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authorPaul Moore <paul.moore@hp.com>2006-09-25 15:56:37 -0700
committerDavid S. Miller <davem@davemloft.net>2006-09-25 15:56:37 -0700
commitfd3858554b62c3af6b7664b5c58ad864c87116c9 (patch)
tree9b01a61ed88a19331565649f04373a08ca3d3aa6 /net/netlabel/netlabel_cipso_v4.c
parentfcd48280643e92ec6cb29a04e9079dd7b6b5bfef (diff)
[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>
Diffstat (limited to 'net/netlabel/netlabel_cipso_v4.c')
-rw-r--r--net/netlabel/netlabel_cipso_v4.c628
1 files changed, 413 insertions, 215 deletions
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index a4f40adc447b..4125a55f469f 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 @@ static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
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 @@ static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
/**
* 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 @@ static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
* 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 @@ static int netlbl_cipsov4_add_std(u32 doi, struct nlattr *msg, size_t msg_size)
}
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;
- }
- }
- if (iter < CIPSO_V4_TAG_MAXCNT)
- doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
-
- if (msg_len < 6 * NETLBL_LEN_U32)
+ ret_val = netlbl_cipsov4_add_common(info, doi_def);
+ if (ret_val != 0)
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)
+ 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 (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 @@ static int netlbl_cipsov4_add_std(u32 doi, struct nlattr *msg, size_t msg_size)
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 @@ static int netlbl_cipsov4_add_std(u32 doi, struct nlattr *msg, size_t msg_size)
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;
+
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ 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);
+ }
- 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,
+ 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;
+
+ 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_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,
+ 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;
- }
-
- if (msg_len <
- num_lvls * (NETLBL_LEN_U32 + NETLBL_LEN_U8) +
- num_cats * (NETLBL_LEN_U32 + NETLBL_LEN_U16))
- goto add_std_failure;
-
- 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)
- 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)
+ if (doi_def->map.std->cat.cipso == NULL) {
+ ret_val = -ENOMEM;
goto add_std_failure;
-
- doi_def->map.std->cat.cipso[tmp_val_b] = tmp_val_a;
- doi_def->map.std->cat.local[tmp_val_a] = tmp_val_b;
+ }
+ 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;
+
+ 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 @@ add_std_failure:
/**
* 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 @@ add_std_failure:
* 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 @@ static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
{
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 (msg_len < 2 * NETLBL_LEN_U32)
- goto add_return;
+ if (!info->attrs[NLBL_CIPSOV4_A_MTYPE])
+ return -EINVAL;
- 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 @@ add_return:
* @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;
+ }
+
+ 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();
- 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_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;
-
- return 0;
+ cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg);
-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 @@ listall_failure:
*/
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 @@ remove_return:
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_remove = {
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_list = {
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,
};
/*

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