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[EBTABLES]: Split ebt_replace into user and kernel variants, annotate. 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro 2006-11-30 19:28:48 -08:00 committed by David S. Miller
parent df07a81e93
commit 1e419cd995
5 changed files with 31 additions and 13 deletions
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19
include/linux/netfilter_bridge/ebtables.h
View File

@ -38,6 +38,23 @@ struct ebt_counter
};
struct ebt_replace
{
char name[EBT_TABLE_MAXNAMELEN];
unsigned int valid_hooks;
/* nr of rules in the table */
unsigned int nentries;
/* total size of the entries */
unsigned int entries_size;
/* start of the chains */
struct ebt_entries __user *hook_entry[NF_BR_NUMHOOKS];
/* nr of counters userspace expects back */
unsigned int num_counters;
/* where the kernel will put the old counters */
struct ebt_counter __user *counters;
char __user *entries;
};
struct ebt_replace_kernel
{
char name[EBT_TABLE_MAXNAMELEN];
unsigned int valid_hooks;
@ -255,7 +272,7 @@ struct ebt_table
{
struct list_head list;
char name[EBT_TABLE_MAXNAMELEN];
struct ebt_replace *table;
struct ebt_replace_kernel *table;
unsigned int valid_hooks;
rwlock_t lock;
/* e.g. could be the table explicitly only allows certain

2
net/bridge/netfilter/ebtable_broute.c
View File

@ -23,7 +23,7 @@ static struct ebt_entries initial_chain = {
.policy = EBT_ACCEPT,
};
static struct ebt_replace initial_table =
static struct ebt_replace_kernel initial_table =
{
.name = "broute",
.valid_hooks = 1 << NF_BR_BROUTING,

2
net/bridge/netfilter/ebtable_filter.c
View File

@ -30,7 +30,7 @@ static struct ebt_entries initial_chains[] =
},
};
static struct ebt_replace initial_table =
static struct ebt_replace_kernel initial_table =
{
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,

2
net/bridge/netfilter/ebtable_nat.c
View File

@ -30,7 +30,7 @@ static struct ebt_entries initial_chains[] =
}
};
static struct ebt_replace initial_table =
static struct ebt_replace_kernel initial_table =
{
.name = "nat",
.valid_hooks = NAT_VALID_HOOKS,

19
net/bridge/netfilter/ebtables.c
View File

@ -417,7 +417,8 @@ static int ebt_verify_pointers(struct ebt_replace *repl,
for (i = 0; i < NF_BR_NUMHOOKS; i++) {
if ((valid_hooks & (1 << i)) == 0)
continue;
if ((char *)repl->hook_entry[i] == repl->entries + offset)
if ((char __user *)repl->hook_entry[i] ==
repl->entries + offset)
break;
}
@ -1156,7 +1157,7 @@ int ebt_register_table(struct ebt_table *table)
{
struct ebt_table_info *newinfo;
struct ebt_table *t;
struct ebt_replace *repl;
struct ebt_replace_kernel *repl;
int ret, i, countersize;
void *p;
@ -1320,33 +1321,33 @@ static int update_counters(void __user *user, unsigned int len)
}
static inline int ebt_make_matchname(struct ebt_entry_match *m,
char *base, char *ubase)
char *base, char __user *ubase)
{
char *hlp = ubase - base + (char *)m;
char __user *hlp = ubase + ((char *)m - base);
if (copy_to_user(hlp, m->u.match->name, EBT_FUNCTION_MAXNAMELEN))
return -EFAULT;
return 0;
}
static inline int ebt_make_watchername(struct ebt_entry_watcher *w,
char *base, char *ubase)
char *base, char __user *ubase)
{
char *hlp = ubase - base + (char *)w;
char __user *hlp = ubase + ((char *)w - base);
if (copy_to_user(hlp , w->u.watcher->name, EBT_FUNCTION_MAXNAMELEN))
return -EFAULT;
return 0;
}
static inline int ebt_make_names(struct ebt_entry *e, char *base, char *ubase)
static inline int ebt_make_names(struct ebt_entry *e, char *base, char __user *ubase)
{
int ret;
char *hlp;
char __user *hlp;
struct ebt_entry_target *t;
if (e->bitmask == 0)
return 0;
hlp = ubase - base + (char *)e + e->target_offset;
hlp = ubase + (((char *)e + e->target_offset) - base);
t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
ret = EBT_MATCH_ITERATE(e, ebt_make_matchname, base, ubase);