diff options
author | Dmitry Torokhov <dtor_core@ameritech.net> | 2006-04-29 01:11:23 -0400 |
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committer | Dmitry Torokhov <dtor_core@ameritech.net> | 2006-04-29 01:11:23 -0400 |
commit | 7b7e394185014e0f3bd8989cac937003f20ef9ce (patch) | |
tree | 3beda5f979bba0aa9822534e239cf1b45f3be69c /net/netfilter/x_tables.c | |
parent | ddc5d3414593e4d7ad7fbd33e7f7517fcc234544 (diff) | |
parent | 693f7d362055261882659475d2ef022e32edbff1 (diff) |
Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'net/netfilter/x_tables.c')
-rw-r--r-- | net/netfilter/x_tables.c | 119 |
1 files changed, 116 insertions, 3 deletions
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index a657ab5394c..17abf60f957 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -38,6 +38,7 @@ struct xt_af { struct list_head match; struct list_head target; struct list_head tables; + struct mutex compat_mutex; }; static struct xt_af *xt; @@ -272,6 +273,54 @@ int xt_check_match(const struct xt_match *match, unsigned short family, } EXPORT_SYMBOL_GPL(xt_check_match); +#ifdef CONFIG_COMPAT +int xt_compat_match(void *match, void **dstptr, int *size, int convert) +{ + struct xt_match *m; + struct compat_xt_entry_match *pcompat_m; + struct xt_entry_match *pm; + u_int16_t msize; + int off, ret; + + ret = 0; + m = ((struct xt_entry_match *)match)->u.kernel.match; + off = XT_ALIGN(m->matchsize) - COMPAT_XT_ALIGN(m->matchsize); + switch (convert) { + case COMPAT_TO_USER: + pm = (struct xt_entry_match *)match; + msize = pm->u.user.match_size; + if (__copy_to_user(*dstptr, pm, msize)) { + ret = -EFAULT; + break; + } + msize -= off; + if (put_user(msize, (u_int16_t *)*dstptr)) + ret = -EFAULT; + *size -= off; + *dstptr += msize; + break; + case COMPAT_FROM_USER: + pcompat_m = (struct compat_xt_entry_match *)match; + pm = (struct xt_entry_match *)*dstptr; + msize = pcompat_m->u.user.match_size; + memcpy(pm, pcompat_m, msize); + msize += off; + pm->u.user.match_size = msize; + *size += off; + *dstptr += msize; + break; + case COMPAT_CALC_SIZE: + *size += off; + break; + default: + ret = -ENOPROTOOPT; + break; + } + return ret; +} +EXPORT_SYMBOL_GPL(xt_compat_match); +#endif + int xt_check_target(const struct xt_target *target, unsigned short family, unsigned int size, const char *table, unsigned int hook_mask, unsigned short proto, int inv_proto) @@ -301,6 +350,54 @@ int xt_check_target(const struct xt_target *target, unsigned short family, } EXPORT_SYMBOL_GPL(xt_check_target); +#ifdef CONFIG_COMPAT +int xt_compat_target(void *target, void **dstptr, int *size, int convert) +{ + struct xt_target *t; + struct compat_xt_entry_target *pcompat; + struct xt_entry_target *pt; + u_int16_t tsize; + int off, ret; + + ret = 0; + t = ((struct xt_entry_target *)target)->u.kernel.target; + off = XT_ALIGN(t->targetsize) - COMPAT_XT_ALIGN(t->targetsize); + switch (convert) { + case COMPAT_TO_USER: + pt = (struct xt_entry_target *)target; + tsize = pt->u.user.target_size; + if (__copy_to_user(*dstptr, pt, tsize)) { + ret = -EFAULT; + break; + } + tsize -= off; + if (put_user(tsize, (u_int16_t *)*dstptr)) + ret = -EFAULT; + *size -= off; + *dstptr += tsize; + break; + case COMPAT_FROM_USER: + pcompat = (struct compat_xt_entry_target *)target; + pt = (struct xt_entry_target *)*dstptr; + tsize = pcompat->u.user.target_size; + memcpy(pt, pcompat, tsize); + tsize += off; + pt->u.user.target_size = tsize; + *size += off; + *dstptr += tsize; + break; + case COMPAT_CALC_SIZE: + *size += off; + break; + default: + ret = -ENOPROTOOPT; + break; + } + return ret; +} +EXPORT_SYMBOL_GPL(xt_compat_target); +#endif + struct xt_table_info *xt_alloc_table_info(unsigned int size) { struct xt_table_info *newinfo; @@ -316,7 +413,7 @@ struct xt_table_info *xt_alloc_table_info(unsigned int size) newinfo->size = size; - for_each_cpu(cpu) { + for_each_possible_cpu(cpu) { if (size <= PAGE_SIZE) newinfo->entries[cpu] = kmalloc_node(size, GFP_KERNEL, @@ -339,7 +436,7 @@ void xt_free_table_info(struct xt_table_info *info) { int cpu; - for_each_cpu(cpu) { + for_each_possible_cpu(cpu) { if (info->size <= PAGE_SIZE) kfree(info->entries[cpu]); else @@ -371,6 +468,19 @@ void xt_table_unlock(struct xt_table *table) } EXPORT_SYMBOL_GPL(xt_table_unlock); +#ifdef CONFIG_COMPAT +void xt_compat_lock(int af) +{ + mutex_lock(&xt[af].compat_mutex); +} +EXPORT_SYMBOL_GPL(xt_compat_lock); + +void xt_compat_unlock(int af) +{ + mutex_unlock(&xt[af].compat_mutex); +} +EXPORT_SYMBOL_GPL(xt_compat_unlock); +#endif struct xt_table_info * xt_replace_table(struct xt_table *table, @@ -419,6 +529,7 @@ int xt_register_table(struct xt_table *table, /* Simplifies replace_table code. */ table->private = bootstrap; + rwlock_init(&table->lock); if (!xt_replace_table(table, 0, newinfo, &ret)) goto unlock; @@ -428,7 +539,6 @@ int xt_register_table(struct xt_table *table, /* save number of initial entries */ private->initial_entries = private->number; - rwlock_init(&table->lock); list_prepend(&xt[table->af].tables, table); ret = 0; @@ -671,6 +781,9 @@ static int __init xt_init(void) for (i = 0; i < NPROTO; i++) { mutex_init(&xt[i].mutex); +#ifdef CONFIG_COMPAT + mutex_init(&xt[i].compat_mutex); +#endif INIT_LIST_HEAD(&xt[i].target); INIT_LIST_HEAD(&xt[i].match); INIT_LIST_HEAD(&xt[i].tables); |