mode_t mode = (mode_t)v;
+ if ((flags & (1 << ATTR_MODE)) == 0)
return 0;
- return snprintf(buff, len, "0%o", *mode_ptr);
+ return snprintf(buff, len, "0%o", mode);
}
static int
-print_uid(char * buff, int len, void *ptr, int *flags)
+print_uid(char * buff, int len, long v, int flags)
{
- uid_t *uid_ptr = (uid_t *)ptr;
- if ((*flags & (1 << ATTR_UID)) == 0)
+ uid_t uid = (uid_t)v;
+ if ((flags & (1 << ATTR_UID)) == 0)
return 0;
- return snprintf(buff, len, "0%o", *uid_ptr);
+ return snprintf(buff, len, "0%o", uid);
}
static int
-print_gid(char * buff, int len, void *ptr, int *flags)
+print_gid(char * buff, int len, long v, int flags)
{
- gid_t *gid_ptr = (gid_t *)ptr;
- if ((*flags & (1 << ATTR_GID)) == 0)
+ gid_t gid = (gid_t)v;
+ if ((flags & (1 << ATTR_GID)) == 0)
return 0;
- return snprintf(buff, len, "0%o", *gid_ptr);
+ return snprintf(buff, len, "0%o", gid);
}
declare_def_attr_handler(mode, set_mode)
@@ -620,17 +617,15 @@ set_fast_io_fail(vector strvec, void *ptr)
}
int
-print_fast_io_fail(char * buff, int len, void *ptr)
+print_fast_io_fail(char * buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
-
- if (*int_ptr == MP_FAST_IO_FAIL_UNSET)
+ if (v == MP_FAST_IO_FAIL_UNSET)
return 0;
- if (*int_ptr == MP_FAST_IO_FAIL_OFF)
+ if (v == MP_FAST_IO_FAIL_OFF)
return snprintf(buff, len, "\"off\"");
- if (*int_ptr == MP_FAST_IO_FAIL_ZERO)
+ if (v == MP_FAST_IO_FAIL_ZERO)
return snprintf(buff, len, "0");
- return snprintf(buff, len, "%d", *int_ptr);
+ return snprintf(buff, len, "%ld", v);
}
declare_def_handler(fast_io_fail, set_fast_io_fail)
@@ -660,15 +655,11 @@ set_dev_loss(vector strvec, void *ptr)
}
int
-print_dev_loss(char * buff, int len, void *ptr)
+print_dev_loss(char * buff, int len, unsigned long v)
{
- unsigned int *uint_ptr = (unsigned int *)ptr;
-
- if (!*uint_ptr)
- return 0;
- if (*uint_ptr >= MAX_DEV_LOSS_TMO)
+ if (v >= MAX_DEV_LOSS_TMO)
return snprintf(buff, len, "\"infinity\"");
- return snprintf(buff, len, "%u", *uint_ptr);
+ return snprintf(buff, len, "%lu", v);
}
declare_def_handler(dev_loss, set_dev_loss)
@@ -695,10 +686,9 @@ set_pgpolicy(vector strvec, void *ptr)
}
int
-print_pgpolicy(char * buff, int len, void *ptr)
+print_pgpolicy(char * buff, int len, long pgpolicy)
{
char str[POLICY_NAME_SIZE];
- int pgpolicy = *(int *)ptr;
if (!pgpolicy)
return 0;
@@ -776,7 +766,7 @@ max_fds_handler(struct config *conf, vector strvec)
}
static int
-snprint_max_fds (struct config *conf, char * buff, int len, void * data)
+snprint_max_fds (struct config *conf, char * buff, int len, const void * data)
{
int r = 0, max_fds;
@@ -813,15 +803,13 @@ set_rr_weight(vector strvec, void *ptr)
}
int
-print_rr_weight (char * buff, int len, void *ptr)
+print_rr_weight (char * buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
-
- if (!*int_ptr)
+ if (!v)
return 0;
- if (*int_ptr == RR_WEIGHT_PRIO)
+ if (v == RR_WEIGHT_PRIO)
return snprintf(buff, len, "\"priorities\"");
- if (*int_ptr == RR_WEIGHT_NONE)
+ if (v == RR_WEIGHT_NONE)
return snprintf(buff, len, "\"uniform\"");
return 0;
@@ -861,11 +849,9 @@ set_pgfailback(vector strvec, void *ptr)
}
int
-print_pgfailback (char * buff, int len, void *ptr)
+print_pgfailback (char * buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
-
- switch(*int_ptr) {
+ switch(v) {
case FAILBACK_UNDEF:
return 0;
case -FAILBACK_MANUAL:
@@ -875,7 +861,7 @@ print_pgfailback (char * buff, int len, void *ptr)
case -FAILBACK_FOLLOWOVER:
return snprintf(buff, len, "\"followover\"");
default:
- return snprintf(buff, len, "%i", *int_ptr);
+ return snprintf(buff, len, "%li", v);
}
}
@@ -910,11 +896,9 @@ set_no_path_retry(vector strvec, void *ptr)
}
int
-print_no_path_retry(char * buff, int len, void *ptr)
+print_no_path_retry(char * buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
-
- switch(*int_ptr) {
+ switch(v) {
case NO_PATH_RETRY_UNDEF:
return 0;
case NO_PATH_RETRY_FAIL:
@@ -922,7 +906,7 @@ print_no_path_retry(char * buff, int len, void *ptr)
case NO_PATH_RETRY_QUEUE:
return snprintf(buff, len, "\"queue\"");
default:
- return snprintf(buff, len, "%i", *int_ptr);
+ return snprintf(buff, len, "%li", v);
}
}
@@ -955,7 +939,8 @@ def_log_checker_err_handler(struct config *conf, vector strvec)
}
static int
-snprint_def_log_checker_err (struct config *conf, char * buff, int len, void * data)
+snprint_def_log_checker_err (struct config *conf, char * buff, int len,
+ const void * data)
{
if (conf->log_checker_err == LOG_CHKR_ERR_ONCE)
return snprintf(buff, len, "once");
@@ -1008,7 +993,7 @@ def_reservation_key_handler(struct config *conf, vector strvec)
static int
snprint_def_reservation_key (struct config *conf, char * buff, int len,
- void * data)
+ const void * data)
{
return print_reservation_key(buff, len, conf->reservation_key,
conf->prkey_source);
@@ -1026,9 +1011,9 @@ mp_reservation_key_handler(struct config *conf, vector strvec)
static int
snprint_mp_reservation_key (struct config *conf, char * buff, int len,
- void * data)
+ const void * data)
{
- struct mpentry * mpe = (struct mpentry *)data;
+ const struct mpentry * mpe = (const struct mpentry *)data;
return print_reservation_key(buff, len, mpe->reservation_key,
mpe->prkey_source);
}
@@ -1053,17 +1038,15 @@ set_off_int_undef(vector strvec, void *ptr)
}
int
-print_off_int_undef(char * buff, int len, void *ptr)
+print_off_int_undef(char * buff, int len, long v)
{
- int *int_ptr = (int *)ptr;
-
- switch(*int_ptr) {
+ switch(v) {
case NU_UNDEF:
return 0;
case NU_NO:
return snprintf(buff, len, "\"no\"");
default:
- return snprintf(buff, len, "%i", *int_ptr);
+ return snprintf(buff, len, "%li", v);
}
}
@@ -1231,15 +1214,17 @@ declare_ble_handler(blist_property)
declare_ble_handler(elist_property)
static int
-snprint_def_uxsock_timeout(struct config *conf, char * buff, int len, void * data)
+snprint_def_uxsock_timeout(struct config *conf, char * buff, int len,
+ const void * data)
{
return snprintf(buff, len, "%u", conf->uxsock_timeout);
}
static int
-snprint_ble_simple (struct config *conf, char * buff, int len, void * data)
+snprint_ble_simple (struct config *conf, char * buff, int len,
+ const void * data)
{
- struct blentry * ble = (struct blentry *)data;
+ const struct blentry * ble = (const struct blentry *)data;
return snprintf(buff, len, "\"%s\"", ble->str);
}
@@ -1262,17 +1247,21 @@ declare_ble_device_handler(product, blist_device, NULL, buff)
declare_ble_device_handler(product, elist_device, NULL, buff)
static int
-snprint_bled_vendor (struct config *conf, char * buff, int len, void * data)
+snprint_bled_vendor (struct config *conf, char * buff, int len,
+ const void * data)
{
- struct blentry_device * bled = (struct blentry_device *)data;
+ const struct blentry_device * bled =
+ (const struct blentry_device *)data;
return snprintf(buff, len, "\"%s\"", bled->vendor);
}
static int
-snprint_bled_product (struct config *conf, char * buff, int len, void * data)
+snprint_bled_product (struct config *conf, char * buff, int len,
+ const void * data)
{
- struct blentry_device * bled = (struct blentry_device *)data;
+ const struct blentry_device * bled =
+ (const struct blentry_device *)data;
return snprintf(buff, len, "\"%s\"", bled->product);
}
@@ -1402,7 +1391,8 @@ deprecated_handler(struct config *conf, vector strvec)
}
static int
-snprint_deprecated (struct config *conf, char * buff, int len, void * data)
+snprint_deprecated (struct config *conf, char * buff, int len,
+ const void * data)
{
return 0;
}
diff --git a/libmultipath/parser.c b/libmultipath/parser.c
index c47d891ec369..5caa2019a1a4 100644
--- a/libmultipath/parser.c
+++ b/libmultipath/parser.c
@@ -33,7 +33,8 @@ static int line_nr;
int
keyword_alloc(vector keywords, char *string,
int (*handler) (struct config *, vector),
- int (*print) (struct config *, char *, int, void *), int unique)
+ int (*print) (struct config *, char *, int, const void*),
+ int unique)
{
struct keyword *keyword;
@@ -71,7 +72,8 @@ install_sublevel_end(void)
int
_install_keyword(vector keywords, char *string,
int (*handler) (struct config *, vector),
- int (*print) (struct config *, char *, int, void *), int unique)
+ int (*print) (struct config *, char *, int, const void*),
+ int unique)
{
int i = 0;
struct keyword *keyword;
@@ -143,7 +145,8 @@ find_keyword(vector keywords, vector v, char * name)
}
int
-snprint_keyword(char *buff, int len, char *fmt, struct keyword *kw, void *data)
+snprint_keyword(char *buff, int len, char *fmt, struct keyword *kw,
+ const void *data)
{
int r;
int fwd = 0;
diff --git a/libmultipath/parser.h b/libmultipath/parser.h
index 519b805d4149..0a747507d7be 100644
--- a/libmultipath/parser.h
+++ b/libmultipath/parser.h
@@ -43,7 +43,7 @@
struct keyword {
char *string;
int (*handler) (struct config *, vector);
- int (*print) (struct config *, char *, int, void *);
+ int (*print) (struct config *, char *, int, const void *);
vector sub;
int unique;
};
@@ -60,13 +60,17 @@ struct keyword {
/* Prototypes */
extern int keyword_alloc(vector keywords, char *string,
int (*handler) (struct config *, vector),
- int (*print) (struct config *, char *, int, void *), int unique);
+ int (*print) (struct config *, char *, int,
+ const void *),
+ int unique);
#define install_keyword_root(str, h) keyword_alloc(keywords, str, h, NULL, 1)
extern void install_sublevel(void);
extern void install_sublevel_end(void);
extern int _install_keyword(vector keywords, char *string,
int (*handler) (struct config *, vector),
- int (*print) (struct config *, char *, int, void *), int unique);
+ int (*print) (struct config *, char *, int,
+ const void *),
+ int unique);
#define install_keyword(str, vec, pri) _install_keyword(keywords, str, vec, pri, 1)
#define install_keyword_multi(str, vec, pri) _install_keyword(keywords, str, vec, pri, 0)
extern void dump_keywords(vector keydump, int level);
@@ -76,6 +80,6 @@ extern void *set_value(vector strvec);
extern int process_file(struct config *conf, char *conf_file);
extern struct keyword * find_keyword(vector keywords, vector v, char * name);
int snprint_keyword(char *buff, int len, char *fmt, struct keyword *kw,
- void *data);
+ const void *data);
#endif
--
2.16.1
--
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