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-rw-r--r--tools/bpf/bpftool/net.c10
-rw-r--r--tools/bpf/bpftool/netlink_dumper.c32
-rw-r--r--tools/lib/bpf/netlink.c10
-rw-r--r--tools/lib/bpf/nlattr.c64
-rw-r--r--tools/lib/bpf/nlattr.h59
5 files changed, 94 insertions, 81 deletions
diff --git a/tools/bpf/bpftool/net.c b/tools/bpf/bpftool/net.c
index ef83e8a08490..d441bb7035ca 100644
--- a/tools/bpf/bpftool/net.c
+++ b/tools/bpf/bpftool/net.c
@@ -69,7 +69,9 @@ static int dump_link_nlmsg(void *cookie, void *msg, struct nlattr **tb)
snprintf(netinfo->devices[netinfo->used_len].devname,
sizeof(netinfo->devices[netinfo->used_len].devname),
"%s",
- tb[IFLA_IFNAME] ? nla_getattr_str(tb[IFLA_IFNAME]) : "");
+ tb[IFLA_IFNAME]
+ ? libbpf_nla_getattr_str(tb[IFLA_IFNAME])
+ : "");
netinfo->used_len++;
return do_xdp_dump(ifinfo, tb);
@@ -83,7 +85,7 @@ static int dump_class_qdisc_nlmsg(void *cookie, void *msg, struct nlattr **tb)
if (tcinfo->is_qdisc) {
/* skip clsact qdisc */
if (tb[TCA_KIND] &&
- strcmp(nla_data(tb[TCA_KIND]), "clsact") == 0)
+ strcmp(libbpf_nla_data(tb[TCA_KIND]), "clsact") == 0)
return 0;
if (info->tcm_handle == 0)
return 0;
@@ -101,7 +103,9 @@ static int dump_class_qdisc_nlmsg(void *cookie, void *msg, struct nlattr **tb)
snprintf(tcinfo->handle_array[tcinfo->used_len].kind,
sizeof(tcinfo->handle_array[tcinfo->used_len].kind),
"%s",
- tb[TCA_KIND] ? nla_getattr_str(tb[TCA_KIND]) : "unknown");
+ tb[TCA_KIND]
+ ? libbpf_nla_getattr_str(tb[TCA_KIND])
+ : "unknown");
tcinfo->used_len++;
return 0;
diff --git a/tools/bpf/bpftool/netlink_dumper.c b/tools/bpf/bpftool/netlink_dumper.c
index 6f5e9cc6836c..4e9f4531269f 100644
--- a/tools/bpf/bpftool/netlink_dumper.c
+++ b/tools/bpf/bpftool/netlink_dumper.c
@@ -21,7 +21,7 @@ static void xdp_dump_prog_id(struct nlattr **tb, int attr,
if (new_json_object)
NET_START_OBJECT
NET_DUMP_STR("mode", " %s", mode);
- NET_DUMP_UINT("id", " id %u", nla_getattr_u32(tb[attr]))
+ NET_DUMP_UINT("id", " id %u", libbpf_nla_getattr_u32(tb[attr]))
if (new_json_object)
NET_END_OBJECT
}
@@ -32,13 +32,13 @@ static int do_xdp_dump_one(struct nlattr *attr, unsigned int ifindex,
struct nlattr *tb[IFLA_XDP_MAX + 1];
unsigned char mode;
- if (nla_parse_nested(tb, IFLA_XDP_MAX, attr, NULL) < 0)
+ if (libbpf_nla_parse_nested(tb, IFLA_XDP_MAX, attr, NULL) < 0)
return -1;
if (!tb[IFLA_XDP_ATTACHED])
return 0;
- mode = nla_getattr_u8(tb[IFLA_XDP_ATTACHED]);
+ mode = libbpf_nla_getattr_u8(tb[IFLA_XDP_ATTACHED]);
if (mode == XDP_ATTACHED_NONE)
return 0;
@@ -75,14 +75,14 @@ int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb)
return 0;
return do_xdp_dump_one(tb[IFLA_XDP], ifinfo->ifi_index,
- nla_getattr_str(tb[IFLA_IFNAME]));
+ libbpf_nla_getattr_str(tb[IFLA_IFNAME]));
}
static int do_bpf_dump_one_act(struct nlattr *attr)
{
struct nlattr *tb[TCA_ACT_BPF_MAX + 1];
- if (nla_parse_nested(tb, TCA_ACT_BPF_MAX, attr, NULL) < 0)
+ if (libbpf_nla_parse_nested(tb, TCA_ACT_BPF_MAX, attr, NULL) < 0)
return -LIBBPF_ERRNO__NLPARSE;
if (!tb[TCA_ACT_BPF_PARMS])
@@ -91,10 +91,10 @@ static int do_bpf_dump_one_act(struct nlattr *attr)
NET_START_OBJECT_NESTED2;
if (tb[TCA_ACT_BPF_NAME])
NET_DUMP_STR("name", "%s",
- nla_getattr_str(tb[TCA_ACT_BPF_NAME]));
+ libbpf_nla_getattr_str(tb[TCA_ACT_BPF_NAME]));
if (tb[TCA_ACT_BPF_ID])
NET_DUMP_UINT("id", " id %u",
- nla_getattr_u32(tb[TCA_ACT_BPF_ID]));
+ libbpf_nla_getattr_u32(tb[TCA_ACT_BPF_ID]));
NET_END_OBJECT_NESTED;
return 0;
}
@@ -106,10 +106,11 @@ static int do_dump_one_act(struct nlattr *attr)
if (!attr)
return 0;
- if (nla_parse_nested(tb, TCA_ACT_MAX, attr, NULL) < 0)
+ if (libbpf_nla_parse_nested(tb, TCA_ACT_MAX, attr, NULL) < 0)
return -LIBBPF_ERRNO__NLPARSE;
- if (tb[TCA_ACT_KIND] && strcmp(nla_data(tb[TCA_ACT_KIND]), "bpf") == 0)
+ if (tb[TCA_ACT_KIND] &&
+ strcmp(libbpf_nla_data(tb[TCA_ACT_KIND]), "bpf") == 0)
return do_bpf_dump_one_act(tb[TCA_ACT_OPTIONS]);
return 0;
@@ -120,7 +121,7 @@ static int do_bpf_act_dump(struct nlattr *attr)
struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
int act, ret;
- if (nla_parse_nested(tb, TCA_ACT_MAX_PRIO, attr, NULL) < 0)
+ if (libbpf_nla_parse_nested(tb, TCA_ACT_MAX_PRIO, attr, NULL) < 0)
return -LIBBPF_ERRNO__NLPARSE;
NET_START_ARRAY("act", " %s [");
@@ -139,13 +140,15 @@ static int do_bpf_filter_dump(struct nlattr *attr)
struct nlattr *tb[TCA_BPF_MAX + 1];
int ret;
- if (nla_parse_nested(tb, TCA_BPF_MAX, attr, NULL) < 0)
+ if (libbpf_nla_parse_nested(tb, TCA_BPF_MAX, attr, NULL) < 0)
return -LIBBPF_ERRNO__NLPARSE;
if (tb[TCA_BPF_NAME])
- NET_DUMP_STR("name", " %s", nla_getattr_str(tb[TCA_BPF_NAME]));
+ NET_DUMP_STR("name", " %s",
+ libbpf_nla_getattr_str(tb[TCA_BPF_NAME]));
if (tb[TCA_BPF_ID])
- NET_DUMP_UINT("id", " id %u", nla_getattr_u32(tb[TCA_BPF_ID]));
+ NET_DUMP_UINT("id", " id %u",
+ libbpf_nla_getattr_u32(tb[TCA_BPF_ID]));
if (tb[TCA_BPF_ACT]) {
ret = do_bpf_act_dump(tb[TCA_BPF_ACT]);
if (ret)
@@ -160,7 +163,8 @@ int do_filter_dump(struct tcmsg *info, struct nlattr **tb, const char *kind,
{
int ret = 0;
- if (tb[TCA_OPTIONS] && strcmp(nla_data(tb[TCA_KIND]), "bpf") == 0) {
+ if (tb[TCA_OPTIONS] &&
+ strcmp(libbpf_nla_data(tb[TCA_KIND]), "bpf") == 0) {
NET_START_OBJECT;
if (devname[0] != '\0')
NET_DUMP_STR("devname", "%s", devname);
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c
index 506bdfdbcab0..2d2edbbd8ae8 100644
--- a/tools/lib/bpf/netlink.c
+++ b/tools/lib/bpf/netlink.c
@@ -103,7 +103,7 @@ static int bpf_netlink_recv(int sock, __u32 nl_pid, int seq,
if (!err->error)
continue;
ret = err->error;
- nla_dump_errormsg(nh);
+ libbpf_nla_dump_errormsg(nh);
goto done;
case NLMSG_DONE:
return 0;
@@ -190,7 +190,7 @@ static int __dump_link_nlmsg(struct nlmsghdr *nlh,
len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
attr = (struct nlattr *) ((void *) ifi + NLMSG_ALIGN(sizeof(*ifi)));
- if (nla_parse(tb, IFLA_MAX, attr, len, NULL) != 0)
+ if (libbpf_nla_parse(tb, IFLA_MAX, attr, len, NULL) != 0)
return -LIBBPF_ERRNO__NLPARSE;
return dump_link_nlmsg(cookie, ifi, tb);
@@ -228,7 +228,7 @@ static int __dump_class_nlmsg(struct nlmsghdr *nlh,
len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
- if (nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+ if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
return -LIBBPF_ERRNO__NLPARSE;
return dump_class_nlmsg(cookie, t, tb);
@@ -267,7 +267,7 @@ static int __dump_qdisc_nlmsg(struct nlmsghdr *nlh,
len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
- if (nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+ if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
return -LIBBPF_ERRNO__NLPARSE;
return dump_qdisc_nlmsg(cookie, t, tb);
@@ -306,7 +306,7 @@ static int __dump_filter_nlmsg(struct nlmsghdr *nlh,
len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
- if (nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
+ if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
return -LIBBPF_ERRNO__NLPARSE;
return dump_filter_nlmsg(cookie, t, tb);
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
index 49f514119bdb..e52257a7367a 100644
--- a/tools/lib/bpf/nlattr.c
+++ b/tools/lib/bpf/nlattr.c
@@ -17,13 +17,13 @@
#include <string.h>
#include <stdio.h>
-static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = {
- [NLA_U8] = sizeof(uint8_t),
- [NLA_U16] = sizeof(uint16_t),
- [NLA_U32] = sizeof(uint32_t),
- [NLA_U64] = sizeof(uint64_t),
- [NLA_STRING] = 1,
- [NLA_FLAG] = 0,
+static uint16_t nla_attr_minlen[LIBBPF_NLA_TYPE_MAX+1] = {
+ [LIBBPF_NLA_U8] = sizeof(uint8_t),
+ [LIBBPF_NLA_U16] = sizeof(uint16_t),
+ [LIBBPF_NLA_U32] = sizeof(uint32_t),
+ [LIBBPF_NLA_U64] = sizeof(uint64_t),
+ [LIBBPF_NLA_STRING] = 1,
+ [LIBBPF_NLA_FLAG] = 0,
};
static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
@@ -47,9 +47,9 @@ static int nla_type(const struct nlattr *nla)
}
static int validate_nla(struct nlattr *nla, int maxtype,
- struct nla_policy *policy)
+ struct libbpf_nla_policy *policy)
{
- struct nla_policy *pt;
+ struct libbpf_nla_policy *pt;
unsigned int minlen = 0;
int type = nla_type(nla);
@@ -58,23 +58,24 @@ static int validate_nla(struct nlattr *nla, int maxtype,
pt = &policy[type];
- if (pt->type > NLA_TYPE_MAX)
+ if (pt->type > LIBBPF_NLA_TYPE_MAX)
return 0;
if (pt->minlen)
minlen = pt->minlen;
- else if (pt->type != NLA_UNSPEC)
+ else if (pt->type != LIBBPF_NLA_UNSPEC)
minlen = nla_attr_minlen[pt->type];
- if (nla_len(nla) < minlen)
+ if (libbpf_nla_len(nla) < minlen)
return -1;
- if (pt->maxlen && nla_len(nla) > pt->maxlen)
+ if (pt->maxlen && libbpf_nla_len(nla) > pt->maxlen)
return -1;
- if (pt->type == NLA_STRING) {
- char *data = nla_data(nla);
- if (data[nla_len(nla) - 1] != '\0')
+ if (pt->type == LIBBPF_NLA_STRING) {
+ char *data = libbpf_nla_data(nla);
+
+ if (data[libbpf_nla_len(nla) - 1] != '\0')
return -1;
}
@@ -104,15 +105,15 @@ static inline int nlmsg_len(const struct nlmsghdr *nlh)
* @see nla_validate
* @return 0 on success or a negative error code.
*/
-int nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head, int len,
- struct nla_policy *policy)
+int libbpf_nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head,
+ int len, struct libbpf_nla_policy *policy)
{
struct nlattr *nla;
int rem, err;
memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
- nla_for_each_attr(nla, head, len, rem) {
+ libbpf_nla_for_each_attr(nla, head, len, rem) {
int type = nla_type(nla);
if (type > maxtype)
@@ -144,23 +145,25 @@ errout:
* @arg policy Attribute validation policy.
*
* Feeds the stream of attributes nested into the specified attribute
- * to nla_parse().
+ * to libbpf_nla_parse().
*
- * @see nla_parse
+ * @see libbpf_nla_parse
* @return 0 on success or a negative error code.
*/
-int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla,
- struct nla_policy *policy)
+int libbpf_nla_parse_nested(struct nlattr *tb[], int maxtype,
+ struct nlattr *nla,
+ struct libbpf_nla_policy *policy)
{
- return nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy);
+ return libbpf_nla_parse(tb, maxtype, libbpf_nla_data(nla),
+ libbpf_nla_len(nla), policy);
}
/* dump netlink extended ack error message */
-int nla_dump_errormsg(struct nlmsghdr *nlh)
+int libbpf_nla_dump_errormsg(struct nlmsghdr *nlh)
{
- struct nla_policy extack_policy[NLMSGERR_ATTR_MAX + 1] = {
- [NLMSGERR_ATTR_MSG] = { .type = NLA_STRING },
- [NLMSGERR_ATTR_OFFS] = { .type = NLA_U32 },
+ struct libbpf_nla_policy extack_policy[NLMSGERR_ATTR_MAX + 1] = {
+ [NLMSGERR_ATTR_MSG] = { .type = LIBBPF_NLA_STRING },
+ [NLMSGERR_ATTR_OFFS] = { .type = LIBBPF_NLA_U32 },
};
struct nlattr *tb[NLMSGERR_ATTR_MAX + 1], *attr;
struct nlmsgerr *err;
@@ -181,14 +184,15 @@ int nla_dump_errormsg(struct nlmsghdr *nlh)
attr = (struct nlattr *) ((void *) err + hlen);
alen = nlh->nlmsg_len - hlen;
- if (nla_parse(tb, NLMSGERR_ATTR_MAX, attr, alen, extack_policy) != 0) {
+ if (libbpf_nla_parse(tb, NLMSGERR_ATTR_MAX, attr, alen,
+ extack_policy) != 0) {
fprintf(stderr,
"Failed to parse extended error attributes\n");
return 0;
}
if (tb[NLMSGERR_ATTR_MSG])
- errmsg = (char *) nla_data(tb[NLMSGERR_ATTR_MSG]);
+ errmsg = (char *) libbpf_nla_data(tb[NLMSGERR_ATTR_MSG]);
fprintf(stderr, "Kernel error message: %s\n", errmsg);
diff --git a/tools/lib/bpf/nlattr.h b/tools/lib/bpf/nlattr.h
index a6e2396bce7c..755a3312c87f 100644
--- a/tools/lib/bpf/nlattr.h
+++ b/tools/lib/bpf/nlattr.h
@@ -23,19 +23,19 @@
* Standard attribute types to specify validation policy
*/
enum {
- NLA_UNSPEC, /**< Unspecified type, binary data chunk */
- NLA_U8, /**< 8 bit integer */
- NLA_U16, /**< 16 bit integer */
- NLA_U32, /**< 32 bit integer */
- NLA_U64, /**< 64 bit integer */
- NLA_STRING, /**< NUL terminated character string */
- NLA_FLAG, /**< Flag */
- NLA_MSECS, /**< Micro seconds (64bit) */
- NLA_NESTED, /**< Nested attributes */
- __NLA_TYPE_MAX,
+ LIBBPF_NLA_UNSPEC, /**< Unspecified type, binary data chunk */
+ LIBBPF_NLA_U8, /**< 8 bit integer */
+ LIBBPF_NLA_U16, /**< 16 bit integer */
+ LIBBPF_NLA_U32, /**< 32 bit integer */
+ LIBBPF_NLA_U64, /**< 64 bit integer */
+ LIBBPF_NLA_STRING, /**< NUL terminated character string */
+ LIBBPF_NLA_FLAG, /**< Flag */
+ LIBBPF_NLA_MSECS, /**< Micro seconds (64bit) */
+ LIBBPF_NLA_NESTED, /**< Nested attributes */
+ __LIBBPF_NLA_TYPE_MAX,
};
-#define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1)
+#define LIBBPF_NLA_TYPE_MAX (__LIBBPF_NLA_TYPE_MAX - 1)
/**
* @ingroup attr
@@ -43,8 +43,8 @@ enum {
*
* See section @core_doc{core_attr_parse,Attribute Parsing} for more details.
*/
-struct nla_policy {
- /** Type of attribute or NLA_UNSPEC */
+struct libbpf_nla_policy {
+ /** Type of attribute or LIBBPF_NLA_UNSPEC */
uint16_t type;
/** Minimal length of payload required */
@@ -62,49 +62,50 @@ struct nla_policy {
* @arg len length of attribute stream
* @arg rem initialized to len, holds bytes currently remaining in stream
*/
-#define nla_for_each_attr(pos, head, len, rem) \
+#define libbpf_nla_for_each_attr(pos, head, len, rem) \
for (pos = head, rem = len; \
nla_ok(pos, rem); \
pos = nla_next(pos, &(rem)))
/**
- * nla_data - head of payload
+ * libbpf_nla_data - head of payload
* @nla: netlink attribute
*/
-static inline void *nla_data(const struct nlattr *nla)
+static inline void *libbpf_nla_data(const struct nlattr *nla)
{
return (char *) nla + NLA_HDRLEN;
}
-static inline uint8_t nla_getattr_u8(const struct nlattr *nla)
+static inline uint8_t libbpf_nla_getattr_u8(const struct nlattr *nla)
{
- return *(uint8_t *)nla_data(nla);
+ return *(uint8_t *)libbpf_nla_data(nla);
}
-static inline uint32_t nla_getattr_u32(const struct nlattr *nla)
+static inline uint32_t libbpf_nla_getattr_u32(const struct nlattr *nla)
{
- return *(uint32_t *)nla_data(nla);
+ return *(uint32_t *)libbpf_nla_data(nla);
}
-static inline const char *nla_getattr_str(const struct nlattr *nla)
+static inline const char *libbpf_nla_getattr_str(const struct nlattr *nla)
{
- return (const char *)nla_data(nla);
+ return (const char *)libbpf_nla_data(nla);
}
/**
- * nla_len - length of payload
+ * libbpf_nla_len - length of payload
* @nla: netlink attribute
*/
-static inline int nla_len(const struct nlattr *nla)
+static inline int libbpf_nla_len(const struct nlattr *nla)
{
return nla->nla_len - NLA_HDRLEN;
}
-int nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head, int len,
- struct nla_policy *policy);
-int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla,
- struct nla_policy *policy);
+int libbpf_nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head,
+ int len, struct libbpf_nla_policy *policy);
+int libbpf_nla_parse_nested(struct nlattr *tb[], int maxtype,
+ struct nlattr *nla,
+ struct libbpf_nla_policy *policy);
-int nla_dump_errormsg(struct nlmsghdr *nlh);
+int libbpf_nla_dump_errormsg(struct nlmsghdr *nlh);
#endif /* __NLATTR_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.