[NetLabel]: rework the Netlink attribute handling (part 2)
At the suggestion of Thomas Graf, rewrite NetLabel's use of Netlink attributes
to better follow the common Netlink attribute usage.
Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index a4f40ad..4125a55 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -41,15 +41,37 @@
#include "netlabel_user.h"
#include "netlabel_cipso_v4.h"
+/* Argument struct for cipso_v4_doi_walk() */
+struct netlbl_cipsov4_doiwalk_arg {
+ struct netlink_callback *nl_cb;
+ struct sk_buff *skb;
+ u32 seq;
+};
+
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_cipsov4_gnl_family = {
.id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_CIPSOV4_NAME,
.version = NETLBL_PROTO_VERSION,
- .maxattr = 0,
+ .maxattr = NLBL_CIPSOV4_A_MAX,
};
+/* NetLabel Netlink attribute policy */
+static struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = {
+ [NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MTYPE] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_TAG] = { .type = NLA_U8 },
+ [NLBL_CIPSOV4_A_TAGLST] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSLVLLOC] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSLVLREM] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSLVL] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSLVLLST] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSCATLOC] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSCATREM] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSCAT] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSCATLST] = { .type = NLA_NESTED },
+};
/*
* Helper Functions
@@ -81,6 +103,41 @@
kfree(ptr);
}
+/**
+ * netlbl_cipsov4_add_common - Parse the common sections of a ADD message
+ * @info: the Generic NETLINK info block
+ * @doi_def: the CIPSO V4 DOI definition
+ *
+ * Description:
+ * Parse the common sections of a ADD message and fill in the related values
+ * in @doi_def. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_cipsov4_add_common(struct genl_info *info,
+ struct cipso_v4_doi *doi_def)
+{
+ struct nlattr *nla;
+ int nla_rem;
+ u32 iter = 0;
+
+ doi_def->doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_TAGLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ return -EINVAL;
+
+ nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
+ if (nla->nla_type == NLBL_CIPSOV4_A_TAG) {
+ if (iter > CIPSO_V4_TAG_MAXCNT)
+ return -EINVAL;
+ doi_def->tags[iter++] = nla_get_u8(nla);
+ }
+ if (iter < CIPSO_V4_TAG_MAXCNT)
+ doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
+
+ return 0;
+}
/*
* NetLabel Command Handlers
@@ -88,9 +145,7 @@
/**
* netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
- * @doi: the DOI value
- * @msg: the ADD message data
- * @msg_size: the size of the ADD message buffer
+ * @info: the Generic NETLINK info block
*
* Description:
* Create a new CIPSO_V4_MAP_STD DOI definition based on the given ADD message
@@ -98,29 +153,28 @@
* error.
*
*/
-static int netlbl_cipsov4_add_std(u32 doi, struct nlattr *msg, size_t msg_size)
+static int netlbl_cipsov4_add_std(struct genl_info *info)
{
int ret_val = -EINVAL;
- int msg_len = msg_size;
- u32 num_tags;
- u32 num_lvls;
- u32 num_cats;
struct cipso_v4_doi *doi_def = NULL;
- u32 iter;
- u32 tmp_val_a;
- u32 tmp_val_b;
+ struct nlattr *nla_a;
+ struct nlattr *nla_b;
+ int nla_a_rem;
+ int nla_b_rem;
- if (msg_len < NETLBL_LEN_U32)
- goto add_std_failure;
- num_tags = netlbl_getinc_u32(&msg, &msg_len);
- if (num_tags == 0 || num_tags > CIPSO_V4_TAG_MAXCNT)
- goto add_std_failure;
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
+ !info->attrs[NLBL_CIPSOV4_A_TAGLST] ||
+ !info->attrs[NLBL_CIPSOV4_A_MLSLVLLST])
+ return -EINVAL;
+
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ return -EINVAL;
doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
- if (doi_def == NULL) {
- ret_val = -ENOMEM;
- goto add_std_failure;
- }
+ if (doi_def == NULL)
+ return -ENOMEM;
doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL);
if (doi_def->map.std == NULL) {
ret_val = -ENOMEM;
@@ -128,28 +182,32 @@
}
doi_def->type = CIPSO_V4_MAP_STD;
- for (iter = 0; iter < num_tags; iter++) {
- if (msg_len < NETLBL_LEN_U8)
- goto add_std_failure;
- doi_def->tags[iter] = netlbl_getinc_u8(&msg, &msg_len);
- switch (doi_def->tags[iter]) {
- case CIPSO_V4_TAG_RBITMAP:
- break;
- default:
- goto add_std_failure;
+ ret_val = netlbl_cipsov4_add_common(info, doi_def);
+ if (ret_val != 0)
+ goto add_std_failure;
+
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ nla_for_each_nested(nla_b, nla_a, nla_b_rem)
+ switch (nla_b->nla_type) {
+ case NLBL_CIPSOV4_A_MLSLVLLOC:
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->lvl.local_size)
+ doi_def->map.std->lvl.local_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ case NLBL_CIPSOV4_A_MLSLVLREM:
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->lvl.cipso_size)
+ doi_def->map.std->lvl.cipso_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ }
}
- }
- if (iter < CIPSO_V4_TAG_MAXCNT)
- doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
-
- if (msg_len < 6 * NETLBL_LEN_U32)
- goto add_std_failure;
-
- num_lvls = netlbl_getinc_u32(&msg, &msg_len);
- if (num_lvls == 0)
- goto add_std_failure;
- doi_def->map.std->lvl.local_size = netlbl_getinc_u32(&msg, &msg_len);
- if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS)
+ if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS ||
+ doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
goto add_std_failure;
doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
sizeof(u32),
@@ -158,9 +216,6 @@
ret_val = -ENOMEM;
goto add_std_failure;
}
- doi_def->map.std->lvl.cipso_size = netlbl_getinc_u8(&msg, &msg_len);
- if (doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
- goto add_std_failure;
doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
sizeof(u32),
GFP_KERNEL);
@@ -168,68 +223,101 @@
ret_val = -ENOMEM;
goto add_std_failure;
}
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ struct nlattr *lvl_loc;
+ struct nlattr *lvl_rem;
- num_cats = netlbl_getinc_u32(&msg, &msg_len);
- doi_def->map.std->cat.local_size = netlbl_getinc_u32(&msg, &msg_len);
- if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS)
- goto add_std_failure;
- doi_def->map.std->cat.local = kcalloc(doi_def->map.std->cat.local_size,
- sizeof(u32),
- GFP_KERNEL);
- if (doi_def->map.std->cat.local == NULL) {
- ret_val = -ENOMEM;
- goto add_std_failure;
- }
- doi_def->map.std->cat.cipso_size = netlbl_getinc_u16(&msg, &msg_len);
- if (doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
- goto add_std_failure;
- doi_def->map.std->cat.cipso = kcalloc(doi_def->map.std->cat.cipso_size,
- sizeof(u32),
- GFP_KERNEL);
- if (doi_def->map.std->cat.cipso == NULL) {
- ret_val = -ENOMEM;
- goto add_std_failure;
- }
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
- if (msg_len <
- num_lvls * (NETLBL_LEN_U32 + NETLBL_LEN_U8) +
- num_cats * (NETLBL_LEN_U32 + NETLBL_LEN_U16))
- goto add_std_failure;
+ lvl_loc = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSLVLLOC);
+ lvl_rem = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSLVLREM);
+ if (lvl_loc == NULL || lvl_rem == NULL)
+ goto add_std_failure;
+ doi_def->map.std->lvl.local[nla_get_u32(lvl_loc)] =
+ nla_get_u32(lvl_rem);
+ doi_def->map.std->lvl.cipso[nla_get_u32(lvl_rem)] =
+ nla_get_u32(lvl_loc);
+ }
- for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
- doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
- for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
- doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
- for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
- doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
- for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
- doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
-
- for (iter = 0; iter < num_lvls; iter++) {
- tmp_val_a = netlbl_getinc_u32(&msg, &msg_len);
- tmp_val_b = netlbl_getinc_u8(&msg, &msg_len);
-
- if (tmp_val_a >= doi_def->map.std->lvl.local_size ||
- tmp_val_b >= doi_def->map.std->lvl.cipso_size)
+ if (info->attrs[NLBL_CIPSOV4_A_MLSCATLST]) {
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
goto add_std_failure;
- doi_def->map.std->lvl.cipso[tmp_val_b] = tmp_val_a;
- doi_def->map.std->lvl.local[tmp_val_a] = tmp_val_b;
- }
-
- for (iter = 0; iter < num_cats; iter++) {
- tmp_val_a = netlbl_getinc_u32(&msg, &msg_len);
- tmp_val_b = netlbl_getinc_u16(&msg, &msg_len);
-
- if (tmp_val_a >= doi_def->map.std->cat.local_size ||
- tmp_val_b >= doi_def->map.std->cat.cipso_size)
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSCAT) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
+ nla_for_each_nested(nla_b, nla_a, nla_b_rem)
+ switch (nla_b->nla_type) {
+ case NLBL_CIPSOV4_A_MLSCATLOC:
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->cat.local_size)
+ doi_def->map.std->cat.local_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ case NLBL_CIPSOV4_A_MLSCATREM:
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->cat.cipso_size)
+ doi_def->map.std->cat.cipso_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ }
+ }
+ if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS ||
+ doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
goto add_std_failure;
+ doi_def->map.std->cat.local = kcalloc(
+ doi_def->map.std->cat.local_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->cat.local == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ doi_def->map.std->cat.cipso = kcalloc(
+ doi_def->map.std->cat.cipso_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->cat.cipso == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSCAT) {
+ struct nlattr *cat_loc;
+ struct nlattr *cat_rem;
- doi_def->map.std->cat.cipso[tmp_val_b] = tmp_val_a;
- doi_def->map.std->cat.local[tmp_val_a] = tmp_val_b;
+ cat_loc = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSCATLOC);
+ cat_rem = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSCATREM);
+ if (cat_loc == NULL || cat_rem == NULL)
+ goto add_std_failure;
+ doi_def->map.std->cat.local[
+ nla_get_u32(cat_loc)] =
+ nla_get_u32(cat_rem);
+ doi_def->map.std->cat.cipso[
+ nla_get_u32(cat_rem)] =
+ nla_get_u32(cat_loc);
+ }
}
- doi_def->doi = doi;
ret_val = cipso_v4_doi_add(doi_def);
if (ret_val != 0)
goto add_std_failure;
@@ -243,9 +331,7 @@
/**
* netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
- * @doi: the DOI value
- * @msg: the ADD message data
- * @msg_size: the size of the ADD message buffer
+ * @info: the Generic NETLINK info block
*
* Description:
* Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
@@ -253,52 +339,31 @@
* error.
*
*/
-static int netlbl_cipsov4_add_pass(u32 doi,
- struct nlattr *msg,
- size_t msg_size)
+static int netlbl_cipsov4_add_pass(struct genl_info *info)
{
- int ret_val = -EINVAL;
- int msg_len = msg_size;
- u32 num_tags;
+ int ret_val;
struct cipso_v4_doi *doi_def = NULL;
- u32 iter;
- if (msg_len < NETLBL_LEN_U32)
- goto add_pass_failure;
- num_tags = netlbl_getinc_u32(&msg, &msg_len);
- if (num_tags == 0 || num_tags > CIPSO_V4_TAG_MAXCNT)
- goto add_pass_failure;
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
+ !info->attrs[NLBL_CIPSOV4_A_TAGLST])
+ return -EINVAL;
doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
- if (doi_def == NULL) {
- ret_val = -ENOMEM;
- goto add_pass_failure;
- }
+ if (doi_def == NULL)
+ return -ENOMEM;
doi_def->type = CIPSO_V4_MAP_PASS;
- for (iter = 0; iter < num_tags; iter++) {
- if (msg_len < NETLBL_LEN_U8)
- goto add_pass_failure;
- doi_def->tags[iter] = netlbl_getinc_u8(&msg, &msg_len);
- switch (doi_def->tags[iter]) {
- case CIPSO_V4_TAG_RBITMAP:
- break;
- default:
- goto add_pass_failure;
- }
- }
- if (iter < CIPSO_V4_TAG_MAXCNT)
- doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
+ ret_val = netlbl_cipsov4_add_common(info, doi_def);
+ if (ret_val != 0)
+ goto add_pass_failure;
- doi_def->doi = doi;
ret_val = cipso_v4_doi_add(doi_def);
if (ret_val != 0)
goto add_pass_failure;
return 0;
add_pass_failure:
- if (doi_def)
- netlbl_cipsov4_doi_free(&doi_def->rcu);
+ netlbl_cipsov4_doi_free(&doi_def->rcu);
return ret_val;
}
@@ -316,34 +381,21 @@
{
int ret_val = -EINVAL;
- u32 doi;
u32 map_type;
- int msg_len = netlbl_netlink_payload_len(skb);
- struct nlattr *msg = netlbl_netlink_payload_data(skb);
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
- goto add_return;
+ if (!info->attrs[NLBL_CIPSOV4_A_MTYPE])
+ return -EINVAL;
- if (msg_len < 2 * NETLBL_LEN_U32)
- goto add_return;
-
- doi = netlbl_getinc_u32(&msg, &msg_len);
- map_type = netlbl_getinc_u32(&msg, &msg_len);
+ map_type = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE]);
switch (map_type) {
case CIPSO_V4_MAP_STD:
- ret_val = netlbl_cipsov4_add_std(doi, msg, msg_len);
+ ret_val = netlbl_cipsov4_add_std(info);
break;
case CIPSO_V4_MAP_PASS:
- ret_val = netlbl_cipsov4_add_pass(doi, msg, msg_len);
+ ret_val = netlbl_cipsov4_add_pass(info);
break;
}
-add_return:
- netlbl_netlink_send_ack(info,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_ACK,
- -ret_val);
return ret_val;
}
@@ -353,84 +405,239 @@
* @info: the Generic NETLINK info block
*
* Description:
- * Process a user generated LIST message and respond accordingly. Returns
- * zero on success and negative values on error.
+ * Process a user generated LIST message and respond accordingly. While the
+ * response message generated by the kernel is straightforward, determining
+ * before hand the size of the buffer to allocate is not (we have to generate
+ * the message to know the size). In order to keep this function sane what we
+ * do is allocate a buffer of NLMSG_GOODSIZE and try to fit the response in
+ * that size, if we fail then we restart with a larger buffer and try again.
+ * We continue in this manner until we hit a limit of failed attempts then we
+ * give up and just send an error message. Returns zero on success and
+ * negative values on error.
*
*/
static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val = -EINVAL;
+ int ret_val;
+ struct sk_buff *ans_skb = NULL;
+ u32 nlsze_mult = 1;
+ void *data;
u32 doi;
- struct nlattr *msg = netlbl_netlink_payload_data(skb);
- struct sk_buff *ans_skb;
+ struct nlattr *nla_a;
+ struct nlattr *nla_b;
+ struct cipso_v4_doi *doi_def;
+ u32 iter;
- if (netlbl_netlink_payload_len(skb) != NETLBL_LEN_U32)
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI]) {
+ ret_val = -EINVAL;
goto list_failure;
+ }
- doi = nla_get_u32(msg);
- ans_skb = cipso_v4_doi_dump(doi, NLMSG_SPACE(GENL_HDRLEN));
+list_start:
+ ans_skb = nlmsg_new(NLMSG_GOODSIZE * nlsze_mult, GFP_KERNEL);
if (ans_skb == NULL) {
ret_val = -ENOMEM;
goto list_failure;
}
- netlbl_netlink_hdr_push(ans_skb,
- info->snd_pid,
- 0,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_LIST);
+ data = netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ info->snd_seq,
+ netlbl_cipsov4_gnl_family.id,
+ 0,
+ NLBL_CIPSOV4_C_LIST);
+ if (data == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure;
+ }
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+
+ rcu_read_lock();
+ doi_def = cipso_v4_doi_getdef(doi);
+ if (doi_def == NULL) {
+ ret_val = -EINVAL;
+ goto list_failure;
+ }
+
+ ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type);
+ if (ret_val != 0)
+ goto list_failure_lock;
+
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_TAGLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure_lock;
+ }
+ for (iter = 0;
+ iter < CIPSO_V4_TAG_MAXCNT &&
+ doi_def->tags[iter] != CIPSO_V4_TAG_INVALID;
+ iter++) {
+ ret_val = nla_put_u8(ans_skb,
+ NLBL_CIPSOV4_A_TAG,
+ doi_def->tags[iter]);
+ if (ret_val != 0)
+ goto list_failure_lock;
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ switch (doi_def->type) {
+ case CIPSO_V4_MAP_STD:
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVLLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure_lock;
+ }
+ for (iter = 0;
+ iter < doi_def->map.std->lvl.local_size;
+ iter++) {
+ if (doi_def->map.std->lvl.local[iter] ==
+ CIPSO_V4_INV_LVL)
+ continue;
+
+ nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVL);
+ if (nla_b == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSLVLLOC,
+ iter);
+ if (ret_val != 0)
+ goto list_retry;
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSLVLREM,
+ doi_def->map.std->lvl.local[iter]);
+ if (ret_val != 0)
+ goto list_retry;
+ nla_nest_end(ans_skb, nla_b);
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCATLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ for (iter = 0;
+ iter < doi_def->map.std->cat.local_size;
+ iter++) {
+ if (doi_def->map.std->cat.local[iter] ==
+ CIPSO_V4_INV_CAT)
+ continue;
+
+ nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCAT);
+ if (nla_b == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSCATLOC,
+ iter);
+ if (ret_val != 0)
+ goto list_retry;
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSCATREM,
+ doi_def->map.std->cat.local[iter]);
+ if (ret_val != 0)
+ goto list_retry;
+ nla_nest_end(ans_skb, nla_b);
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ break;
+ }
+ rcu_read_unlock();
+
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
if (ret_val != 0)
goto list_failure;
return 0;
+list_retry:
+ /* XXX - this limit is a guesstimate */
+ if (nlsze_mult < 4) {
+ rcu_read_unlock();
+ kfree_skb(ans_skb);
+ nlsze_mult++;
+ goto list_start;
+ }
+list_failure_lock:
+ rcu_read_unlock();
list_failure:
- netlbl_netlink_send_ack(info,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_ACK,
- -ret_val);
+ kfree_skb(ans_skb);
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_listall_cb - cipso_v4_doi_walk() callback for LISTALL
+ * @doi_def: the CIPSOv4 DOI definition
+ * @arg: the netlbl_cipsov4_doiwalk_arg structure
+ *
+ * Description:
+ * This function is designed to be used as a callback to the
+ * cipso_v4_doi_walk() function for use in generating a response for a LISTALL
+ * message. Returns the size of the message on success, negative values on
+ * failure.
+ *
+ */
+static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg;
+ void *data;
+
+ data = netlbl_netlink_hdr_put(cb_arg->skb,
+ NETLINK_CB(cb_arg->nl_cb->skb).pid,
+ cb_arg->seq,
+ netlbl_cipsov4_gnl_family.id,
+ NLM_F_MULTI,
+ NLBL_CIPSOV4_C_LISTALL);
+ if (data == NULL)
+ goto listall_cb_failure;
+
+ ret_val = nla_put_u32(cb_arg->skb, NLBL_CIPSOV4_A_DOI, doi_def->doi);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+ ret_val = nla_put_u32(cb_arg->skb,
+ NLBL_CIPSOV4_A_MTYPE,
+ doi_def->type);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+
+ return genlmsg_end(cb_arg->skb, data);
+
+listall_cb_failure:
+ genlmsg_cancel(cb_arg->skb, data);
return ret_val;
}
/**
* netlbl_cipsov4_listall - Handle a LISTALL message
* @skb: the NETLINK buffer
- * @info: the Generic NETLINK info block
+ * @cb: the NETLINK callback
*
* Description:
* Process a user generated LISTALL message and respond accordingly. Returns
* zero on success and negative values on error.
*
*/
-static int netlbl_cipsov4_listall(struct sk_buff *skb, struct genl_info *info)
+static int netlbl_cipsov4_listall(struct sk_buff *skb,
+ struct netlink_callback *cb)
{
- int ret_val = -EINVAL;
- struct sk_buff *ans_skb;
+ struct netlbl_cipsov4_doiwalk_arg cb_arg;
+ int doi_skip = cb->args[0];
- ans_skb = cipso_v4_doi_dump_all(NLMSG_SPACE(GENL_HDRLEN));
- if (ans_skb == NULL) {
- ret_val = -ENOMEM;
- goto listall_failure;
- }
- netlbl_netlink_hdr_push(ans_skb,
- info->snd_pid,
- 0,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_LISTALL);
+ cb_arg.nl_cb = cb;
+ cb_arg.skb = skb;
+ cb_arg.seq = cb->nlh->nlmsg_seq;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
- if (ret_val != 0)
- goto listall_failure;
+ cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg);
- return 0;
-
-listall_failure:
- netlbl_netlink_send_ack(info,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_ACK,
- -ret_val);
- return ret_val;
+ cb->args[0] = doi_skip;
+ return skb->len;
}
/**
@@ -445,27 +652,14 @@
*/
static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val;
+ int ret_val = -EINVAL;
u32 doi;
- struct nlattr *msg = netlbl_netlink_payload_data(skb);
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
- goto remove_return;
-
- if (netlbl_netlink_payload_len(skb) != NETLBL_LEN_U32) {
- ret_val = -EINVAL;
- goto remove_return;
+ if (info->attrs[NLBL_CIPSOV4_A_DOI]) {
+ doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+ ret_val = cipso_v4_doi_remove(doi, netlbl_cipsov4_doi_free);
}
- doi = nla_get_u32(msg);
- ret_val = cipso_v4_doi_remove(doi, netlbl_cipsov4_doi_free);
-
-remove_return:
- netlbl_netlink_send_ack(info,
- netlbl_cipsov4_gnl_family.id,
- NLBL_CIPSOV4_C_ACK,
- -ret_val);
return ret_val;
}
@@ -475,14 +669,16 @@
static struct genl_ops netlbl_cipsov4_genl_c_add = {
.cmd = NLBL_CIPSOV4_C_ADD,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_cipsov4_genl_policy,
.doit = netlbl_cipsov4_add,
.dumpit = NULL,
};
static struct genl_ops netlbl_cipsov4_genl_c_remove = {
.cmd = NLBL_CIPSOV4_C_REMOVE,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_cipsov4_genl_policy,
.doit = netlbl_cipsov4_remove,
.dumpit = NULL,
};
@@ -490,6 +686,7 @@
static struct genl_ops netlbl_cipsov4_genl_c_list = {
.cmd = NLBL_CIPSOV4_C_LIST,
.flags = 0,
+ .policy = netlbl_cipsov4_genl_policy,
.doit = netlbl_cipsov4_list,
.dumpit = NULL,
};
@@ -497,8 +694,9 @@
static struct genl_ops netlbl_cipsov4_genl_c_listall = {
.cmd = NLBL_CIPSOV4_C_LISTALL,
.flags = 0,
- .doit = netlbl_cipsov4_listall,
- .dumpit = NULL,
+ .policy = netlbl_cipsov4_genl_policy,
+ .doit = NULL,
+ .dumpit = netlbl_cipsov4_listall,
};
/*
diff --git a/net/netlabel/netlabel_cipso_v4.h b/net/netlabel/netlabel_cipso_v4.h
index 4c6ff4b..f03cf9b 100644
--- a/net/netlabel/netlabel_cipso_v4.h
+++ b/net/netlabel/netlabel_cipso_v4.h
@@ -34,175 +34,71 @@
#include <net/netlabel.h>
/*
- * The following NetLabel payloads are supported by the CIPSO subsystem, all
- * of which are preceeded by the nlmsghdr struct.
- *
- * o ACK:
- * Sent by the kernel in response to an applications message, applications
- * should never send this message.
- *
- * +----------------------+-----------------------+
- * | seq number (32 bits) | return code (32 bits) |
- * +----------------------+-----------------------+
- *
- * seq number: the sequence number of the original message, taken from the
- * nlmsghdr structure
- * return code: return value, based on errno values
+ * The following NetLabel payloads are supported by the CIPSO subsystem.
*
* o ADD:
- * Sent by an application to add a new DOI mapping table, after completion
- * of the task the kernel should ACK this message.
+ * Sent by an application to add a new DOI mapping table.
*
- * +---------------+--------------------+---------------------+
- * | DOI (32 bits) | map type (32 bits) | tag count (32 bits) | ...
- * +---------------+--------------------+---------------------+
+ * Required attributes:
*
- * +-----------------+
- * | tag #X (8 bits) | ... repeated
- * +-----------------+
+ * NLBL_CIPSOV4_A_DOI
+ * NLBL_CIPSOV4_A_MTYPE
+ * NLBL_CIPSOV4_A_TAGLST
*
- * +-------------- ---- --- -- -
- * | mapping data
- * +-------------- ---- --- -- -
+ * If using CIPSO_V4_MAP_STD the following attributes are required:
*
- * DOI: the DOI value
- * map type: the mapping table type (defined in the cipso_ipv4.h header
- * as CIPSO_V4_MAP_*)
- * tag count: the number of tags, must be greater than zero
- * tag: the CIPSO tag for the DOI, tags listed first are given
- * higher priorirty when sending packets
- * mapping data: specific to the map type (see below)
+ * NLBL_CIPSOV4_A_MLSLVLLST
+ * NLBL_CIPSOV4_A_MLSCATLST
*
- * CIPSO_V4_MAP_STD
- *
- * +------------------+-----------------------+----------------------+
- * | levels (32 bits) | max l level (32 bits) | max r level (8 bits) | ...
- * +------------------+-----------------------+----------------------+
- *
- * +----------------------+---------------------+---------------------+
- * | categories (32 bits) | max l cat (32 bits) | max r cat (16 bits) | ...
- * +----------------------+---------------------+---------------------+
- *
- * +--------------------------+-------------------------+
- * | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
- * +--------------------------+-------------------------+
- *
- * +-----------------------------+-----------------------------+
- * | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
- * +-----------------------------+-----------------------------+
- *
- * levels: the number of level mappings
- * max l level: the highest local level
- * max r level: the highest remote/CIPSO level
- * categories: the number of category mappings
- * max l cat: the highest local category
- * max r cat: the highest remote/CIPSO category
- * local level: the local part of a level mapping
- * CIPSO level: the remote/CIPSO part of a level mapping
- * local category: the local part of a category mapping
- * CIPSO category: the remote/CIPSO part of a category mapping
- *
- * CIPSO_V4_MAP_PASS
- *
- * No mapping data is needed for this map type.
+ * If using CIPSO_V4_MAP_PASS no additional attributes are required.
*
* o REMOVE:
* Sent by an application to remove a specific DOI mapping table from the
- * CIPSO V4 system. The kernel should ACK this message.
+ * CIPSO V4 system.
*
- * +---------------+
- * | DOI (32 bits) |
- * +---------------+
+ * Required attributes:
*
- * DOI: the DOI value
+ * NLBL_CIPSOV4_A_DOI
*
* o LIST:
- * Sent by an application to list the details of a DOI definition. The
- * kernel should send an ACK on error or a response as indicated below. The
- * application generated message format is shown below.
+ * Sent by an application to list the details of a DOI definition. On
+ * success the kernel should send a response using the following format.
*
- * +---------------+
- * | DOI (32 bits) |
- * +---------------+
+ * Required attributes:
*
- * DOI: the DOI value
+ * NLBL_CIPSOV4_A_DOI
*
* The valid response message format depends on the type of the DOI mapping,
- * the known formats are shown below.
+ * the defined formats are shown below.
*
- * +--------------------+
- * | map type (32 bits) | ...
- * +--------------------+
+ * Required attributes:
*
- * map type: the DOI mapping table type (defined in the cipso_ipv4.h
- * header as CIPSO_V4_MAP_*)
+ * NLBL_CIPSOV4_A_MTYPE
+ * NLBL_CIPSOV4_A_TAGLST
*
- * (map type == CIPSO_V4_MAP_STD)
+ * If using CIPSO_V4_MAP_STD the following attributes are required:
*
- * +----------------+------------------+----------------------+
- * | tags (32 bits) | levels (32 bits) | categories (32 bits) | ...
- * +----------------+------------------+----------------------+
+ * NLBL_CIPSOV4_A_MLSLVLLST
+ * NLBL_CIPSOV4_A_MLSCATLST
*
- * +-----------------+
- * | tag #X (8 bits) | ... repeated
- * +-----------------+
- *
- * +--------------------------+-------------------------+
- * | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
- * +--------------------------+-------------------------+
- *
- * +-----------------------------+-----------------------------+
- * | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
- * +-----------------------------+-----------------------------+
- *
- * tags: the number of CIPSO tag types
- * levels: the number of level mappings
- * categories: the number of category mappings
- * tag: the tag number, tags listed first are given higher
- * priority when sending packets
- * local level: the local part of a level mapping
- * CIPSO level: the remote/CIPSO part of a level mapping
- * local category: the local part of a category mapping
- * CIPSO category: the remote/CIPSO part of a category mapping
- *
- * (map type == CIPSO_V4_MAP_PASS)
- *
- * +----------------+
- * | tags (32 bits) | ...
- * +----------------+
- *
- * +-----------------+
- * | tag #X (8 bits) | ... repeated
- * +-----------------+
- *
- * tags: the number of CIPSO tag types
- * tag: the tag number, tags listed first are given higher
- * priority when sending packets
+ * If using CIPSO_V4_MAP_PASS no additional attributes are required.
*
* o LISTALL:
* This message is sent by an application to list the valid DOIs on the
- * system. There is no payload and the kernel should respond with an ACK
- * or the following message.
+ * system. When sent by an application there is no payload and the
+ * NLM_F_DUMP flag should be set. The kernel should respond with a series of
+ * the following messages.
*
- * +---------------------+------------------+-----------------------+
- * | DOI count (32 bits) | DOI #X (32 bits) | map type #X (32 bits) |
- * +---------------------+------------------+-----------------------+
+ * Required attributes:
*
- * +-----------------------+
- * | map type #X (32 bits) | ...
- * +-----------------------+
- *
- * DOI count: the number of DOIs
- * DOI: the DOI value
- * map type: the DOI mapping table type (defined in the cipso_ipv4.h
- * header as CIPSO_V4_MAP_*)
+ * NLBL_CIPSOV4_A_DOI
+ * NLBL_CIPSOV4_A_MTYPE
*
*/
/* NetLabel CIPSOv4 commands */
enum {
NLBL_CIPSOV4_C_UNSPEC,
- NLBL_CIPSOV4_C_ACK,
NLBL_CIPSOV4_C_ADD,
NLBL_CIPSOV4_C_REMOVE,
NLBL_CIPSOV4_C_LIST,
@@ -211,6 +107,59 @@
};
#define NLBL_CIPSOV4_C_MAX (__NLBL_CIPSOV4_C_MAX - 1)
+/* NetLabel CIPSOv4 attributes */
+enum {
+ NLBL_CIPSOV4_A_UNSPEC,
+ NLBL_CIPSOV4_A_DOI,
+ /* (NLA_U32)
+ * the DOI value */
+ NLBL_CIPSOV4_A_MTYPE,
+ /* (NLA_U32)
+ * the mapping table type (defined in the cipso_ipv4.h header as
+ * CIPSO_V4_MAP_*) */
+ NLBL_CIPSOV4_A_TAG,
+ /* (NLA_U8)
+ * a CIPSO tag type, meant to be used within a NLBL_CIPSOV4_A_TAGLST
+ * attribute */
+ NLBL_CIPSOV4_A_TAGLST,
+ /* (NLA_NESTED)
+ * the CIPSO tag list for the DOI, there must be at least one
+ * NLBL_CIPSOV4_A_TAG attribute, tags listed first are given higher
+ * priorirty when sending packets */
+ NLBL_CIPSOV4_A_MLSLVLLOC,
+ /* (NLA_U32)
+ * the local MLS sensitivity level */
+ NLBL_CIPSOV4_A_MLSLVLREM,
+ /* (NLA_U32)
+ * the remote MLS sensitivity level */
+ NLBL_CIPSOV4_A_MLSLVL,
+ /* (NLA_NESTED)
+ * a MLS sensitivity level mapping, must contain only one attribute of
+ * each of the following types: NLBL_CIPSOV4_A_MLSLVLLOC and
+ * NLBL_CIPSOV4_A_MLSLVLREM */
+ NLBL_CIPSOV4_A_MLSLVLLST,
+ /* (NLA_NESTED)
+ * the CIPSO level mappings, there must be at least one
+ * NLBL_CIPSOV4_A_MLSLVL attribute */
+ NLBL_CIPSOV4_A_MLSCATLOC,
+ /* (NLA_U32)
+ * the local MLS category */
+ NLBL_CIPSOV4_A_MLSCATREM,
+ /* (NLA_U32)
+ * the remote MLS category */
+ NLBL_CIPSOV4_A_MLSCAT,
+ /* (NLA_NESTED)
+ * a MLS category mapping, must contain only one attribute of each of
+ * the following types: NLBL_CIPSOV4_A_MLSCATLOC and
+ * NLBL_CIPSOV4_A_MLSCATREM */
+ NLBL_CIPSOV4_A_MLSCATLST,
+ /* (NLA_NESTED)
+ * the CIPSO category mappings, there must be at least one
+ * NLBL_CIPSOV4_A_MLSCAT attribute */
+ __NLBL_CIPSOV4_A_MAX,
+};
+#define NLBL_CIPSOV4_A_MAX (__NLBL_CIPSOV4_A_MAX - 1)
+
/* NetLabel protocol functions */
int netlbl_cipsov4_genl_init(void);
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index 85bc11a..8626c9f 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -42,15 +42,29 @@
#include "netlabel_user.h"
#include "netlabel_mgmt.h"
+/* Argument struct for netlbl_domhsh_walk() */
+struct netlbl_domhsh_walk_arg {
+ struct netlink_callback *nl_cb;
+ struct sk_buff *skb;
+ u32 seq;
+};
+
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_mgmt_gnl_family = {
.id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = NETLBL_NLTYPE_MGMT_NAME,
.version = NETLBL_PROTO_VERSION,
- .maxattr = 0,
+ .maxattr = NLBL_MGMT_A_MAX,
};
+/* NetLabel Netlink attribute policy */
+static struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
+ [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING },
+ [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 },
+ [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
+ [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
+};
/*
* NetLabel Command Handlers
@@ -70,97 +84,62 @@
static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
{
int ret_val = -EINVAL;
- struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
- int msg_len = netlbl_netlink_payload_len(skb);
- u32 count;
struct netlbl_dom_map *entry = NULL;
- u32 iter;
+ size_t tmp_size;
u32 tmp_val;
- int tmp_size;
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (!info->attrs[NLBL_MGMT_A_DOMAIN] ||
+ !info->attrs[NLBL_MGMT_A_PROTOCOL])
+ goto add_failure;
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (entry == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
+ entry->domain = kmalloc(tmp_size, GFP_KERNEL);
+ if (entry->domain == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
+ nla_strlcpy(entry->domain, info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
+
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = netlbl_domhsh_add(entry);
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (!info->attrs[NLBL_MGMT_A_CV4DOI])
+ goto add_failure;
+
+ tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
+ /* We should be holding a rcu_read_lock() here while we hold
+ * the result but since the entry will always be deleted when
+ * the CIPSO DOI is deleted we aren't going to keep the
+ * lock. */
+ rcu_read_lock();
+ entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
+ if (entry->type_def.cipsov4 == NULL) {
+ rcu_read_unlock();
+ goto add_failure;
+ }
+ ret_val = netlbl_domhsh_add(entry);
+ rcu_read_unlock();
+ break;
+ default:
+ goto add_failure;
+ }
if (ret_val != 0)
goto add_failure;
- if (msg_len < NETLBL_LEN_U32)
- goto add_failure;
- count = netlbl_getinc_u32(&msg_ptr, &msg_len);
-
- for (iter = 0; iter < count && msg_len > 0; iter++, entry = NULL) {
- if (msg_len <= 0) {
- ret_val = -EINVAL;
- goto add_failure;
- }
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (entry == NULL) {
- ret_val = -ENOMEM;
- goto add_failure;
- }
- tmp_size = nla_len(msg_ptr);
- if (tmp_size <= 0 || tmp_size > msg_len) {
- ret_val = -EINVAL;
- goto add_failure;
- }
- entry->domain = kmalloc(tmp_size, GFP_KERNEL);
- if (entry->domain == NULL) {
- ret_val = -ENOMEM;
- goto add_failure;
- }
- nla_strlcpy(entry->domain, msg_ptr, tmp_size);
- entry->domain[tmp_size - 1] = '\0';
- msg_ptr = nla_next(msg_ptr, &msg_len);
-
- if (msg_len < NETLBL_LEN_U32) {
- ret_val = -EINVAL;
- goto add_failure;
- }
- tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
- entry->type = tmp_val;
- switch (tmp_val) {
- case NETLBL_NLTYPE_UNLABELED:
- ret_val = netlbl_domhsh_add(entry);
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- if (msg_len < NETLBL_LEN_U32) {
- ret_val = -EINVAL;
- goto add_failure;
- }
- tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
- /* We should be holding a rcu_read_lock() here
- * while we hold the result but since the entry
- * will always be deleted when the CIPSO DOI
- * is deleted we aren't going to keep the lock. */
- rcu_read_lock();
- entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
- if (entry->type_def.cipsov4 == NULL) {
- rcu_read_unlock();
- ret_val = -EINVAL;
- goto add_failure;
- }
- ret_val = netlbl_domhsh_add(entry);
- rcu_read_unlock();
- break;
- default:
- ret_val = -EINVAL;
- }
- if (ret_val != 0)
- goto add_failure;
- }
-
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- NETLBL_E_OK);
return 0;
add_failure:
if (entry)
kfree(entry->domain);
kfree(entry);
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
return ret_val;
}
@@ -176,87 +155,98 @@
*/
static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val = -EINVAL;
- struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
- int msg_len = netlbl_netlink_payload_len(skb);
- u32 count;
- u32 iter;
- int tmp_size;
- unsigned char *domain;
+ char *domain;
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (!info->attrs[NLBL_MGMT_A_DOMAIN])
+ return -EINVAL;
+
+ domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]);
+ return netlbl_domhsh_remove(domain);
+}
+
+/**
+ * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL
+ * @entry: the domain mapping hash table entry
+ * @arg: the netlbl_domhsh_walk_arg structure
+ *
+ * Description:
+ * This function is designed to be used as a callback to the
+ * netlbl_domhsh_walk() function for use in generating a response for a LISTALL
+ * message. Returns the size of the message on success, negative values on
+ * failure.
+ *
+ */
+static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_domhsh_walk_arg *cb_arg = arg;
+ void *data;
+
+ data = netlbl_netlink_hdr_put(cb_arg->skb,
+ NETLINK_CB(cb_arg->nl_cb->skb).pid,
+ cb_arg->seq,
+ netlbl_mgmt_gnl_family.id,
+ NLM_F_MULTI,
+ NLBL_MGMT_C_LISTALL);
+ if (data == NULL)
+ goto listall_cb_failure;
+
+ ret_val = nla_put_string(cb_arg->skb,
+ NLBL_MGMT_A_DOMAIN,
+ entry->domain);
if (ret_val != 0)
- goto remove_return;
-
- if (msg_len < NETLBL_LEN_U32)
- goto remove_return;
- count = netlbl_getinc_u32(&msg_ptr, &msg_len);
-
- for (iter = 0; iter < count && msg_len > 0; iter++) {
- if (msg_len <= 0) {
- ret_val = -EINVAL;
- goto remove_return;
- }
- tmp_size = nla_len(msg_ptr);
- domain = nla_data(msg_ptr);
- if (tmp_size <= 0 || tmp_size > msg_len ||
- domain[tmp_size - 1] != '\0') {
- ret_val = -EINVAL;
- goto remove_return;
- }
- ret_val = netlbl_domhsh_remove(domain);
+ goto listall_cb_failure;
+ ret_val = nla_put_u32(cb_arg->skb, NLBL_MGMT_A_PROTOCOL, entry->type);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+ switch (entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = nla_put_u32(cb_arg->skb,
+ NLBL_MGMT_A_CV4DOI,
+ entry->type_def.cipsov4->doi);
if (ret_val != 0)
- goto remove_return;
- msg_ptr = nla_next(msg_ptr, &msg_len);
+ goto listall_cb_failure;
+ break;
}
- ret_val = 0;
+ cb_arg->seq++;
+ return genlmsg_end(cb_arg->skb, data);
-remove_return:
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
+listall_cb_failure:
+ genlmsg_cancel(cb_arg->skb, data);
return ret_val;
}
/**
- * netlbl_mgmt_list - Handle a LIST message
+ * netlbl_mgmt_listall - Handle a LISTALL message
* @skb: the NETLINK buffer
- * @info: the Generic NETLINK info block
+ * @cb: the NETLINK callback
*
* Description:
- * Process a user generated LIST message and dumps the domain hash table in a
- * form suitable for use in a kernel generated LIST message. Returns zero on
- * success, negative values on failure.
+ * Process a user generated LISTALL message and dumps the domain hash table in
+ * a form suitable for use in a kernel generated LISTALL message. Returns zero
+ * on success, negative values on failure.
*
*/
-static int netlbl_mgmt_list(struct sk_buff *skb, struct genl_info *info)
+static int netlbl_mgmt_listall(struct sk_buff *skb,
+ struct netlink_callback *cb)
{
- int ret_val = -ENOMEM;
- struct sk_buff *ans_skb;
+ struct netlbl_domhsh_walk_arg cb_arg;
+ u32 skip_bkt = cb->args[0];
+ u32 skip_chain = cb->args[1];
- ans_skb = netlbl_domhsh_dump(NLMSG_SPACE(GENL_HDRLEN));
- if (ans_skb == NULL)
- goto list_failure;
- netlbl_netlink_hdr_push(ans_skb,
- info->snd_pid,
- 0,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_LIST);
+ cb_arg.nl_cb = cb;
+ cb_arg.skb = skb;
+ cb_arg.seq = cb->nlh->nlmsg_seq;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
- if (ret_val != 0)
- goto list_failure;
+ netlbl_domhsh_walk(&skip_bkt,
+ &skip_chain,
+ netlbl_mgmt_listall_cb,
+ &cb_arg);
- return 0;
-
-list_failure:
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
- return ret_val;
+ cb->args[0] = skip_bkt;
+ cb->args[1] = skip_chain;
+ return skb->len;
}
/**
@@ -272,68 +262,51 @@
static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
{
int ret_val = -EINVAL;
- struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
- int msg_len = netlbl_netlink_payload_len(skb);
struct netlbl_dom_map *entry = NULL;
u32 tmp_val;
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
+ if (!info->attrs[NLBL_MGMT_A_PROTOCOL])
goto adddef_failure;
- if (msg_len < NETLBL_LEN_U32)
- goto adddef_failure;
- tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
-
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (entry == NULL) {
ret_val = -ENOMEM;
goto adddef_failure;
}
+ entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
- entry->type = tmp_val;
switch (entry->type) {
case NETLBL_NLTYPE_UNLABELED:
ret_val = netlbl_domhsh_add_default(entry);
break;
case NETLBL_NLTYPE_CIPSOV4:
- if (msg_len < NETLBL_LEN_U32) {
- ret_val = -EINVAL;
+ if (!info->attrs[NLBL_MGMT_A_CV4DOI])
goto adddef_failure;
- }
- tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
- /* We should be holding a rcu_read_lock here while we
- * hold the result but since the entry will always be
- * deleted when the CIPSO DOI is deleted we are going
- * to skip the lock. */
+
+ tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
+ /* We should be holding a rcu_read_lock() here while we hold
+ * the result but since the entry will always be deleted when
+ * the CIPSO DOI is deleted we aren't going to keep the
+ * lock. */
rcu_read_lock();
entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
if (entry->type_def.cipsov4 == NULL) {
rcu_read_unlock();
- ret_val = -EINVAL;
goto adddef_failure;
}
ret_val = netlbl_domhsh_add_default(entry);
rcu_read_unlock();
break;
default:
- ret_val = -EINVAL;
+ goto adddef_failure;
}
if (ret_val != 0)
goto adddef_failure;
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- NETLBL_E_OK);
return 0;
adddef_failure:
kfree(entry);
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
return ret_val;
}
@@ -349,20 +322,7 @@
*/
static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val;
-
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
- goto removedef_return;
-
- ret_val = netlbl_domhsh_remove_default();
-
-removedef_return:
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
- return ret_val;
+ return netlbl_domhsh_remove_default();
}
/**
@@ -379,88 +339,131 @@
static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
{
int ret_val = -ENOMEM;
- struct sk_buff *ans_skb;
+ struct sk_buff *ans_skb = NULL;
+ void *data;
+ struct netlbl_dom_map *entry;
- ans_skb = netlbl_domhsh_dump_default(NLMSG_SPACE(GENL_HDRLEN));
+ ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (ans_skb == NULL)
+ return -ENOMEM;
+ data = netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ info->snd_seq,
+ netlbl_mgmt_gnl_family.id,
+ 0,
+ NLBL_MGMT_C_LISTDEF);
+ if (data == NULL)
goto listdef_failure;
- netlbl_netlink_hdr_push(ans_skb,
- info->snd_pid,
- 0,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_LISTDEF);
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ rcu_read_lock();
+ entry = netlbl_domhsh_getentry(NULL);
+ if (entry == NULL) {
+ ret_val = -ENOENT;
+ goto listdef_failure_lock;
+ }
+ ret_val = nla_put_u32(ans_skb, NLBL_MGMT_A_PROTOCOL, entry->type);
+ if (ret_val != 0)
+ goto listdef_failure_lock;
+ switch (entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_MGMT_A_CV4DOI,
+ entry->type_def.cipsov4->doi);
+ if (ret_val != 0)
+ goto listdef_failure_lock;
+ break;
+ }
+ rcu_read_unlock();
+
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
if (ret_val != 0)
goto listdef_failure;
-
return 0;
+listdef_failure_lock:
+ rcu_read_unlock();
listdef_failure:
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
+ kfree_skb(ans_skb);
return ret_val;
}
/**
- * netlbl_mgmt_modules - Handle a MODULES message
- * @skb: the NETLINK buffer
- * @info: the Generic NETLINK info block
+ * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response
+ * @skb: the skb to write to
+ * @seq: the NETLINK sequence number
+ * @cb: the NETLINK callback
+ * @protocol: the NetLabel protocol to use in the message
*
* Description:
- * Process a user generated MODULES message and respond accordingly.
+ * This function is to be used in conjunction with netlbl_mgmt_protocols() to
+ * answer a application's PROTOCOLS message. Returns the size of the message
+ * on success, negative values on failure.
*
*/
-static int netlbl_mgmt_modules(struct sk_buff *skb, struct genl_info *info)
+static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ u32 protocol)
{
int ret_val = -ENOMEM;
- size_t data_size;
- u32 mod_count;
- struct sk_buff *ans_skb = NULL;
+ void *data;
- /* unlabeled + cipsov4 */
- mod_count = 2;
+ data = netlbl_netlink_hdr_put(skb,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ netlbl_mgmt_gnl_family.id,
+ NLM_F_MULTI,
+ NLBL_MGMT_C_PROTOCOLS);
+ if (data == NULL)
+ goto protocols_cb_failure;
- data_size = GENL_HDRLEN + NETLBL_LEN_U32 + mod_count * NETLBL_LEN_U32;
- ans_skb = netlbl_netlink_alloc_skb(0, data_size, GFP_KERNEL);
- if (ans_skb == NULL)
- goto modules_failure;
-
- if (netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- 0,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_MODULES) == NULL)
- goto modules_failure;
-
- ret_val = nla_put_u32(ans_skb, NLA_U32, mod_count);
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol);
if (ret_val != 0)
- goto modules_failure;
- ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_NLTYPE_UNLABELED);
- if (ret_val != 0)
- goto modules_failure;
- ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_NLTYPE_CIPSOV4);
- if (ret_val != 0)
- goto modules_failure;
+ goto protocols_cb_failure;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
- if (ret_val != 0)
- goto modules_failure;
+ return genlmsg_end(skb, data);
- return 0;
-
-modules_failure:
- kfree_skb(ans_skb);
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
+protocols_cb_failure:
+ genlmsg_cancel(skb, data);
return ret_val;
}
/**
+ * netlbl_mgmt_protocols - Handle a PROTOCOLS message
+ * @skb: the NETLINK buffer
+ * @cb: the NETLINK callback
+ *
+ * Description:
+ * Process a user generated PROTOCOLS message and respond accordingly.
+ *
+ */
+static int netlbl_mgmt_protocols(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ u32 protos_sent = cb->args[0];
+
+ if (protos_sent == 0) {
+ if (netlbl_mgmt_protocols_cb(skb,
+ cb,
+ NETLBL_NLTYPE_UNLABELED) < 0)
+ goto protocols_return;
+ protos_sent++;
+ }
+ if (protos_sent == 1) {
+ if (netlbl_mgmt_protocols_cb(skb,
+ cb,
+ NETLBL_NLTYPE_CIPSOV4) < 0)
+ goto protocols_return;
+ protos_sent++;
+ }
+
+protocols_return:
+ cb->args[0] = protos_sent;
+ return skb->len;
+}
+
+/**
* netlbl_mgmt_version - Handle a VERSION message
* @skb: the NETLINK buffer
* @info: the Generic NETLINK info block
@@ -474,35 +477,35 @@
{
int ret_val = -ENOMEM;
struct sk_buff *ans_skb = NULL;
+ void *data;
- ans_skb = netlbl_netlink_alloc_skb(0,
- GENL_HDRLEN + NETLBL_LEN_U32,
- GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (ans_skb == NULL)
- goto version_failure;
- if (netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- 0,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_VERSION) == NULL)
+ return -ENOMEM;
+ data = netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ info->snd_seq,
+ netlbl_mgmt_gnl_family.id,
+ 0,
+ NLBL_MGMT_C_VERSION);
+ if (data == NULL)
goto version_failure;
- ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_PROTO_VERSION);
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_MGMT_A_VERSION,
+ NETLBL_PROTO_VERSION);
if (ret_val != 0)
goto version_failure;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
if (ret_val != 0)
goto version_failure;
-
return 0;
version_failure:
kfree_skb(ans_skb);
- netlbl_netlink_send_ack(info,
- netlbl_mgmt_gnl_family.id,
- NLBL_MGMT_C_ACK,
- -ret_val);
return ret_val;
}
@@ -513,35 +516,40 @@
static struct genl_ops netlbl_mgmt_genl_c_add = {
.cmd = NLBL_MGMT_C_ADD,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_add,
.dumpit = NULL,
};
static struct genl_ops netlbl_mgmt_genl_c_remove = {
.cmd = NLBL_MGMT_C_REMOVE,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_remove,
.dumpit = NULL,
};
-static struct genl_ops netlbl_mgmt_genl_c_list = {
- .cmd = NLBL_MGMT_C_LIST,
+static struct genl_ops netlbl_mgmt_genl_c_listall = {
+ .cmd = NLBL_MGMT_C_LISTALL,
.flags = 0,
- .doit = netlbl_mgmt_list,
- .dumpit = NULL,
+ .policy = netlbl_mgmt_genl_policy,
+ .doit = NULL,
+ .dumpit = netlbl_mgmt_listall,
};
static struct genl_ops netlbl_mgmt_genl_c_adddef = {
.cmd = NLBL_MGMT_C_ADDDEF,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_adddef,
.dumpit = NULL,
};
static struct genl_ops netlbl_mgmt_genl_c_removedef = {
.cmd = NLBL_MGMT_C_REMOVEDEF,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_removedef,
.dumpit = NULL,
};
@@ -549,20 +557,23 @@
static struct genl_ops netlbl_mgmt_genl_c_listdef = {
.cmd = NLBL_MGMT_C_LISTDEF,
.flags = 0,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_listdef,
.dumpit = NULL,
};
-static struct genl_ops netlbl_mgmt_genl_c_modules = {
- .cmd = NLBL_MGMT_C_MODULES,
+static struct genl_ops netlbl_mgmt_genl_c_protocols = {
+ .cmd = NLBL_MGMT_C_PROTOCOLS,
.flags = 0,
- .doit = netlbl_mgmt_modules,
- .dumpit = NULL,
+ .policy = netlbl_mgmt_genl_policy,
+ .doit = NULL,
+ .dumpit = netlbl_mgmt_protocols,
};
static struct genl_ops netlbl_mgmt_genl_c_version = {
.cmd = NLBL_MGMT_C_VERSION,
.flags = 0,
+ .policy = netlbl_mgmt_genl_policy,
.doit = netlbl_mgmt_version,
.dumpit = NULL,
};
@@ -596,7 +607,7 @@
if (ret_val != 0)
return ret_val;
ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
- &netlbl_mgmt_genl_c_list);
+ &netlbl_mgmt_genl_c_listall);
if (ret_val != 0)
return ret_val;
ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
@@ -612,7 +623,7 @@
if (ret_val != 0)
return ret_val;
ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
- &netlbl_mgmt_genl_c_modules);
+ &netlbl_mgmt_genl_c_protocols);
if (ret_val != 0)
return ret_val;
ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
diff --git a/net/netlabel/netlabel_mgmt.h b/net/netlabel/netlabel_mgmt.h
index fd6c6ac..3642d3bfc 100644
--- a/net/netlabel/netlabel_mgmt.h
+++ b/net/netlabel/netlabel_mgmt.h
@@ -34,212 +34,137 @@
#include <net/netlabel.h>
/*
- * The following NetLabel payloads are supported by the management interface,
- * all of which are preceeded by the nlmsghdr struct.
- *
- * o ACK:
- * Sent by the kernel in response to an applications message, applications
- * should never send this message.
- *
- * +----------------------+-----------------------+
- * | seq number (32 bits) | return code (32 bits) |
- * +----------------------+-----------------------+
- *
- * seq number: the sequence number of the original message, taken from the
- * nlmsghdr structure
- * return code: return value, based on errno values
+ * The following NetLabel payloads are supported by the management interface.
*
* o ADD:
* Sent by an application to add a domain mapping to the NetLabel system.
- * The kernel should respond with an ACK.
*
- * +-------------------+
- * | domains (32 bits) | ...
- * +-------------------+
+ * Required attributes:
*
- * domains: the number of domains in the message
+ * NLBL_MGMT_A_DOMAIN
+ * NLBL_MGMT_A_PROTOCOL
*
- * +--------------------------+-------------------------+
- * | domain string (variable) | protocol type (32 bits) | ...
- * +--------------------------+-------------------------+
+ * If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
*
- * +-------------- ---- --- -- -
- * | mapping data ... repeated
- * +-------------- ---- --- -- -
+ * NLBL_MGMT_A_CV4DOI
*
- * domain string: the domain string, NULL terminated
- * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
- * mapping data: specific to the map type (see below)
- *
- * NETLBL_NLTYPE_UNLABELED
- *
- * No mapping data for this protocol type.
- *
- * NETLBL_NLTYPE_CIPSOV4
- *
- * +---------------+
- * | doi (32 bits) |
- * +---------------+
- *
- * doi: the CIPSO DOI value
+ * If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
*
* o REMOVE:
* Sent by an application to remove a domain mapping from the NetLabel
- * system. The kernel should ACK this message.
+ * system.
*
- * +-------------------+
- * | domains (32 bits) | ...
- * +-------------------+
+ * Required attributes:
*
- * domains: the number of domains in the message
+ * NLBL_MGMT_A_DOMAIN
*
- * +--------------------------+
- * | domain string (variable) | ...
- * +--------------------------+
- *
- * domain string: the domain string, NULL terminated
- *
- * o LIST:
+ * o LISTALL:
* This message can be sent either from an application or by the kernel in
- * response to an application generated LIST message. When sent by an
- * application there is no payload. The kernel should respond to a LIST
- * message either with a LIST message on success or an ACK message on
- * failure.
+ * response to an application generated LISTALL message. When sent by an
+ * application there is no payload and the NLM_F_DUMP flag should be set.
+ * The kernel should respond with a series of the following messages.
*
- * +-------------------+
- * | domains (32 bits) | ...
- * +-------------------+
+ * Required attributes:
*
- * domains: the number of domains in the message
+ * NLBL_MGMT_A_DOMAIN
+ * NLBL_MGMT_A_PROTOCOL
*
- * +--------------------------+
- * | domain string (variable) | ...
- * +--------------------------+
+ * If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
*
- * +-------------------------+-------------- ---- --- -- -
- * | protocol type (32 bits) | mapping data ... repeated
- * +-------------------------+-------------- ---- --- -- -
+ * NLBL_MGMT_A_CV4DOI
*
- * domain string: the domain string, NULL terminated
- * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
- * mapping data: specific to the map type (see below)
- *
- * NETLBL_NLTYPE_UNLABELED
- *
- * No mapping data for this protocol type.
- *
- * NETLBL_NLTYPE_CIPSOV4
- *
- * +----------------+---------------+
- * | type (32 bits) | doi (32 bits) |
- * +----------------+---------------+
- *
- * type: the CIPSO mapping table type (defined in the cipso_ipv4.h header
- * as CIPSO_V4_MAP_*)
- * doi: the CIPSO DOI value
+ * If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
*
* o ADDDEF:
* Sent by an application to set the default domain mapping for the NetLabel
- * system. The kernel should respond with an ACK.
+ * system.
*
- * +-------------------------+-------------- ---- --- -- -
- * | protocol type (32 bits) | mapping data ... repeated
- * +-------------------------+-------------- ---- --- -- -
+ * Required attributes:
*
- * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
- * mapping data: specific to the map type (see below)
+ * NLBL_MGMT_A_PROTOCOL
*
- * NETLBL_NLTYPE_UNLABELED
+ * If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
*
- * No mapping data for this protocol type.
+ * NLBL_MGMT_A_CV4DOI
*
- * NETLBL_NLTYPE_CIPSOV4
- *
- * +---------------+
- * | doi (32 bits) |
- * +---------------+
- *
- * doi: the CIPSO DOI value
+ * If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
*
* o REMOVEDEF:
* Sent by an application to remove the default domain mapping from the
- * NetLabel system, there is no payload. The kernel should ACK this message.
+ * NetLabel system, there is no payload.
*
* o LISTDEF:
* This message can be sent either from an application or by the kernel in
* response to an application generated LISTDEF message. When sent by an
- * application there is no payload. The kernel should respond to a
- * LISTDEF message either with a LISTDEF message on success or an ACK message
- * on failure.
+ * application there is no payload. On success the kernel should send a
+ * response using the following format.
*
- * +-------------------------+-------------- ---- --- -- -
- * | protocol type (32 bits) | mapping data ... repeated
- * +-------------------------+-------------- ---- --- -- -
+ * Required attributes:
*
- * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
- * mapping data: specific to the map type (see below)
+ * NLBL_MGMT_A_PROTOCOL
*
- * NETLBL_NLTYPE_UNLABELED
+ * If using NETLBL_NLTYPE_CIPSOV4 the following attributes are required:
*
- * No mapping data for this protocol type.
+ * NLBL_MGMT_A_CV4DOI
*
- * NETLBL_NLTYPE_CIPSOV4
+ * If using NETLBL_NLTYPE_UNLABELED no other attributes are required.
*
- * +----------------+---------------+
- * | type (32 bits) | doi (32 bits) |
- * +----------------+---------------+
+ * o PROTOCOLS:
+ * Sent by an application to request a list of configured NetLabel protocols
+ * in the kernel. When sent by an application there is no payload and the
+ * NLM_F_DUMP flag should be set. The kernel should respond with a series of
+ * the following messages.
*
- * type: the CIPSO mapping table type (defined in the cipso_ipv4.h header
- * as CIPSO_V4_MAP_*)
- * doi: the CIPSO DOI value
+ * Required attributes:
*
- * o MODULES:
- * Sent by an application to request a list of configured NetLabel modules
- * in the kernel. When sent by an application there is no payload.
- *
- * +-------------------+
- * | modules (32 bits) | ...
- * +-------------------+
- *
- * modules: the number of modules in the message, if this is an application
- * generated message and the value is zero then return a list of
- * the configured modules
- *
- * +------------------+
- * | module (32 bits) | ... repeated
- * +------------------+
- *
- * module: the module number as defined by NETLBL_NLTYPE_*
+ * NLBL_MGMT_A_PROTOCOL
*
* o VERSION:
- * Sent by an application to request the NetLabel version string. When sent
- * by an application there is no payload. This message type is also used by
- * the kernel to respond to an VERSION request.
+ * Sent by an application to request the NetLabel version. When sent by an
+ * application there is no payload. This message type is also used by the
+ * kernel to respond to an VERSION request.
*
- * +-------------------+
- * | version (32 bits) |
- * +-------------------+
+ * Required attributes:
*
- * version: the protocol version number
+ * NLBL_MGMT_A_VERSION
*
*/
/* NetLabel Management commands */
enum {
NLBL_MGMT_C_UNSPEC,
- NLBL_MGMT_C_ACK,
NLBL_MGMT_C_ADD,
NLBL_MGMT_C_REMOVE,
- NLBL_MGMT_C_LIST,
+ NLBL_MGMT_C_LISTALL,
NLBL_MGMT_C_ADDDEF,
NLBL_MGMT_C_REMOVEDEF,
NLBL_MGMT_C_LISTDEF,
- NLBL_MGMT_C_MODULES,
+ NLBL_MGMT_C_PROTOCOLS,
NLBL_MGMT_C_VERSION,
__NLBL_MGMT_C_MAX,
};
#define NLBL_MGMT_C_MAX (__NLBL_MGMT_C_MAX - 1)
+/* NetLabel Management attributes */
+enum {
+ NLBL_MGMT_A_UNSPEC,
+ NLBL_MGMT_A_DOMAIN,
+ /* (NLA_NUL_STRING)
+ * the NULL terminated LSM domain string */
+ NLBL_MGMT_A_PROTOCOL,
+ /* (NLA_U32)
+ * the NetLabel protocol type (defined by NETLBL_NLTYPE_*) */
+ NLBL_MGMT_A_VERSION,
+ /* (NLA_U32)
+ * the NetLabel protocol version number (defined by
+ * NETLBL_PROTO_VERSION) */
+ NLBL_MGMT_A_CV4DOI,
+ /* (NLA_U32)
+ * the CIPSOv4 DOI value */
+ __NLBL_MGMT_A_MAX,
+};
+#define NLBL_MGMT_A_MAX (__NLBL_MGMT_A_MAX - 1)
+
/* NetLabel protocol functions */
int netlbl_mgmt_genl_init(void);
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 785f496..440f5c4 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -55,9 +55,13 @@
.hdrsize = 0,
.name = NETLBL_NLTYPE_UNLABELED_NAME,
.version = NETLBL_PROTO_VERSION,
- .maxattr = 0,
+ .maxattr = NLBL_UNLABEL_A_MAX,
};
+/* NetLabel Netlink attribute policy */
+static struct nla_policy netlbl_unlabel_genl_policy[NLBL_UNLABEL_A_MAX + 1] = {
+ [NLBL_UNLABEL_A_ACPTFLG] = { .type = NLA_U8 },
+};
/*
* NetLabel Command Handlers
@@ -75,31 +79,18 @@
*/
static int netlbl_unlabel_accept(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val;
- struct nlattr *data = netlbl_netlink_payload_data(skb);
- u32 value;
+ int ret_val = -EINVAL;
+ u8 value;
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
- return ret_val;
-
- if (netlbl_netlink_payload_len(skb) == NETLBL_LEN_U32) {
- value = nla_get_u32(data);
+ if (info->attrs[NLBL_UNLABEL_A_ACPTFLG]) {
+ value = nla_get_u8(info->attrs[NLBL_UNLABEL_A_ACPTFLG]);
if (value == 1 || value == 0) {
atomic_set(&netlabel_unlabel_accept_flg, value);
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- NETLBL_E_OK);
- return 0;
+ ret_val = 0;
}
}
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- EINVAL);
- return -EINVAL;
+ return ret_val;
}
/**
@@ -114,39 +105,39 @@
*/
static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val = -ENOMEM;
+ int ret_val = -EINVAL;
struct sk_buff *ans_skb;
+ void *data;
- ans_skb = netlbl_netlink_alloc_skb(0,
- GENL_HDRLEN + NETLBL_LEN_U32,
- GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (ans_skb == NULL)
goto list_failure;
-
- if (netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- 0,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_LIST) == NULL)
+ data = netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ info->snd_seq,
+ netlbl_unlabel_gnl_family.id,
+ 0,
+ NLBL_UNLABEL_C_LIST);
+ if (data == NULL) {
+ ret_val = -ENOMEM;
goto list_failure;
+ }
- ret_val = nla_put_u32(ans_skb,
- NLA_U32,
- atomic_read(&netlabel_unlabel_accept_flg));
+ ret_val = nla_put_u8(ans_skb,
+ NLBL_UNLABEL_A_ACPTFLG,
+ atomic_read(&netlabel_unlabel_accept_flg));
if (ret_val != 0)
goto list_failure;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
if (ret_val != 0)
goto list_failure;
-
return 0;
list_failure:
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- -ret_val);
+ kfree(ans_skb);
return ret_val;
}
@@ -157,7 +148,8 @@
static struct genl_ops netlbl_unlabel_genl_c_accept = {
.cmd = NLBL_UNLABEL_C_ACCEPT,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_unlabel_genl_policy,
.doit = netlbl_unlabel_accept,
.dumpit = NULL,
};
@@ -165,6 +157,7 @@
static struct genl_ops netlbl_unlabel_genl_c_list = {
.cmd = NLBL_UNLABEL_C_LIST,
.flags = 0,
+ .policy = netlbl_unlabel_genl_policy,
.doit = netlbl_unlabel_list,
.dumpit = NULL,
};
@@ -218,10 +211,8 @@
*/
int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr)
{
- if (atomic_read(&netlabel_unlabel_accept_flg) == 1) {
- memset(secattr, 0, sizeof(*secattr));
- return 0;
- }
+ if (atomic_read(&netlabel_unlabel_accept_flg) == 1)
+ return netlbl_secattr_init(secattr);
return -ENOMSG;
}
diff --git a/net/netlabel/netlabel_unlabeled.h b/net/netlabel/netlabel_unlabeled.h
index f300e54..c2917fb 100644
--- a/net/netlabel/netlabel_unlabeled.h
+++ b/net/netlabel/netlabel_unlabeled.h
@@ -36,56 +36,47 @@
/*
* The following NetLabel payloads are supported by the Unlabeled subsystem.
*
- * o ACK:
- * Sent by the kernel in response to an applications message, applications
- * should never send this message.
- *
- * +----------------------+-----------------------+
- * | seq number (32 bits) | return code (32 bits) |
- * +----------------------+-----------------------+
- *
- * seq number: the sequence number of the original message, taken from the
- * nlmsghdr structure
- * return code: return value, based on errno values
- *
* o ACCEPT
* This message is sent from an application to specify if the kernel should
* allow unlabled packets to pass if they do not match any of the static
* mappings defined in the unlabeled module.
*
- * +-----------------+
- * | allow (32 bits) |
- * +-----------------+
+ * Required attributes:
*
- * allow: if true (1) then allow the packets to pass, if false (0) then
- * reject the packets
+ * NLBL_UNLABEL_A_ACPTFLG
*
* o LIST
* This message can be sent either from an application or by the kernel in
* response to an application generated LIST message. When sent by an
* application there is no payload. The kernel should respond to a LIST
- * message either with a LIST message on success or an ACK message on
- * failure.
+ * message with a LIST message on success.
*
- * +-----------------------+
- * | accept flag (32 bits) |
- * +-----------------------+
+ * Required attributes:
*
- * accept flag: if true (1) then unlabeled packets are allowed to pass,
- * if false (0) then unlabeled packets are rejected
+ * NLBL_UNLABEL_A_ACPTFLG
*
*/
/* NetLabel Unlabeled commands */
enum {
NLBL_UNLABEL_C_UNSPEC,
- NLBL_UNLABEL_C_ACK,
NLBL_UNLABEL_C_ACCEPT,
NLBL_UNLABEL_C_LIST,
__NLBL_UNLABEL_C_MAX,
};
#define NLBL_UNLABEL_C_MAX (__NLBL_UNLABEL_C_MAX - 1)
+/* NetLabel Unlabeled attributes */
+enum {
+ NLBL_UNLABEL_A_UNSPEC,
+ NLBL_UNLABEL_A_ACPTFLG,
+ /* (NLA_U8)
+ * if true then unlabeled packets are allowed to pass, else unlabeled
+ * packets are rejected */
+ __NLBL_UNLABEL_A_MAX,
+};
+#define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1)
+
/* NetLabel protocol functions */
int netlbl_unlabel_genl_init(void);