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sys/dev/bhnd/nvram/bhnd_nvram_common.c
- This file was added.
/*- | |||||
* Copyright (c) 2016 Landon Fuller <landonf@FreeBSD.org> | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer, | |||||
* without modification. | |||||
* 2. Redistributions in binary form must reproduce at minimum a disclaimer | |||||
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any | |||||
* redistribution must be conditioned upon including a substantially | |||||
* similar Disclaimer requirement for further binary redistribution. | |||||
* | |||||
* NO WARRANTY | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY | |||||
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |||||
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, | |||||
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |||||
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |||||
* THE POSSIBILITY OF SUCH DAMAGES. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include <sys/ctype.h> | |||||
#include <sys/hash.h> | |||||
#include <sys/param.h> | |||||
#include <sys/limits.h> | |||||
#include <sys/malloc.h> | |||||
#include <sys/kernel.h> | |||||
#include <sys/systm.h> | |||||
#include <machine/_inttypes.h> | |||||
#include "bhnd_nvram_common.h" | |||||
#include "bhnd_nvram_map_data.h" | |||||
/* | |||||
* Common NVRAM/SPROM support, including NVRAM variable map | |||||
* lookup. | |||||
*/ | |||||
MALLOC_DEFINE(M_BHND_NVRAM, "bhnd_nvram", "bhnd nvram data"); | |||||
/* | |||||
* CRC-8 lookup table used to checksum SPROM and NVRAM data via | |||||
* bhnd_nvram_crc8(). | |||||
* | |||||
* Generated with following parameters: | |||||
* polynomial: CRC-8 (x^8 + x^7 + x^6 + x^4 + x^2 + 1) | |||||
* reflected bits: false | |||||
* reversed: true | |||||
*/ | |||||
const uint8_t bhnd_nvram_crc8_tab[] = { | |||||
0x00, 0xf7, 0xb9, 0x4e, 0x25, 0xd2, 0x9c, 0x6b, 0x4a, 0xbd, 0xf3, | |||||
0x04, 0x6f, 0x98, 0xd6, 0x21, 0x94, 0x63, 0x2d, 0xda, 0xb1, 0x46, | |||||
0x08, 0xff, 0xde, 0x29, 0x67, 0x90, 0xfb, 0x0c, 0x42, 0xb5, 0x7f, | |||||
0x88, 0xc6, 0x31, 0x5a, 0xad, 0xe3, 0x14, 0x35, 0xc2, 0x8c, 0x7b, | |||||
0x10, 0xe7, 0xa9, 0x5e, 0xeb, 0x1c, 0x52, 0xa5, 0xce, 0x39, 0x77, | |||||
0x80, 0xa1, 0x56, 0x18, 0xef, 0x84, 0x73, 0x3d, 0xca, 0xfe, 0x09, | |||||
0x47, 0xb0, 0xdb, 0x2c, 0x62, 0x95, 0xb4, 0x43, 0x0d, 0xfa, 0x91, | |||||
0x66, 0x28, 0xdf, 0x6a, 0x9d, 0xd3, 0x24, 0x4f, 0xb8, 0xf6, 0x01, | |||||
0x20, 0xd7, 0x99, 0x6e, 0x05, 0xf2, 0xbc, 0x4b, 0x81, 0x76, 0x38, | |||||
0xcf, 0xa4, 0x53, 0x1d, 0xea, 0xcb, 0x3c, 0x72, 0x85, 0xee, 0x19, | |||||
0x57, 0xa0, 0x15, 0xe2, 0xac, 0x5b, 0x30, 0xc7, 0x89, 0x7e, 0x5f, | |||||
0xa8, 0xe6, 0x11, 0x7a, 0x8d, 0xc3, 0x34, 0xab, 0x5c, 0x12, 0xe5, | |||||
0x8e, 0x79, 0x37, 0xc0, 0xe1, 0x16, 0x58, 0xaf, 0xc4, 0x33, 0x7d, | |||||
0x8a, 0x3f, 0xc8, 0x86, 0x71, 0x1a, 0xed, 0xa3, 0x54, 0x75, 0x82, | |||||
0xcc, 0x3b, 0x50, 0xa7, 0xe9, 0x1e, 0xd4, 0x23, 0x6d, 0x9a, 0xf1, | |||||
0x06, 0x48, 0xbf, 0x9e, 0x69, 0x27, 0xd0, 0xbb, 0x4c, 0x02, 0xf5, | |||||
0x40, 0xb7, 0xf9, 0x0e, 0x65, 0x92, 0xdc, 0x2b, 0x0a, 0xfd, 0xb3, | |||||
0x44, 0x2f, 0xd8, 0x96, 0x61, 0x55, 0xa2, 0xec, 0x1b, 0x70, 0x87, | |||||
0xc9, 0x3e, 0x1f, 0xe8, 0xa6, 0x51, 0x3a, 0xcd, 0x83, 0x74, 0xc1, | |||||
0x36, 0x78, 0x8f, 0xe4, 0x13, 0x5d, 0xaa, 0x8b, 0x7c, 0x32, 0xc5, | |||||
0xae, 0x59, 0x17, 0xe0, 0x2a, 0xdd, 0x93, 0x64, 0x0f, 0xf8, 0xb6, | |||||
0x41, 0x60, 0x97, 0xd9, 0x2e, 0x45, 0xb2, 0xfc, 0x0b, 0xbe, 0x49, | |||||
0x07, 0xf0, 0x9b, 0x6c, 0x22, 0xd5, 0xf4, 0x03, 0x4d, 0xba, 0xd1, | |||||
0x26, 0x68, 0x9f | |||||
}; | |||||
/** | |||||
* Return the size of type @p type, or 0 if @p type has a variable width | |||||
* (e.g. a C string). | |||||
* | |||||
* @param type NVRAM data type. | |||||
* @result the byte width of @p type. | |||||
*/ | |||||
size_t | |||||
bhnd_nvram_type_width(bhnd_nvram_type type) | |||||
{ | |||||
switch (type) { | |||||
case BHND_NVRAM_TYPE_INT8: | |||||
case BHND_NVRAM_TYPE_UINT8: | |||||
case BHND_NVRAM_TYPE_CHAR: | |||||
return (sizeof(uint8_t)); | |||||
case BHND_NVRAM_TYPE_INT16: | |||||
case BHND_NVRAM_TYPE_UINT16: | |||||
return (sizeof(uint16_t)); | |||||
case BHND_NVRAM_TYPE_INT32: | |||||
case BHND_NVRAM_TYPE_UINT32: | |||||
return (sizeof(uint32_t)); | |||||
case BHND_NVRAM_TYPE_CSTR: | |||||
return (0); | |||||
} | |||||
/* Quiesce gcc4.2 */ | |||||
panic("bhnd nvram type %u unknown", type); | |||||
} | |||||
/** | |||||
* Return the format string to use when printing @p type with @p sfmt | |||||
* | |||||
* @param type The value type being printed. | |||||
* @param sfmt The string format required for @p type. | |||||
* @param elem_num The element index being printed. If this is the first | |||||
* value in an array of elements, the index would be 0, the next would be 1, | |||||
* and so on. | |||||
* | |||||
* @retval non-NULL A valid printf format string. | |||||
* @retval NULL If no format string is available for @p type and @p sfmt. | |||||
*/ | |||||
const char * | |||||
bhnd_nvram_type_fmt(bhnd_nvram_type type, bhnd_nvram_sfmt sfmt, | |||||
size_t elem_num) | |||||
{ | |||||
size_t width; | |||||
width = bhnd_nvram_type_width(type); | |||||
/* Sanity-check the type width */ | |||||
switch (width) { | |||||
case 1: | |||||
case 2: | |||||
case 4: | |||||
break; | |||||
default: | |||||
return (NULL); | |||||
} | |||||
/* Special-cased string formats */ | |||||
switch (sfmt) { | |||||
case BHND_NVRAM_SFMT_LEDDC: | |||||
/* If this is the first element, use the 0x-prefixed | |||||
* SFMT_HEX */ | |||||
if (elem_num == 0) | |||||
sfmt = BHND_NVRAM_SFMT_HEX; | |||||
break; | |||||
default: | |||||
break; | |||||
} | |||||
/* Return the format string */ | |||||
switch (sfmt) { | |||||
case BHND_NVRAM_SFMT_MACADDR: | |||||
switch (width) { | |||||
case 1: return ("%02" PRIx8); | |||||
} | |||||
break; | |||||
case BHND_NVRAM_SFMT_HEX: | |||||
switch (width) { | |||||
case 1: return ("0x%02" PRIx8); | |||||
case 2: return ("0x%04" PRIx16); | |||||
case 4: return ("0x%08" PRIx32); | |||||
} | |||||
break; | |||||
case BHND_NVRAM_SFMT_DEC: | |||||
if (BHND_NVRAM_SIGNED_TYPE(type)) { | |||||
switch (width) { | |||||
case 1: return ("%" PRId8); | |||||
case 2: return ("%" PRId16); | |||||
case 4: return ("%" PRId32); | |||||
} | |||||
} else { | |||||
switch (width) { | |||||
case 1: return ("%" PRIu8); | |||||
case 2: return ("%" PRIu16); | |||||
case 4: return ("%" PRIu32); | |||||
} | |||||
} | |||||
break; | |||||
case BHND_NVRAM_SFMT_LEDDC: | |||||
switch (width) { | |||||
case 1: return ("%02" PRIx8); | |||||
case 2: return ("%04" PRIx16); | |||||
case 4: return ("%08" PRIx32); | |||||
} | |||||
break; | |||||
case BHND_NVRAM_SFMT_CCODE: | |||||
switch (width) { | |||||
case 1: return ("%c"); | |||||
} | |||||
break; | |||||
} | |||||
return (NULL); | |||||
} | |||||
/** | |||||
* Find and return the variable definition for @p varname, if any. | |||||
* | |||||
* @param varname variable name | |||||
* | |||||
* @retval bhnd_nvram_vardefn If a valid definition for @p varname is found. | |||||
* @retval NULL If no definition for @p varname is found. | |||||
*/ | |||||
const struct bhnd_nvram_vardefn * | |||||
bhnd_nvram_find_vardefn(const char *varname) | |||||
{ | |||||
size_t min, mid, max; | |||||
int order; | |||||
/* | |||||
* Locate the requested variable using a binary search. | |||||
* | |||||
* The variable table is guaranteed to be sorted in lexicographical | |||||
* order (using the 'C' locale for collation rules) | |||||
*/ | |||||
min = 0; | |||||
mid = 0; | |||||
max = nitems(bhnd_nvram_vardefs) - 1; | |||||
while (max >= min) { | |||||
/* Select midpoint */ | |||||
mid = (min + max) / 2; | |||||
/* Determine which side of the partition to search */ | |||||
order = strcmp(bhnd_nvram_vardefs[mid].name, varname); | |||||
if (order < 0) { | |||||
/* Search upper partition */ | |||||
min = mid + 1; | |||||
} else if (order > 0) { | |||||
/* Search lower partition */ | |||||
max = mid - 1; | |||||
} else if (order == 0) { | |||||
/* Match found */ | |||||
return (&bhnd_nvram_vardefs[mid]); | |||||
} | |||||
} | |||||
/* Not found */ | |||||
return (NULL); | |||||
} | |||||
/** | |||||
* Validate an NVRAM variable name. | |||||
* | |||||
* Scans for special characters (path delimiters, value delimiters, path | |||||
* alias prefixes), returning false if the given name cannot be used | |||||
* as a relative NVRAM key. | |||||
* | |||||
* @param name A relative NVRAM variable name to validate. | |||||
* @param name_len The length of @p name, in bytes. | |||||
* | |||||
* @retval true If @p name is a valid relative NVRAM key. | |||||
* @retval false If @p name should not be used as a relative NVRAM key. | |||||
*/ | |||||
bool | |||||
bhnd_nvram_validate_name(const char *name, size_t name_len) | |||||
{ | |||||
size_t limit; | |||||
limit = strnlen(name, name_len); | |||||
if (limit == 0) | |||||
return (false); | |||||
/* Disallow path alias prefixes ([0-9]+:.*) */ | |||||
if (limit >= 2 && isdigit(*name)) { | |||||
for (const char *p = name; p - name < limit; p++) { | |||||
if (isdigit(*p)) | |||||
continue; | |||||
else if (*p == ':') | |||||
return (false); | |||||
else | |||||
break; | |||||
} | |||||
} | |||||
/* Scan for special characters */ | |||||
for (const char *p = name; p - name < limit; p++) { | |||||
switch (*p) { | |||||
case '/': /* path delimiter */ | |||||
case '=': /* key=value delimiter */ | |||||
return (false); | |||||
default: | |||||
if (isspace(*p) || !isascii(*p)) | |||||
return (false); | |||||
} | |||||
} | |||||
return (true); | |||||
} | |||||
/** | |||||
* Parse an octet string, such as a MAC address, consisting of hex octets | |||||
* separated with ':' or '-'. | |||||
* | |||||
* @param value The octet string to parse. | |||||
* @param value_len The length of @p value, in bytes. | |||||
* @param buf The output buffer to which parsed octets will be written. May be | |||||
* NULL. | |||||
* @param[in,out] len The capacity of @p buf. On success, will be set | |||||
* to the actual size of the requested value. | |||||
* @param type | |||||
*/ | |||||
int | |||||
bhnd_nvram_parse_octet_string(const char *value, size_t value_len, void *buf, | |||||
size_t *len, bhnd_nvram_type type) | |||||
{ | |||||
size_t limit, nbytes, width; | |||||
size_t slen; | |||||
uint8_t octet; | |||||
char delim; | |||||
slen = strnlen(value, value_len); | |||||
nbytes = 0; | |||||
if (buf != NULL) | |||||
limit = *len; | |||||
else | |||||
limit = 0; | |||||
/* Type must have a fixed width */ | |||||
if ((width = bhnd_nvram_type_width(type)) == 0) | |||||
return (EINVAL); | |||||
/* String length (not including NUL) must be aligned on an octet | |||||
* boundary ('AA:BB', not 'AA:B', etc), and must be large enough | |||||
* to contain at least two octet entries. */ | |||||
if (slen % 3 != 2 || slen < sizeof("AA:BB") - 1) | |||||
return (EINVAL); | |||||
/* Identify the delimiter used. The standard delimiter for | |||||
* MAC addresses is ':', but some earlier NVRAM formats may use | |||||
* '-' */ | |||||
switch ((delim = value[2])) { | |||||
case ':': | |||||
case '-': | |||||
break; | |||||
default: | |||||
return (EINVAL); | |||||
} | |||||
/* Parse octets */ | |||||
for (const char *p = value; p - value < value_len; p++) { | |||||
void *outp; | |||||
size_t pos; | |||||
unsigned char c; | |||||
pos = (p - value); | |||||
/* Skip delimiter after each octet */ | |||||
if (pos % 3 == 2) { | |||||
if (*p == delim) | |||||
continue; | |||||
if (*p == '\0') | |||||
return (0); | |||||
/* No delimiter? */ | |||||
return (EINVAL); | |||||
} | |||||
c = *(const unsigned char *)p; | |||||
if (isdigit(c)) | |||||
c -= '0'; | |||||
else if (isxdigit(c)) | |||||
c -= islower(c) ? 'a' - 10 : 'A' - 10; | |||||
else | |||||
return (EINVAL); | |||||
if (pos % 3 == 0) { | |||||
/* MSB */ | |||||
octet = (c << 4); | |||||
continue; | |||||
} else if (pos % 3 == 1) { | |||||
/* LSB */ | |||||
octet |= (c & 0xF); | |||||
} | |||||
/* Skip writing? */ | |||||
if (limit < width || limit - width < nbytes) { | |||||
nbytes += width; | |||||
continue; | |||||
} | |||||
/* Write output */ | |||||
outp = ((uint8_t *)buf) + nbytes; | |||||
switch (type) { | |||||
case BHND_NVRAM_TYPE_UINT8: | |||||
*(uint8_t *)outp = octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_UINT16: | |||||
*(uint16_t *)outp = octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_UINT32: | |||||
*(uint32_t *)outp = octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_INT8: | |||||
if (octet > INT8_MAX) | |||||
return (ERANGE); | |||||
*(int8_t *)outp = (int8_t)octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_INT16: | |||||
*(int16_t *)outp = (int8_t)octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_INT32: | |||||
*(int32_t *)outp = (int8_t)octet; | |||||
break; | |||||
case BHND_NVRAM_TYPE_CHAR: | |||||
#if (CHAR_MAX < UINT8_MAX) | |||||
if (octet > CHAR_MAX) | |||||
return (ERANGE); | |||||
#endif | |||||
*(char *)outp = (char)octet; | |||||
break; | |||||
default: | |||||
printf("unknown type %d\n", type); | |||||
return (EINVAL); | |||||
} | |||||
nbytes += width; | |||||
} | |||||
return (0); | |||||
} | |||||
/** | |||||
* Initialize a new variable hash table with @p nelements. | |||||
* | |||||
* @param map Hash table instance to be initialized. | |||||
* @param nelements The number of hash table buckets to allocate. | |||||
* @param flags Hash table flags (HASH_*). | |||||
*/ | |||||
int | |||||
bhnd_nvram_varmap_init(struct bhnd_nvram_varmap *map, size_t nelements, | |||||
int flags) | |||||
{ | |||||
map->table = hashinit_flags(nelements, M_BHND_NVRAM, &map->mask, | |||||
flags); | |||||
if (map->table == NULL) | |||||
return (ENOMEM); | |||||
return (0); | |||||
} | |||||
/** | |||||
* Deallocate all resources associated with @p map. | |||||
* | |||||
* @param map Hash table to be deallocated. | |||||
*/ | |||||
void | |||||
bhnd_nvram_varmap_free(struct bhnd_nvram_varmap *map) | |||||
{ | |||||
struct bhnd_nvram_tuple *t, *tnext; | |||||
/* Free all elements */ | |||||
for (size_t i = 0; i <= map->mask; i++) { | |||||
LIST_FOREACH_SAFE(t, &map->table[i], t_link, tnext) { | |||||
LIST_REMOVE(t, t_link); | |||||
bhnd_nvram_tuple_free(t); | |||||
} | |||||
} | |||||
/* Free hash table */ | |||||
hashdestroy(map->table, M_BHND_NVRAM, map->mask); | |||||
} | |||||
/** | |||||
* Add a variable entry to @p map. | |||||
* | |||||
* @param map Hash table to modify. | |||||
* @param name Variable name. | |||||
* @param value Variable value. | |||||
* @param value_len The length of @p value, in bytes. | |||||
* | |||||
* @retval 0 success | |||||
* @retval ENOMEM unable to allocate new entry | |||||
*/ | |||||
int | |||||
bhnd_nvram_varmap_add(struct bhnd_nvram_varmap *map, const char *name, | |||||
const char *value, size_t value_len) | |||||
{ | |||||
struct bhnd_nvram_tuples *head; | |||||
struct bhnd_nvram_tuple *t; | |||||
/* Locate target bucket */ | |||||
head = &map->table[hash32_str(name, HASHINIT) & map->mask]; | |||||
/* Allocate new entry */ | |||||
if ((t = bhnd_nvram_tuple_alloc(name, value)) == NULL) | |||||
return (ENOMEM); | |||||
/* Remove any existing entry */ | |||||
bhnd_nvram_varmap_remove(map, name); | |||||
/* Insert new entry */ | |||||
LIST_INSERT_HEAD(head, t, t_link); | |||||
return (0); | |||||
} | |||||
/** | |||||
* Remove @p map in @p tuples, if it exists. | |||||
* | |||||
* @param map Hash table to modify. | |||||
* @param key Key to remove. | |||||
* | |||||
* @retval 0 success | |||||
* @retval ENOENT If @p name is not found in @p map. | |||||
*/ | |||||
int | |||||
bhnd_nvram_varmap_remove(struct bhnd_nvram_varmap *map, const char *name) | |||||
{ | |||||
struct bhnd_nvram_tuples *head; | |||||
struct bhnd_nvram_tuple *t; | |||||
size_t name_len; | |||||
/* Locate target bucket */ | |||||
head = &map->table[hash32_str(name, HASHINIT) & map->mask]; | |||||
name_len = strlen(name); | |||||
LIST_FOREACH(t, head, t_link) { | |||||
if (t->name_len != name_len) | |||||
continue; | |||||
if (strncmp(t->name, name, name_len) != 0) | |||||
continue; | |||||
LIST_REMOVE(t, t_link); | |||||
bhnd_nvram_tuple_free(t); | |||||
return (0); | |||||
} | |||||
/* Not found */ | |||||
return (ENOENT); | |||||
} | |||||
/** | |||||
* Search for @p name in @p map. | |||||
* | |||||
* @param map Hash table to modify. | |||||
* @param name Variable name. | |||||
* @param name_len Length of @p name, not including trailing NUL. | |||||
* | |||||
* @retval bhnd_nvram_tuple If @p name is found in @p map. | |||||
* @retval NULL If @p name is not found. | |||||
*/ | |||||
struct bhnd_nvram_tuple * | |||||
bhnd_nvram_varmap_find(struct bhnd_nvram_varmap *map, const char *name, | |||||
size_t name_len) | |||||
{ | |||||
struct bhnd_nvram_tuples *head; | |||||
struct bhnd_nvram_tuple *t; | |||||
head = &map->table[hash32_str(name, HASHINIT) & map->mask]; | |||||
LIST_FOREACH(t, head, t_link) { | |||||
if (t->name_len != name_len) | |||||
continue; | |||||
if (strncmp(t->name, name, name_len) != 0) | |||||
continue; | |||||
/* Match */ | |||||
return (t); | |||||
} | |||||
/* not found */ | |||||
return (NULL); | |||||
} | |||||
/** | |||||
* Check for @p name in @p map. | |||||
* | |||||
* @param map Hash table to modify. | |||||
* @param name Variable name. | |||||
* @param name_len Length of @p name, not including trailing NUL. | |||||
* | |||||
* @retval true If @p name is found in @p tuples. | |||||
* @retval false If @p name is not found. | |||||
*/ | |||||
bool bhnd_nvram_varmap_contains(struct bhnd_nvram_varmap *map, | |||||
const char *name, size_t name_len) | |||||
{ | |||||
return (bhnd_nvram_varmap_find(map, name, name_len) != NULL); | |||||
} | |||||
/** | |||||
* Allocate a new tuple with @p name and @p value. | |||||
* | |||||
* @param name Variable name. | |||||
* @param value Variable value. | |||||
* | |||||
* @retval bhnd_nvram_tuple success. | |||||
* @retval NULL if allocation fails. | |||||
*/ | |||||
struct bhnd_nvram_tuple * | |||||
bhnd_nvram_tuple_alloc(const char *name, const char *value) | |||||
{ | |||||
struct bhnd_nvram_tuple *t; | |||||
t = malloc(sizeof(*t), M_BHND_NVRAM, M_NOWAIT); | |||||
if (t == NULL) | |||||
return (NULL); | |||||
t->name_len = strlen(name); | |||||
t->name = malloc(t->name_len+1, M_BHND_NVRAM, M_NOWAIT); | |||||
t->value_len = strlen(value); | |||||
t->value = malloc(t->value_len+1, M_BHND_NVRAM, M_NOWAIT); | |||||
if (t->name == NULL || t->value == NULL) | |||||
goto failed; | |||||
strcpy(t->name, name); | |||||
strcpy(t->value, value); | |||||
return (t); | |||||
failed: | |||||
if (t->name != NULL) | |||||
free(t->name, M_BHND_NVRAM); | |||||
if (t->value != NULL) | |||||
free(t->value, M_BHND_NVRAM); | |||||
free(t, M_BHND_NVRAM); | |||||
return (NULL); | |||||
} | |||||
void | |||||
bhnd_nvram_tuple_free(struct bhnd_nvram_tuple *tuple) | |||||
{ | |||||
free(tuple->name, M_BHND_NVRAM); | |||||
free(tuple->value, M_BHND_NVRAM); | |||||
free(tuple, M_BHND_NVRAM); | |||||
} |