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loader: strings in nvlist are counted strings, not c-strings

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We need to fetch both string size and data, then handle the data.

Reviewed by:	allanjude
Sponsored by:	Netflix, Klara Inc.
This commit is contained in:
Toomas Soome 2020-06-17 10:41:01 +00:00
parent 1f73e3e4a4
commit c98740b5e2
1 changed files with 83 additions and 62 deletions
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145
stand/libsa/zfs/zfsimpl.c
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@ -198,7 +198,7 @@ xdr_uint64_t(const unsigned char **xdr, uint64_t *lp)
static int
nvlist_find(const unsigned char *nvlist, const char *name, int type,
int *elementsp, void *valuep)
int *elementsp, void *valuep, int *sizep)
{
const unsigned char *p, *pair;
int junk;
@ -230,6 +230,8 @@ nvlist_find(const unsigned char *nvlist, const char *name, int type,
} else if (type == DATA_TYPE_STRING) {
int len;
xdr_int(&p, &len);
if (sizep != NULL)
*sizep = len;
(*(const char **)valuep) = (const char *)p;
return (0);
} else if (type == DATA_TYPE_NVLIST ||
@ -394,7 +396,7 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent)
for (i = 0; i < indent; i++)
printf(" ");
printf("%s %s", typenames[pairtype], pairname);
printf("%s %.*s", typenames[pairtype], namelen, pairname);
xdr_int(&p, &elements);
switch (pairtype) {
@ -408,7 +410,7 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent)
case DATA_TYPE_STRING: {
int len;
xdr_int(&p, &len);
printf(" = \"%s\"\n", p);
printf(" = \"%.*s\"\n", len, p);
break;
}
@ -424,8 +426,8 @@ nvlist_print(const unsigned char *nvlist, unsigned int indent)
if (j != elements - 1) {
for (i = 0; i < indent; i++)
printf(" ");
printf("%s %s", typenames[pairtype],
pairname);
printf("%s %.*s", typenames[pairtype],
namelen, pairname);
}
}
break;
@ -1088,17 +1090,17 @@ vdev_set_initial_state(vdev_t *vdev, const unsigned char *nvlist)
is_offline = is_removed = is_faulted = is_degraded = isnt_present = 0;
is_log = 0;
(void) nvlist_find(nvlist, ZPOOL_CONFIG_OFFLINE, DATA_TYPE_UINT64, NULL,
&is_offline);
&is_offline, NULL);
(void) nvlist_find(nvlist, ZPOOL_CONFIG_REMOVED, DATA_TYPE_UINT64, NULL,
&is_removed);
&is_removed, NULL);
(void) nvlist_find(nvlist, ZPOOL_CONFIG_FAULTED, DATA_TYPE_UINT64, NULL,
&is_faulted);
&is_faulted, NULL);
(void) nvlist_find(nvlist, ZPOOL_CONFIG_DEGRADED, DATA_TYPE_UINT64,
NULL, &is_degraded);
NULL, &is_degraded, NULL);
(void) nvlist_find(nvlist, ZPOOL_CONFIG_NOT_PRESENT, DATA_TYPE_UINT64,
NULL, &isnt_present);
NULL, &isnt_present, NULL);
(void) nvlist_find(nvlist, ZPOOL_CONFIG_IS_LOG, DATA_TYPE_UINT64, NULL,
&is_log);
&is_log, NULL);
if (is_offline != 0)
vdev->v_state = VDEV_STATE_OFFLINE;
@ -1120,34 +1122,37 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp)
uint64_t id, ashift, asize, nparity;
const char *path;
const char *type;
int len, pathlen;
char *name;
vdev_t *vdev;
if (nvlist_find(nvlist, ZPOOL_CONFIG_ID, DATA_TYPE_UINT64, NULL, &id) ||
if (nvlist_find(nvlist, ZPOOL_CONFIG_ID, DATA_TYPE_UINT64, NULL, &id,
NULL) ||
nvlist_find(nvlist, ZPOOL_CONFIG_TYPE, DATA_TYPE_STRING,
NULL, &type)) {
NULL, &type, &len)) {
return (ENOENT);
}
if (strcmp(type, VDEV_TYPE_MIRROR) != 0 &&
strcmp(type, VDEV_TYPE_DISK) != 0 &&
if (memcmp(type, VDEV_TYPE_MIRROR, len) != 0 &&
memcmp(type, VDEV_TYPE_DISK, len) != 0 &&
#ifdef ZFS_TEST
strcmp(type, VDEV_TYPE_FILE) != 0 &&
memcmp(type, VDEV_TYPE_FILE, len) != 0 &&
#endif
strcmp(type, VDEV_TYPE_RAIDZ) != 0 &&
strcmp(type, VDEV_TYPE_INDIRECT) != 0 &&
strcmp(type, VDEV_TYPE_REPLACING) != 0) {
memcmp(type, VDEV_TYPE_RAIDZ, len) != 0 &&
memcmp(type, VDEV_TYPE_INDIRECT, len) != 0 &&
memcmp(type, VDEV_TYPE_REPLACING, len) != 0) {
printf("ZFS: can only boot from disk, mirror, raidz1, "
"raidz2 and raidz3 vdevs\n");
return (EIO);
}
if (strcmp(type, VDEV_TYPE_MIRROR) == 0)
if (memcmp(type, VDEV_TYPE_MIRROR, len) == 0)
vdev = vdev_create(guid, vdev_mirror_read);
else if (strcmp(type, VDEV_TYPE_RAIDZ) == 0)
else if (memcmp(type, VDEV_TYPE_RAIDZ, len) == 0)
vdev = vdev_create(guid, vdev_raidz_read);
else if (strcmp(type, VDEV_TYPE_REPLACING) == 0)
else if (memcmp(type, VDEV_TYPE_REPLACING, len) == 0)
vdev = vdev_create(guid, vdev_replacing_read);
else if (strcmp(type, VDEV_TYPE_INDIRECT) == 0) {
else if (memcmp(type, VDEV_TYPE_INDIRECT, len) == 0) {
vdev_indirect_config_t *vic;
vdev = vdev_create(guid, vdev_indirect_read);
@ -1158,15 +1163,15 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp)
nvlist_find(nvlist,
ZPOOL_CONFIG_INDIRECT_OBJECT,
DATA_TYPE_UINT64,
NULL, &vic->vic_mapping_object);
NULL, &vic->vic_mapping_object, NULL);
nvlist_find(nvlist,
ZPOOL_CONFIG_INDIRECT_BIRTHS,
DATA_TYPE_UINT64,
NULL, &vic->vic_births_object);
NULL, &vic->vic_births_object, NULL);
nvlist_find(nvlist,
ZPOOL_CONFIG_PREV_INDIRECT_VDEV,
DATA_TYPE_UINT64,
NULL, &vic->vic_prev_indirect_vdev);
NULL, &vic->vic_prev_indirect_vdev, NULL);
}
} else {
vdev = vdev_create(guid, vdev_disk_read);
@ -1178,39 +1183,45 @@ vdev_init(uint64_t guid, const unsigned char *nvlist, vdev_t **vdevp)
vdev_set_initial_state(vdev, nvlist);
vdev->v_id = id;
if (nvlist_find(nvlist, ZPOOL_CONFIG_ASHIFT,
DATA_TYPE_UINT64, NULL, &ashift) == 0)
DATA_TYPE_UINT64, NULL, &ashift, NULL) == 0)
vdev->v_ashift = ashift;
if (nvlist_find(nvlist, ZPOOL_CONFIG_ASIZE,
DATA_TYPE_UINT64, NULL, &asize) == 0) {
DATA_TYPE_UINT64, NULL, &asize, NULL) == 0) {
vdev->v_psize = asize +
VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE;
}
if (nvlist_find(nvlist, ZPOOL_CONFIG_NPARITY,
DATA_TYPE_UINT64, NULL, &nparity) == 0)
DATA_TYPE_UINT64, NULL, &nparity, NULL) == 0)
vdev->v_nparity = nparity;
if (nvlist_find(nvlist, ZPOOL_CONFIG_PATH,
DATA_TYPE_STRING, NULL, &path) == 0) {
if (strncmp(path, "/dev/", 5) == 0)
path += 5;
vdev->v_name = strdup(path);
} else {
char *name;
DATA_TYPE_STRING, NULL, &path, &pathlen) == 0) {
char prefix[] = "/dev/";
len = strlen(prefix);
if (memcmp(path, prefix, len) == 0) {
path += len;
pathlen -= len;
}
name = malloc(pathlen + 1);
bcopy(path, name, pathlen);
name[pathlen] = '\0';
vdev->v_name = name;
} else {
name = NULL;
if (strcmp(type, "raidz") == 0) {
if (memcmp(type, VDEV_TYPE_RAIDZ, len) == 0) {
if (vdev->v_nparity < 1 ||
vdev->v_nparity > 3) {
printf("ZFS: invalid raidz parity: %d\n",
vdev->v_nparity);
return (EIO);
}
(void) asprintf(&name, "%s%d-%" PRIu64, type,
(void) asprintf(&name, "%.*s%d-%" PRIu64, len, type,
vdev->v_nparity, id);
} else {
(void) asprintf(&name, "%s-%" PRIu64, type, id);
(void) asprintf(&name, "%.*s-%" PRIu64, len, type, id);
}
vdev->v_name = name;
}
@ -1314,13 +1325,13 @@ vdev_from_nvlist(spa_t *spa, uint64_t top_guid, const unsigned char *nvlist)
/* Add children if there are any. */
rc = nvlist_find(nvlist, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY,
&nkids, &kids);
&nkids, &kids, NULL);
if (rc == 0) {
for (int i = 0; i < nkids; i++) {
uint64_t guid;
rc = nvlist_find(kids, ZPOOL_CONFIG_GUID,
DATA_TYPE_UINT64, NULL, &guid);
DATA_TYPE_UINT64, NULL, &guid, NULL);
if (rc != 0)
return (rc);
rc = vdev_init(guid, kids, &vdev);
@ -1351,11 +1362,11 @@ vdev_init_from_label(spa_t *spa, const unsigned char *nvlist)
const unsigned char *vdevs;
if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64,
NULL, &pool_guid) ||
NULL, &pool_guid, NULL) ||
nvlist_find(nvlist, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64,
NULL, &top_guid) ||
NULL, &top_guid, NULL) ||
nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_TREE, DATA_TYPE_NVLIST,
NULL, &vdevs)) {
NULL, &vdevs, NULL)) {
printf("ZFS: can't find vdev details\n");
return (ENOENT);
}
@ -1422,13 +1433,13 @@ vdev_update_from_nvlist(uint64_t top_guid, const unsigned char *nvlist)
/* Update children if there are any. */
rc = nvlist_find(nvlist, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY,
&nkids, &kids);
&nkids, &kids, NULL);
if (rc == 0) {
for (int i = 0; i < nkids; i++) {
uint64_t guid;
rc = nvlist_find(kids, ZPOOL_CONFIG_GUID,
DATA_TYPE_UINT64, NULL, &guid);
DATA_TYPE_UINT64, NULL, &guid, NULL);
if (rc != 0)
break;
@ -1453,11 +1464,11 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist)
int rc, nkids;
if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64,
NULL, &pool_guid) ||
NULL, &pool_guid, NULL) ||
nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_CHILDREN, DATA_TYPE_UINT64,
NULL, &vdev_children) ||
NULL, &vdev_children, NULL) ||
nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_TREE, DATA_TYPE_NVLIST,
NULL, &vdevs)) {
NULL, &vdevs, NULL)) {
printf("ZFS: can't find vdev details\n");
return (ENOENT);
}
@ -1469,7 +1480,7 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist)
spa->spa_root_vdev->v_nchildren = vdev_children;
rc = nvlist_find(vdevs, ZPOOL_CONFIG_CHILDREN, DATA_TYPE_NVLIST_ARRAY,
&nkids, &kids);
&nkids, &kids, NULL);
/*
* MOS config has at least one child for root vdev.
@ -1482,7 +1493,7 @@ vdev_init_from_nvlist(spa_t *spa, const unsigned char *nvlist)
vdev_t *vdev;
rc = nvlist_find(kids, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64,
NULL, &guid);
NULL, &guid, NULL);
if (rc != 0)
break;
vdev = vdev_find(guid);
@ -1841,7 +1852,7 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg)
nvlist = (const unsigned char *) label->vp_nvlist + 4;
error = nvlist_find(nvlist, ZPOOL_CONFIG_POOL_TXG,
DATA_TYPE_UINT64, NULL, &label_txg);
DATA_TYPE_UINT64, NULL, &label_txg, NULL);
if (error != 0 || label_txg == 0) {
memcpy(nvl, nvlist, nvl_size);
goto done;
@ -1856,7 +1867,7 @@ vdev_label_read_config(vdev_t *vd, uint64_t txg)
* because we can get bad value from BIOS.
*/
if (nvlist_find(nvlist, ZPOOL_CONFIG_ASIZE,
DATA_TYPE_UINT64, NULL, &asize) == 0) {
DATA_TYPE_UINT64, NULL, &asize, NULL) == 0) {
vd->v_psize = asize +
VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE;
}
@ -1909,7 +1920,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
uint64_t pool_txg, pool_guid;
const char *pool_name;
const unsigned char *features;
int rc;
int rc, namelen;
/*
* Load the vdev label and figure out which
@ -1930,7 +1941,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
return (EIO);
if (nvlist_find(nvlist, ZPOOL_CONFIG_VERSION, DATA_TYPE_UINT64,
NULL, &val) != 0) {
NULL, &val, NULL) != 0) {
free(nvlist);
return (EIO);
}
@ -1944,14 +1955,14 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
/* Check ZFS features for read */
if (nvlist_find(nvlist, ZPOOL_CONFIG_FEATURES_FOR_READ,
DATA_TYPE_NVLIST, NULL, &features) == 0 &&
DATA_TYPE_NVLIST, NULL, &features, NULL) == 0 &&
nvlist_check_features_for_read(features) != 0) {
free(nvlist);
return (EIO);
}
if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_STATE, DATA_TYPE_UINT64,
NULL, &val) != 0) {
NULL, &val, NULL) != 0) {
free(nvlist);
return (EIO);
}
@ -1963,11 +1974,11 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
}
if (nvlist_find(nvlist, ZPOOL_CONFIG_POOL_TXG, DATA_TYPE_UINT64,
NULL, &pool_txg) != 0 ||
NULL, &pool_txg, NULL) != 0 ||
nvlist_find(nvlist, ZPOOL_CONFIG_POOL_GUID, DATA_TYPE_UINT64,
NULL, &pool_guid) != 0 ||
NULL, &pool_guid, NULL) != 0 ||
nvlist_find(nvlist, ZPOOL_CONFIG_POOL_NAME, DATA_TYPE_STRING,
NULL, &pool_name) != 0) {
NULL, &pool_name, &namelen) != 0) {
/*
* Cache and spare devices end up here - just ignore
* them.
@ -1981,9 +1992,19 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
*/
spa = spa_find_by_guid(pool_guid);
if (spa == NULL) {
char *name;
nvlist_find(nvlist, ZPOOL_CONFIG_VDEV_CHILDREN,
DATA_TYPE_UINT64, NULL, &vdev_children);
spa = spa_create(pool_guid, pool_name);
DATA_TYPE_UINT64, NULL, &vdev_children, NULL);
name = malloc(namelen + 1);
if (name == NULL) {
free(nvlist);
return (ENOMEM);
}
bcopy(pool_name, name, namelen);
name[namelen] = '\0';
spa = spa_create(pool_guid, name);
free(name);
if (spa == NULL) {
free(nvlist);
return (ENOMEM);
@ -2000,7 +2021,7 @@ vdev_probe(vdev_phys_read_t *_read, void *read_priv, spa_t **spap)
* disks etc).
*/
if (nvlist_find(nvlist, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64,
NULL, &guid) != 0) {
NULL, &guid, NULL) != 0) {
free(nvlist);
return (EIO);
}