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netlink: Remove compat API for nested attributes 

Removes all _nested_compat() functions from the API. The prio qdisc
no longer requires them and netem has its own format anyway. Their
existance is only confusing.

Resend: Also remove the wrapper macro.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2008-09-02 17:30:27 -07:00 committed by David S. Miller
parent b171e19ed0
commit 2c10b32bf5
3 changed files with 17 additions and 89 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
include/net/netlink.h
View File

@ -119,9 +119,6 @@
* Nested Attributes Construction:
* nla_nest_start(skb, type) start a nested attribute
* nla_nest_end(skb, nla) finalize a nested attribute
* nla_nest_compat_start(skb, type, start a nested compat attribute
* len, data)
* nla_nest_compat_end(skb, type) finalize a nested compat attribute
* nla_nest_cancel(skb, nla) cancel nested attribute construction
*
* Attribute Length Calculations:
@ -156,7 +153,6 @@
* nla_find_nested() find attribute in nested attributes
* nla_parse() parse and validate stream of attrs
* nla_parse_nested() parse nested attribuets
* nla_parse_nested_compat() parse nested compat attributes
* nla_for_each_attr() loop over all attributes
* nla_for_each_nested() loop over the nested attributes
*=========================================================================
@ -751,39 +747,6 @@ static inline int nla_parse_nested(struct nlattr *tb[], int maxtype,
return nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy);
}
/**
* nla_parse_nested_compat - parse nested compat attributes
* @tb: destination array with maxtype+1 elements
* @maxtype: maximum attribute type to be expected
* @nla: attribute containing the nested attributes
* @data: pointer to point to contained structure
* @len: length of contained structure
* @policy: validation policy
*
* Parse a nested compat attribute. The compat attribute contains a structure
* and optionally a set of nested attributes. On success the data pointer
* points to the nested data and tb contains the parsed attributes
* (see nla_parse).
*/
static inline int __nla_parse_nested_compat(struct nlattr *tb[], int maxtype,
struct nlattr *nla,
const struct nla_policy *policy,
int len)
{
int nested_len = nla_len(nla) - NLA_ALIGN(len);
if (nested_len < 0)
return -EINVAL;
if (nested_len >= nla_attr_size(0))
return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
nested_len, policy);
memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
return 0;
}
#define nla_parse_nested_compat(tb, maxtype, nla, policy, data, len) \
({ data = nla_len(nla) >= len ? nla_data(nla) : NULL; \
__nla_parse_nested_compat(tb, maxtype, nla, policy, len); })
/**
* nla_put_u8 - Add a u8 netlink attribute to a socket buffer
* @skb: socket buffer to add attribute to
@ -1030,51 +993,6 @@ static inline int nla_nest_end(struct sk_buff *skb, struct nlattr *start)
return skb->len;
}
/**
* nla_nest_compat_start - Start a new level of nested compat attributes
* @skb: socket buffer to add attributes to
* @attrtype: attribute type of container
* @attrlen: length of structure
* @data: pointer to structure
*
* Start a nested compat attribute that contains both a structure and
* a set of nested attributes.
*
* Returns the container attribute
*/
static inline struct nlattr *nla_nest_compat_start(struct sk_buff *skb,
int attrtype, int attrlen,
const void *data)
{
struct nlattr *start = (struct nlattr *)skb_tail_pointer(skb);
if (nla_put(skb, attrtype, attrlen, data) < 0)
return NULL;
if (nla_nest_start(skb, attrtype) == NULL) {
nlmsg_trim(skb, start);
return NULL;
}
return start;
}
/**
* nla_nest_compat_end - Finalize nesting of compat attributes
* @skb: socket buffer the attributes are stored in
* @start: container attribute
*
* Corrects the container attribute header to include the all
* appeneded attributes.
*
* Returns the total data length of the skb.
*/
static inline int nla_nest_compat_end(struct sk_buff *skb, struct nlattr *start)
{
struct nlattr *nest = (void *)start + NLMSG_ALIGN(start->nla_len);
start->nla_len = skb_tail_pointer(skb) - (unsigned char *)start;
return nla_nest_end(skb, nest);
}
/**
* nla_nest_cancel - Cancel nesting of attributes
* @skb: socket buffer the message is stored in

18
net/sched/sch_netem.c
View File

@ -388,6 +388,20 @@ static const struct nla_policy netem_policy[TCA_NETEM_MAX + 1] = {
[TCA_NETEM_CORRUPT] = { .len = sizeof(struct tc_netem_corrupt) },
};
static int parse_attr(struct nlattr *tb[], int maxtype, struct nlattr *nla,
const struct nla_policy *policy, int len)
{
int nested_len = nla_len(nla) - NLA_ALIGN(len);
if (nested_len < 0)
return -EINVAL;
if (nested_len >= nla_attr_size(0))
return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
nested_len, policy);
memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
return 0;
}
/* Parse netlink message to set options */
static int netem_change(struct Qdisc *sch, struct nlattr *opt)
{
@ -399,8 +413,8 @@ static int netem_change(struct Qdisc *sch, struct nlattr *opt)
if (opt == NULL)
return -EINVAL;
ret = nla_parse_nested_compat(tb, TCA_NETEM_MAX, opt, netem_policy,
qopt, sizeof(*qopt));
qopt = nla_data(opt);
ret = parse_attr(tb, TCA_NETEM_MAX, opt, netem_policy, sizeof(*qopt));
if (ret < 0)
return ret;

6
net/sched/sch_prio.c
View File

@ -254,16 +254,12 @@ static int prio_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct prio_sched_data *q = qdisc_priv(sch);
unsigned char *b = skb_tail_pointer(skb);
struct nlattr *nest;
struct tc_prio_qopt opt;
opt.bands = q->bands;
memcpy(&opt.priomap, q->prio2band, TC_PRIO_MAX+1);
nest = nla_nest_compat_start(skb, TCA_OPTIONS, sizeof(opt), &opt);
if (nest == NULL)
goto nla_put_failure;
nla_nest_compat_end(skb, nest);
NLA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt);
return skb->len;