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nvlist: Add nvlist_snprintf() and zfs_dbgmsg_nvlist()

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Add nvlist_snprintf() to print a nvlist to a buffer.  This is basically
the snprintf() version of dump_nvlist().  Along with that, add a
zfs_dbgmsg_nvlist() to print out an nvlist to dbgmsg.  This will aid in
debugging.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #17215
This commit is contained in:
Tony Hutter
2025-04-18 06:22:16 -07:00
committed by GitHub
parent ba03054c83
commit 8d1489735b
12 changed files with 488 additions and 332 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/libnvpair/libnvpair.c
+27 -154
View File
@@ -783,160 +783,6 @@ nvlist_prt(nvlist_t *nvl, nvlist_prtctl_t pctl)
nvlist_print_with_indent(nvl, pctl);
}
#define NVP(elem, type, vtype, ptype, format) { \
vtype value; \
\
(void) nvpair_value_##type(elem, &value); \
(void) printf("%*s%s: " format "\n", indent, "", \
nvpair_name(elem), (ptype)value); \
}
#define NVPA(elem, type, vtype, ptype, format) { \
uint_t i, count; \
vtype *value; \
\
(void) nvpair_value_##type(elem, &value, &count); \
for (i = 0; i < count; i++) { \
(void) printf("%*s%s[%d]: " format "\n", indent, "", \
nvpair_name(elem), i, (ptype)value[i]); \
} \
}
/*
* Similar to nvlist_print() but handles arrays slightly differently.
*/
void
dump_nvlist(nvlist_t *list, int indent)
{
nvpair_t *elem = NULL;
boolean_t bool_value;
nvlist_t *nvlist_value;
nvlist_t **nvlist_array_value;
uint_t i, count;
if (list == NULL) {
return;
}
while ((elem = nvlist_next_nvpair(list, elem)) != NULL) {
switch (nvpair_type(elem)) {
case DATA_TYPE_BOOLEAN:
(void) printf("%*s%s\n", indent, "", nvpair_name(elem));
break;
case DATA_TYPE_BOOLEAN_VALUE:
(void) nvpair_value_boolean_value(elem, &bool_value);
(void) printf("%*s%s: %s\n", indent, "",
nvpair_name(elem), bool_value ? "true" : "false");
break;
case DATA_TYPE_BYTE:
NVP(elem, byte, uchar_t, int, "%u");
break;
case DATA_TYPE_INT8:
NVP(elem, int8, int8_t, int, "%d");
break;
case DATA_TYPE_UINT8:
NVP(elem, uint8, uint8_t, int, "%u");
break;
case DATA_TYPE_INT16:
NVP(elem, int16, int16_t, int, "%d");
break;
case DATA_TYPE_UINT16:
NVP(elem, uint16, uint16_t, int, "%u");
break;
case DATA_TYPE_INT32:
NVP(elem, int32, int32_t, long, "%ld");
break;
case DATA_TYPE_UINT32:
NVP(elem, uint32, uint32_t, ulong_t, "%lu");
break;
case DATA_TYPE_INT64:
NVP(elem, int64, int64_t, longlong_t, "%lld");
break;
case DATA_TYPE_UINT64:
NVP(elem, uint64, uint64_t, u_longlong_t, "%llu");
break;
case DATA_TYPE_STRING:
NVP(elem, string, const char *, const char *, "'%s'");
break;
case DATA_TYPE_BYTE_ARRAY:
NVPA(elem, byte_array, uchar_t, int, "%u");
break;
case DATA_TYPE_INT8_ARRAY:
NVPA(elem, int8_array, int8_t, int, "%d");
break;
case DATA_TYPE_UINT8_ARRAY:
NVPA(elem, uint8_array, uint8_t, int, "%u");
break;
case DATA_TYPE_INT16_ARRAY:
NVPA(elem, int16_array, int16_t, int, "%d");
break;
case DATA_TYPE_UINT16_ARRAY:
NVPA(elem, uint16_array, uint16_t, int, "%u");
break;
case DATA_TYPE_INT32_ARRAY:
NVPA(elem, int32_array, int32_t, long, "%ld");
break;
case DATA_TYPE_UINT32_ARRAY:
NVPA(elem, uint32_array, uint32_t, ulong_t, "%lu");
break;
case DATA_TYPE_INT64_ARRAY:
NVPA(elem, int64_array, int64_t, longlong_t, "%lld");
break;
case DATA_TYPE_UINT64_ARRAY:
NVPA(elem, uint64_array, uint64_t, u_longlong_t,
"%llu");
break;
case DATA_TYPE_STRING_ARRAY:
NVPA(elem, string_array, const char *, const char *,
"'%s'");
break;
case DATA_TYPE_NVLIST:
(void) nvpair_value_nvlist(elem, &nvlist_value);
(void) printf("%*s%s:\n", indent, "",
nvpair_name(elem));
dump_nvlist(nvlist_value, indent + 4);
break;
case DATA_TYPE_NVLIST_ARRAY:
(void) nvpair_value_nvlist_array(elem,
&nvlist_array_value, &count);
for (i = 0; i < count; i++) {
(void) printf("%*s%s[%u]:\n", indent, "",
nvpair_name(elem), i);
dump_nvlist(nvlist_array_value[i], indent + 4);
}
break;
default:
(void) printf(dgettext(TEXT_DOMAIN, "bad config type "
"%d for %s\n"), nvpair_type(elem),
nvpair_name(elem));
}
}
}
/*
* ======================================================================
* | |
@@ -1291,3 +1137,30 @@ nvpair_value_match(nvpair_t *nvp, int ai, const char *value, const char **ep)
{
return (nvpair_value_match_regex(nvp, ai, value, NULL, ep));
}
/*
* Similar to nvlist_print() but handles arrays slightly differently.
*/
void
dump_nvlist(nvlist_t *list, int indent)
{
int len;
char *buf;
len = nvlist_snprintf(NULL, 0, list, indent);
len++; /* Add null terminator */
buf = malloc(len);
if (buf == NULL)
return;
(void) nvlist_snprintf(buf, len, list, indent);
/*
* fputs does not have limitations on the size of the buffer being
* printed (unlike printf).
*/
fputs(buf, stdout);
free(buf);
}