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author | Jan Engelhardt <jengelh@medozas.de> | 2010-03-19 17:32:59 +0100 |
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committer | Jan Engelhardt <jengelh@medozas.de> | 2010-03-25 16:56:09 +0100 |
commit | 4a5a5c73b7cfee46a0b1411903cfa0dea532deec (patch) | |
tree | 3f7ef0def4adf3a01e15ab3a2a7231967b87bfee /net/netfilter/xt_hashlimit.c | |
parent | d6b00a5345ce4e86e8b00a88bb84a2c0c1f69ddc (diff) | |
download | linux-stable-4a5a5c73b7cfee46a0b1411903cfa0dea532deec.tar.gz linux-stable-4a5a5c73b7cfee46a0b1411903cfa0dea532deec.tar.bz2 linux-stable-4a5a5c73b7cfee46a0b1411903cfa0dea532deec.zip |
netfilter: xtables: slightly better error reporting
When extended status codes are available, such as ENOMEM on failed
allocations, or subsequent functions (e.g. nf_ct_get_l3proto), passing
them up to userspace seems like a good idea compared to just always
EINVAL.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Diffstat (limited to 'net/netfilter/xt_hashlimit.c')
-rw-r--r-- | net/netfilter/xt_hashlimit.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 0c0152902b3b..c89fde7d1234 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -214,7 +214,7 @@ static int htable_create_v0(struct net *net, struct xt_hashlimit_info *minfo, u_ hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) + sizeof(struct list_head) * size); if (!hinfo) - return -1; + return -ENOMEM; minfo->hinfo = hinfo; /* copy match config into hashtable config */ @@ -250,7 +250,7 @@ static int htable_create_v0(struct net *net, struct xt_hashlimit_info *minfo, u_ &dl_file_ops, hinfo); if (!hinfo->pde) { vfree(hinfo); - return -1; + return -ENOMEM; } hinfo->net = net; @@ -285,7 +285,7 @@ static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo, hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) + sizeof(struct list_head) * size); if (hinfo == NULL) - return -1; + return -ENOMEM; minfo->hinfo = hinfo; /* copy match config into hashtable config */ @@ -311,7 +311,7 @@ static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo, &dl_file_ops, hinfo); if (hinfo->pde == NULL) { vfree(hinfo); - return -1; + return -ENOMEM; } hinfo->net = net; @@ -675,13 +675,14 @@ static int hashlimit_mt_check_v0(const struct xt_mtchk_param *par) { struct net *net = par->net; struct xt_hashlimit_info *r = par->matchinfo; + int ret; /* Check for overflow. */ if (r->cfg.burst == 0 || user2credits(r->cfg.avg * r->cfg.burst) < user2credits(r->cfg.avg)) { pr_info("overflow, try lower: %u/%u\n", r->cfg.avg, r->cfg.burst); - return -EINVAL; + return -ERANGE; } if (r->cfg.mode == 0 || r->cfg.mode > (XT_HASHLIMIT_HASH_DPT | @@ -698,9 +699,12 @@ static int hashlimit_mt_check_v0(const struct xt_mtchk_param *par) mutex_lock(&hashlimit_mutex); r->hinfo = htable_find_get(net, r->name, par->family); - if (!r->hinfo && htable_create_v0(net, r, par->family) != 0) { - mutex_unlock(&hashlimit_mutex); - return -EINVAL; + if (r->hinfo == NULL) { + ret = htable_create_v0(net, r, par->family); + if (ret < 0) { + mutex_unlock(&hashlimit_mutex); + return ret; + } } mutex_unlock(&hashlimit_mutex); return 0; @@ -710,6 +714,7 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par) { struct net *net = par->net; struct xt_hashlimit_mtinfo1 *info = par->matchinfo; + int ret; /* Check for overflow. */ if (info->cfg.burst == 0 || @@ -717,7 +722,7 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par) user2credits(info->cfg.avg)) { pr_info("overflow, try lower: %u/%u\n", info->cfg.avg, info->cfg.burst); - return -EINVAL; + return -ERANGE; } if (info->cfg.gc_interval == 0 || info->cfg.expire == 0) return -EINVAL; @@ -733,9 +738,12 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par) mutex_lock(&hashlimit_mutex); info->hinfo = htable_find_get(net, info->name, par->family); - if (!info->hinfo && htable_create(net, info, par->family) != 0) { - mutex_unlock(&hashlimit_mutex); - return -EINVAL; + if (info->hinfo == NULL) { + ret = htable_create(net, info, par->family); + if (ret < 0) { + mutex_unlock(&hashlimit_mutex); + return ret; + } } mutex_unlock(&hashlimit_mutex); return 0; |