From patchwork Tue Nov 19 01:07:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Brivio X-Patchwork-Id: 1197071 X-Patchwork-Delegate: pablo@netfilter.org Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netfilter-devel-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="XNpBY9DX"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47H7302yrPz9s7T for ; Tue, 19 Nov 2019 12:07:24 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727176AbfKSBHY (ORCPT ); Mon, 18 Nov 2019 20:07:24 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:25738 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726962AbfKSBHX (ORCPT ); Mon, 18 Nov 2019 20:07:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574125642; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DYV/X/nXe/IjcC12BLBhsxesMbdyPh7PPC9gM5FCbJY=; b=XNpBY9DXeelhCDCsNXUtz0Rfe5MVBmd0pQw0lhbJPDBuhBqM3eDHnEkcXAb9GcZiQlAepy vs+kC2JytlfzL12Tne8AAdmj9oOnEC6EvUocWUUDZy9dq7faG+vXr2m6OTrTbAbOUuY7EM EHReSqrvAZ4kfrTvc0GCPyfWdPkH3Tk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-187-R69sX_d_OTKJjoKckPkerA-1; Mon, 18 Nov 2019 20:07:19 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DAA061005500; Tue, 19 Nov 2019 01:07:17 +0000 (UTC) Received: from epycfail.redhat.com (ovpn-112-24.ams2.redhat.com [10.36.112.24]) by smtp.corp.redhat.com (Postfix) with ESMTP id CD748BA45; Tue, 19 Nov 2019 01:07:15 +0000 (UTC) From: Stefano Brivio To: Pablo Neira Ayuso , netfilter-devel@vger.kernel.org Cc: Florian Westphal , =?utf-8?q?Kadlecsik_J=C3=B3zsef?= , Eric Garver , Phil Sutter Subject: [PATCH nft 1/3] src: Add support for and export NFT_SET_SUBKEY attributes Date: Tue, 19 Nov 2019 02:07:10 +0100 Message-Id: <20191119010712.39316-2-sbrivio@redhat.com> In-Reply-To: <20191119010712.39316-1-sbrivio@redhat.com> References: <20191119010712.39316-1-sbrivio@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: R69sX_d_OTKJjoKckPkerA-1 X-Mimecast-Spam-Score: 0 Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org To support arbitrary range concatenations, the kernel needs to know how long each field in the concatenation is. While evaluating concatenated expressions, export the datatype size, in bits, into the new subkey_len array, and hand the data over via libnftnl. Note that, while the subkey length is expressed in bits, and the kernel attribute is 32-bit long to make UAPI more future-proof, we just reserve 8 bits for it, at the moment, and still store this data in bits. As we don't have subkeys exceeding 128 bits in length, this should be fine, at least for a while, but it can be easily changed later on to use the full 32 bits allowed by the netlink attribute. This change depends on the UAPI kernel patch with title: netfilter: nf_tables: Support for subkeys, set with multiple ranged fields Signed-off-by: Stefano Brivio --- include/expression.h | 1 + include/rule.h | 1 + src/evaluate.c | 12 ++++++++---- src/mnl.c | 4 ++++ 4 files changed, 14 insertions(+), 4 deletions(-) diff --git a/include/expression.h b/include/expression.h index 717b6755..b6d5adb2 100644 --- a/include/expression.h +++ b/include/expression.h @@ -256,6 +256,7 @@ struct expr { struct list_head expressions; unsigned int size; uint32_t set_flags; + uint8_t subkey_len[NFT_REG32_COUNT]; }; struct { /* EXPR_SET_REF */ diff --git a/include/rule.h b/include/rule.h index 0b2eba37..a263947d 100644 --- a/include/rule.h +++ b/include/rule.h @@ -308,6 +308,7 @@ struct set { struct expr *rg_cache; uint32_t policy; bool automerge; + uint8_t subkey_len[NFT_REG32_COUNT]; struct { uint32_t size; } desc; diff --git a/src/evaluate.c b/src/evaluate.c index e54eaf1a..e1ecf4de 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -1211,7 +1211,7 @@ static int expr_evaluate_concat(struct eval_ctx *ctx, struct expr **expr, { const struct datatype *dtype = ctx->ectx.dtype, *tmp; uint32_t type = dtype ? dtype->type : 0, ntype = 0; - int off = dtype ? dtype->subtypes : 0; + int off = dtype ? dtype->subtypes : 0, subkey_idx = 0; unsigned int flags = EXPR_F_CONSTANT | EXPR_F_SINGLETON; struct expr *i, *next; @@ -1240,6 +1240,8 @@ static int expr_evaluate_concat(struct eval_ctx *ctx, struct expr **expr, i->dtype->name); ntype = concat_subtype_add(ntype, i->dtype->type); + + (*expr)->subkey_len[subkey_idx++] = i->dtype->size; } (*expr)->flags |= flags; @@ -3301,9 +3303,11 @@ static int set_evaluate(struct eval_ctx *ctx, struct set *set) "specified in %s definition", set->key->dtype->name, type); } - if (set->flags & NFT_SET_INTERVAL && - set->key->etype == EXPR_CONCAT) - return set_error(ctx, set, "concatenated types not supported in interval sets"); + if (set->flags & NFT_SET_INTERVAL && set->key->etype == EXPR_CONCAT) { + memcpy(&set->subkey_len, &set->key->subkey_len, + sizeof(set->subkey_len)); + set->flags |= NFT_SET_SUBKEY; + } if (set_is_datamap(set->flags)) { if (set->datatype == NULL) diff --git a/src/mnl.c b/src/mnl.c index fdba0af8..292a26fd 100644 --- a/src/mnl.c +++ b/src/mnl.c @@ -880,6 +880,10 @@ int mnl_nft_set_add(struct netlink_ctx *ctx, const struct cmd *cmd, set->automerge)) memory_allocation_error(); + if (set->flags & NFT_SET_SUBKEY) + nftnl_set_set_data(nls, NFTNL_SET_SUBKEY, &set->subkey_len, + sizeof(set->subkey_len)); + nftnl_set_set_data(nls, NFTNL_SET_USERDATA, nftnl_udata_buf_data(udbuf), nftnl_udata_buf_len(udbuf)); nftnl_udata_buf_free(udbuf); From patchwork Tue Nov 19 01:07:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Brivio X-Patchwork-Id: 1197072 X-Patchwork-Delegate: pablo@netfilter.org Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netfilter-devel-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="N4k5/cCS"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47H7333DLVz9s7T for ; Tue, 19 Nov 2019 12:07:27 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727191AbfKSBH1 (ORCPT ); Mon, 18 Nov 2019 20:07:27 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:34728 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726962AbfKSBH0 (ORCPT ); Mon, 18 Nov 2019 20:07:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574125644; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qF4w1mL4O5ZA8Ridr5ugaiulSTEulOZtpnG0wP59aPQ=; b=N4k5/cCSGNkC1Aw8W/u9se+WISedZdDd0dPlneZOPxLtrJtnpT3cplheK97Si2hDSWW3np oFX0XFjZQr4vs5udI462twAHvaXtI5a/J46OIgsmF4/Ds7ovvJvqTRjbmXtVohv4awFOOr mKV1rjRmO+E0lnXudSRXJoiR2sFdoeo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-340-9lMo6gzGPiGcwDB14ckOeg-1; Mon, 18 Nov 2019 20:07:21 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 996AD64A7E; Tue, 19 Nov 2019 01:07:20 +0000 (UTC) Received: from epycfail.redhat.com (ovpn-112-24.ams2.redhat.com [10.36.112.24]) by smtp.corp.redhat.com (Postfix) with ESMTP id 55953BA45; Tue, 19 Nov 2019 01:07:18 +0000 (UTC) From: Stefano Brivio To: Pablo Neira Ayuso , netfilter-devel@vger.kernel.org Cc: Florian Westphal , =?utf-8?q?Kadlecsik_J=C3=B3zsef?= , Eric Garver , Phil Sutter Subject: [PATCH nft 2/3] src: Add support for concatenated set ranges Date: Tue, 19 Nov 2019 02:07:11 +0100 Message-Id: <20191119010712.39316-3-sbrivio@redhat.com> In-Reply-To: <20191119010712.39316-1-sbrivio@redhat.com> References: <20191119010712.39316-1-sbrivio@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: 9lMo6gzGPiGcwDB14ckOeg-1 X-Mimecast-Spam-Score: 0 Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org After exporting subkey (field) lengths via netlink attributes, we now need to adjust parsing of user input and generation of netlink key data to complete support for concatenation of set ranges. The expression of concatenated ranges is described in the kernel counterpart for this change, quoted here: --- In order to specify the interval for a set entry, userspace would simply keep using two elements per entry, as it happens now, with the end element indicating the upper interval bound. As a single element can now be a concatenation of several fields, with or without the NFT_SET_ELEM_INTERVAL_END flag, we obtain a convenient way to support multiple ranged fields in a set. [...] For example, "packets with an IPv4 address between 192.0.2.0 and 192.0.2.42, with destination port between 22 and 25", can be expressed as two concatenated elements: 192.0.2.0 . 22 192.0.2.42 . 25 with NFT_SET_ELEM_INTERVAL_END and the NFTA_SET_SUBKEY attributes would be 32, 16, in that order. Note that this does *not* represent the concatenated range: 0xc0 0x00 0x02 0x00 0x00 0x16 - 0xc0 0x00 0x02 0x2a 0x00 0x25 on the six packet bytes of interest. That is, the range specified does *not* include e.g. 0xc0 0x00 0x02 0x29 0x00 0x42, which is: 192.0.0.41 . 66 -- To achieve this, we need to: - adjust the lexer rules to allow multiton expressions as elements of a concatenation. As wildcards are not allowed (semantics would be ambiguous), exclude wildcards expressions from the set of possible multiton expressions, and allow them directly where needed. Concatenations now admit prefixes and ranges - generate, for each concatenated range, two elements: one containing the start expressions, and one containing the end expressions for all fields in the concatenation - also expand prefixes and non-ranged values in the concatenation to ranges: given a set with interval and subkey support, the kernel has no way to tell which elements are ranged, so they all need to be. So, for example, 192.0.2.0 . 192.0.2.9 : 1024 is sent as the two elements: 192.0.2.0 : 1024 192.0.2.9 : 1024 [end] - aggregate ranges when elements for NFT_SET_SUBKEY sets are received by the kernel, see concat_range_aggregate() - perform a few minor adjustments where interval expressions are already handled: we have intervals in these sets, but the set specification isn't just an interval, so we can't just aggregate and deaggregate interval ranges linearly Signed-off-by: Stefano Brivio --- include/expression.h | 3 + include/netlink.h | 2 +- src/evaluate.c | 13 +++- src/netlink.c | 95 +++++++++++++++++++++------- src/netlink_linearize.c | 16 ++--- src/parser_bison.y | 25 ++++++-- src/rule.c | 10 +-- src/segtree.c | 134 ++++++++++++++++++++++++++++++++++++++++ 8 files changed, 256 insertions(+), 42 deletions(-) diff --git a/include/expression.h b/include/expression.h index b6d5adb2..61596c2e 100644 --- a/include/expression.h +++ b/include/expression.h @@ -459,10 +459,13 @@ extern int set_to_intervals(struct list_head *msgs, struct set *set, struct expr *init, bool add, unsigned int debug_mask, bool merge, struct output_ctx *octx); +extern void concat_range_aggregate(struct expr *set); extern void interval_map_decompose(struct expr *set); extern struct expr *get_set_intervals(const struct set *set, const struct expr *init); +static void set_elem_add(const struct set *set, struct expr *init, mpz_t value, + uint32_t flags); struct table; extern int get_set_decompose(struct table *table, struct set *set); diff --git a/include/netlink.h b/include/netlink.h index e6941714..ad9e0d2a 100644 --- a/include/netlink.h +++ b/include/netlink.h @@ -93,7 +93,7 @@ static inline unsigned int netlink_padding_len(unsigned int size) } extern void netlink_gen_data(const struct expr *expr, - struct nft_data_linearize *data); + struct nft_data_linearize *data, int is_range_end); extern void netlink_gen_raw_data(const mpz_t value, enum byteorder byteorder, unsigned int len, struct nft_data_linearize *data); diff --git a/src/evaluate.c b/src/evaluate.c index e1ecf4de..8cbb0cbe 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -136,6 +136,11 @@ static int byteorder_conversion(struct eval_ctx *ctx, struct expr **expr, if ((*expr)->byteorder == byteorder) return 0; + + /* Conversion for EXPR_CONCAT is handled for single composing ranges */ + if ((*expr)->etype == EXPR_CONCAT) + return 0; + if (expr_basetype(*expr)->type != TYPE_INTEGER) return expr_error(ctx->msgs, *expr, "Byteorder mismatch: expected %s, got %s", @@ -1352,10 +1357,16 @@ static int expr_evaluate_set(struct eval_ctx *ctx, struct expr **expr) set->size += i->size - 1; set->set_flags |= i->set_flags; expr_free(i); - } else if (!expr_is_singleton(i)) + } else if (!expr_is_singleton(i)) { set->set_flags |= NFT_SET_INTERVAL; + if (i->key->etype == EXPR_CONCAT) + set->set_flags |= NFT_SET_SUBKEY; + } } + if (ctx->set->flags & (NFT_SET_SUBKEY)) + set->set_flags |= NFT_SET_SUBKEY; + set->set_flags |= NFT_SET_CONSTANT; datatype_set(set, ctx->ectx.dtype); diff --git a/src/netlink.c b/src/netlink.c index 7306e358..b8bfd199 100644 --- a/src/netlink.c +++ b/src/netlink.c @@ -96,7 +96,8 @@ struct nftnl_expr *alloc_nft_expr(const char *name) } static struct nftnl_set_elem *alloc_nftnl_setelem(const struct expr *set, - const struct expr *expr) + const struct expr *expr, + int is_range_end) { const struct expr *elem, *key, *data; struct nftnl_set_elem *nlse; @@ -117,7 +118,7 @@ static struct nftnl_set_elem *alloc_nftnl_setelem(const struct expr *set, } key = elem->key; - netlink_gen_data(key, &nld); + netlink_gen_data(key, &nld, is_range_end); nftnl_set_elem_set(nlse, NFTNL_SET_ELEM_KEY, &nld.value, nld.len); if (elem->timeout) nftnl_set_elem_set_u64(nlse, NFTNL_SET_ELEM_TIMEOUT, @@ -147,7 +148,7 @@ static struct nftnl_set_elem *alloc_nftnl_setelem(const struct expr *set, nftnl_udata_buf_free(udbuf); } if (set_is_datamap(set->set_flags) && data != NULL) { - netlink_gen_data(data, &nld); + netlink_gen_data(data, &nld, 0); switch (data->etype) { case EXPR_VERDICT: nftnl_set_elem_set_u32(nlse, NFTNL_SET_ELEM_VERDICT, @@ -166,12 +167,12 @@ static struct nftnl_set_elem *alloc_nftnl_setelem(const struct expr *set, } } if (set_is_objmap(set->set_flags) && data != NULL) { - netlink_gen_data(data, &nld); + netlink_gen_data(data, &nld, 0); nftnl_set_elem_set(nlse, NFTNL_SET_ELEM_OBJREF, nld.value, nld.len); } - if (expr->flags & EXPR_F_INTERVAL_END) + if (is_range_end || expr->flags & EXPR_F_INTERVAL_END) nftnl_set_elem_set_u32(nlse, NFTNL_SET_ELEM_FLAGS, NFT_SET_ELEM_INTERVAL_END); @@ -186,8 +187,18 @@ void netlink_gen_raw_data(const mpz_t value, enum byteorder byteorder, data->len = len; } +static int netlink_export_pad(unsigned char *data, const mpz_t v, + const struct expr *i) +{ + mpz_export_data(data, v, i->byteorder, + div_round_up(i->len, BITS_PER_BYTE)); + + return netlink_padded_len(i->len) / BITS_PER_BYTE; +} + static void netlink_gen_concat_data(const struct expr *expr, - struct nft_data_linearize *nld) + struct nft_data_linearize *nld, + int is_range_end) { const struct expr *i; unsigned int len, offset; @@ -199,10 +210,39 @@ static void netlink_gen_concat_data(const struct expr *expr, memset(data, 0, sizeof(data)); offset = 0; list_for_each_entry(i, &expr->expressions, list) { - assert(i->etype == EXPR_VALUE); - mpz_export_data(data + offset, i->value, i->byteorder, - div_round_up(i->len, BITS_PER_BYTE)); - offset += netlink_padded_len(i->len) / BITS_PER_BYTE; + if (i->etype == EXPR_RANGE) { + const struct expr *e; + + if (is_range_end) + e = i->right; + else + e = i->left; + + offset += netlink_export_pad(data + offset, + e->value, e); + } else if (i->etype == EXPR_PREFIX) { + if (is_range_end) { + mpz_t v; + + mpz_init_bitmask(v, i->len - + i->prefix_len); + mpz_add(v, i->prefix->value, v); + offset += netlink_export_pad(data + + offset, + v, i); + mpz_clear(v); + continue; + } + + offset += netlink_export_pad(data + offset, + i->prefix->value, + i); + } else { + assert(i->etype == EXPR_VALUE); + + offset += netlink_export_pad(data + offset, + i->value, i); + } } memcpy(nld->value, data, len); @@ -247,13 +287,14 @@ static void netlink_gen_verdict(const struct expr *expr, } } -void netlink_gen_data(const struct expr *expr, struct nft_data_linearize *data) +void netlink_gen_data(const struct expr *expr, struct nft_data_linearize *data, + int end) { switch (expr->etype) { case EXPR_VALUE: return netlink_gen_constant_data(expr, data); case EXPR_CONCAT: - return netlink_gen_concat_data(expr, data); + return netlink_gen_concat_data(expr, data, end); case EXPR_VERDICT: return netlink_gen_verdict(expr, data); default: @@ -712,8 +753,14 @@ void alloc_setelem_cache(const struct expr *set, struct nftnl_set *nls) const struct expr *expr; list_for_each_entry(expr, &set->expressions, list) { - nlse = alloc_nftnl_setelem(set, expr); + nlse = alloc_nftnl_setelem(set, expr, 0); nftnl_set_elem_add(nls, nlse); + + if (set->set_flags & NFT_SET_SUBKEY) { + nlse = alloc_nftnl_setelem(set, expr, 1); + nftnl_set_elem_add(nls, nlse); + } + } } @@ -907,15 +954,16 @@ int netlink_list_setelems(struct netlink_ctx *ctx, const struct handle *h, set->init = set_expr_alloc(&internal_location, set); nftnl_set_elem_foreach(nls, list_setelem_cb, ctx); - if (!(set->flags & NFT_SET_INTERVAL)) + if (set->flags & NFT_SET_SUBKEY) + concat_range_aggregate(set->init); + else if (set->flags & NFT_SET_INTERVAL) + interval_map_decompose(set->init); + else list_expr_sort(&ctx->set->init->expressions); nftnl_set_free(nls); ctx->set = NULL; - if (set->flags & NFT_SET_INTERVAL) - interval_map_decompose(set->init); - return 0; } @@ -924,6 +972,7 @@ int netlink_get_setelem(struct netlink_ctx *ctx, const struct handle *h, struct set *set, struct expr *init) { struct nftnl_set *nls, *nls_out = NULL; + int err = 0; nls = nftnl_set_alloc(); if (nls == NULL) @@ -947,18 +996,18 @@ int netlink_get_setelem(struct netlink_ctx *ctx, const struct handle *h, set->init = set_expr_alloc(loc, set); nftnl_set_elem_foreach(nls_out, list_setelem_cb, ctx); - if (!(set->flags & NFT_SET_INTERVAL)) + if (set->flags & NFT_SET_SUBKEY) + concat_range_aggregate(set->init); + else if (set->flags & NFT_SET_INTERVAL) + err = get_set_decompose(table, set); + else list_expr_sort(&ctx->set->init->expressions); nftnl_set_free(nls); nftnl_set_free(nls_out); ctx->set = NULL; - if (set->flags & NFT_SET_INTERVAL && - get_set_decompose(table, set) < 0) - return -1; - - return 0; + return err; } void netlink_dump_obj(struct nftnl_obj *nln, struct netlink_ctx *ctx) diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c index 498326d0..ef696336 100644 --- a/src/netlink_linearize.c +++ b/src/netlink_linearize.c @@ -393,10 +393,10 @@ static void netlink_gen_range(struct netlink_linearize_ctx *ctx, nle = alloc_nft_expr("range"); netlink_put_register(nle, NFTNL_EXPR_RANGE_SREG, sreg); nftnl_expr_set_u32(nle, NFTNL_EXPR_RANGE_OP, NFT_RANGE_NEQ); - netlink_gen_data(range->left, &nld); + netlink_gen_data(range->left, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_RANGE_FROM_DATA, nld.value, nld.len); - netlink_gen_data(range->right, &nld); + netlink_gen_data(range->right, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_RANGE_TO_DATA, nld.value, nld.len); nftnl_rule_add_expr(ctx->nlr, nle); @@ -407,7 +407,7 @@ static void netlink_gen_range(struct netlink_linearize_ctx *ctx, netlink_put_register(nle, NFTNL_EXPR_CMP_SREG, sreg); nftnl_expr_set_u32(nle, NFTNL_EXPR_CMP_OP, netlink_gen_cmp_op(OP_GTE)); - netlink_gen_data(range->left, &nld); + netlink_gen_data(range->left, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_CMP_DATA, nld.value, nld.len); nftnl_rule_add_expr(ctx->nlr, nle); @@ -415,7 +415,7 @@ static void netlink_gen_range(struct netlink_linearize_ctx *ctx, netlink_put_register(nle, NFTNL_EXPR_CMP_SREG, sreg); nftnl_expr_set_u32(nle, NFTNL_EXPR_CMP_OP, netlink_gen_cmp_op(OP_LTE)); - netlink_gen_data(range->right, &nld); + netlink_gen_data(range->right, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_CMP_DATA, nld.value, nld.len); nftnl_rule_add_expr(ctx->nlr, nle); break; @@ -446,7 +446,7 @@ static void netlink_gen_flagcmp(struct netlink_linearize_ctx *ctx, mpz_init_set_ui(zero, 0); netlink_gen_raw_data(zero, expr->right->byteorder, len, &nld); - netlink_gen_data(expr->right, &nld2); + netlink_gen_data(expr->right, &nld2, 0); nle = alloc_nft_expr("bitwise"); netlink_put_register(nle, NFTNL_EXPR_BITWISE_SREG, sreg); @@ -529,7 +529,7 @@ static void netlink_gen_relational(struct netlink_linearize_ctx *ctx, netlink_put_register(nle, NFTNL_EXPR_CMP_SREG, sreg); nftnl_expr_set_u32(nle, NFTNL_EXPR_CMP_OP, netlink_gen_cmp_op(expr->op)); - netlink_gen_data(right, &nld); + netlink_gen_data(right, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_CMP_DATA, nld.value, len); release_register(ctx, expr->left); @@ -662,7 +662,7 @@ static void netlink_gen_immediate(struct netlink_linearize_ctx *ctx, nle = alloc_nft_expr("immediate"); netlink_put_register(nle, NFTNL_EXPR_IMM_DREG, dreg); - netlink_gen_data(expr, &nld); + netlink_gen_data(expr, &nld, 0); switch (expr->etype) { case EXPR_VALUE: nftnl_expr_set(nle, NFTNL_EXPR_IMM_DATA, nld.value, nld.len); @@ -766,7 +766,7 @@ static void netlink_gen_objref_stmt(struct netlink_linearize_ctx *ctx, expr->mappings->set->handle.set_id); break; case EXPR_VALUE: - netlink_gen_data(stmt->objref.expr, &nld); + netlink_gen_data(stmt->objref.expr, &nld, 0); nftnl_expr_set(nle, NFTNL_EXPR_OBJREF_IMM_NAME, nld.value, nld.len); nftnl_expr_set_u32(nle, NFTNL_EXPR_OBJREF_IMM_TYPE, diff --git a/src/parser_bison.y b/src/parser_bison.y index 3f283256..2b718971 100644 --- a/src/parser_bison.y +++ b/src/parser_bison.y @@ -3554,7 +3554,6 @@ range_rhs_expr : basic_rhs_expr DASH basic_rhs_expr multiton_rhs_expr : prefix_rhs_expr | range_rhs_expr - | wildcard_expr ; map_expr : concat_expr MAP rhs_expr @@ -3648,7 +3647,7 @@ set_elem_option : TIMEOUT time_spec ; set_lhs_expr : concat_rhs_expr - | multiton_rhs_expr + | wildcard_expr ; set_rhs_expr : concat_rhs_expr @@ -3901,7 +3900,7 @@ list_rhs_expr : basic_rhs_expr COMMA basic_rhs_expr ; rhs_expr : concat_rhs_expr { $$ = $1; } - | multiton_rhs_expr { $$ = $1; } + | wildcard_expr { $$ = $1; } | set_expr { $$ = $1; } ; @@ -3941,7 +3940,24 @@ basic_rhs_expr : inclusive_or_rhs_expr ; concat_rhs_expr : basic_rhs_expr - | concat_rhs_expr DOT basic_rhs_expr + | multiton_rhs_expr + | concat_rhs_expr DOT multiton_rhs_expr + { + if ($$->etype != EXPR_CONCAT) { + $$ = concat_expr_alloc(&@$); + compound_expr_add($$, $1); + } else { + struct location rhs[] = { + [1] = @2, + [2] = @3, + }; + location_update(&$3->location, rhs, 2); + $$ = $1; + $$->location = @$; + } + compound_expr_add($$, $3); + } + | concat_rhs_expr DOT basic_rhs_expr { if ($$->etype != EXPR_CONCAT) { $$ = concat_expr_alloc(&@$); @@ -3952,7 +3968,6 @@ concat_rhs_expr : basic_rhs_expr [2] = @3, }; location_update(&$3->location, rhs, 2); - $$ = $1; $$->location = @$; } diff --git a/src/rule.c b/src/rule.c index 4abc13c9..377781b1 100644 --- a/src/rule.c +++ b/src/rule.c @@ -1526,6 +1526,7 @@ static int do_add_setelems(struct netlink_ctx *ctx, struct cmd *cmd, set = set_lookup(table, h->set.name); if (set->flags & NFT_SET_INTERVAL && + !(set->flags & NFT_SET_SUBKEY) && set_to_intervals(ctx->msgs, set, init, true, ctx->nft->debug_mask, set->automerge, &ctx->nft->output) < 0) @@ -1541,6 +1542,7 @@ static int do_add_set(struct netlink_ctx *ctx, const struct cmd *cmd, if (set->init != NULL) { if (set->flags & NFT_SET_INTERVAL && + !(set->flags & NFT_SET_SUBKEY) && set_to_intervals(ctx->msgs, set, set->init, true, ctx->nft->debug_mask, set->automerge, &ctx->nft->output) < 0) @@ -1618,15 +1620,15 @@ static int do_command_insert(struct netlink_ctx *ctx, struct cmd *cmd) static int do_delete_setelems(struct netlink_ctx *ctx, struct cmd *cmd) { - struct handle *h = &cmd->handle; struct expr *expr = cmd->expr; + struct handle *h = &cmd->handle; struct table *table; struct set *set; table = table_lookup(h, &ctx->nft->cache); set = set_lookup(table, h->set.name); - if (set->flags & NFT_SET_INTERVAL && + if (set->flags & NFT_SET_INTERVAL && !(set->flags & NFT_SET_SUBKEY) && set_to_intervals(ctx->msgs, set, expr, false, ctx->nft->debug_mask, set->automerge, &ctx->nft->output) < 0) @@ -2480,7 +2482,7 @@ static int do_get_setelems(struct netlink_ctx *ctx, struct cmd *cmd, set = set_lookup(table, cmd->handle.set.name); /* Create a list of elements based of what we got from command line. */ - if (set->flags & NFT_SET_INTERVAL) + if (set->flags & NFT_SET_INTERVAL && !(set->flags & NFT_SET_SUBKEY)) init = get_set_intervals(set, cmd->expr); else init = cmd->expr; @@ -2493,7 +2495,7 @@ static int do_get_setelems(struct netlink_ctx *ctx, struct cmd *cmd, if (err >= 0) __do_list_set(ctx, cmd, table, new_set); - if (set->flags & NFT_SET_INTERVAL) + if (set->flags & NFT_SET_INTERVAL && !(set->flags & NFT_SET_SUBKEY)) expr_free(init); set_free(new_set); diff --git a/src/segtree.c b/src/segtree.c index 9f1eecc0..e49576bc 100644 --- a/src/segtree.c +++ b/src/segtree.c @@ -652,6 +652,11 @@ struct expr *get_set_intervals(const struct set *set, const struct expr *init) set_elem_add(set, new_init, i->key->value, i->flags, i->byteorder); break; + case EXPR_CONCAT: + compound_expr_add(new_init, expr_clone(i)); + i->flags |= EXPR_F_INTERVAL_END; + compound_expr_add(new_init, expr_clone(i)); + break; default: range_expr_value_low(low, i); set_elem_add(set, new_init, low, 0, i->byteorder); @@ -823,6 +828,9 @@ static int expr_value_cmp(const void *p1, const void *p2) struct expr *e2 = *(void * const *)p2; int ret; + if (expr_value(e1)->etype == EXPR_CONCAT) + return -1; + ret = mpz_cmp(expr_value(e1)->value, expr_value(e2)->value); if (ret == 0) { if (e1->flags & EXPR_F_INTERVAL_END) @@ -834,6 +842,132 @@ static int expr_value_cmp(const void *p1, const void *p2) return ret; } +/* Given start and end elements of a range, check if it can be represented as + * a single netmask, and if so, how long, by returning a zero or positive value. + */ +static int range_mask_len(mpz_t start, mpz_t end, unsigned int len) +{ + unsigned int step = 0, i; + mpz_t base, tmp; + int masks = 0; + + mpz_init_set_ui(base, mpz_get_ui(start)); + + while (mpz_cmp(base, end) <= 0) { + step = 0; + while (!mpz_tstbit(base, step)) { + mpz_init_set_ui(tmp, mpz_get_ui(base)); + for (i = 0; i <= step; i++) + mpz_setbit(tmp, i); + if (mpz_cmp(tmp, end) > 0) { + mpz_clear(tmp); + break; + } + mpz_clear(tmp); + + step++; + + if (step >= len) + goto out; + } + + if (masks++) + goto out; + + mpz_add_ui(base, base, 1 << step); + } + +out: + mpz_clear(base); + + if (masks > 1) + return -1; + return len - step; +} + +/* Given a set with two elements (start and end), transform them into a + * concatenation of ranges. That is, from a list of start expressions and a list + * of end expressions, form a list of start - end expressions. + */ +void concat_range_aggregate(struct expr *set) +{ + struct expr *i, *start = NULL, *end, *r1, *r2, *next, *r1_next, *tmp; + struct list_head *r2_next; + int prefix_len, free_r1; + mpz_t range, p; + + list_for_each_entry_safe(i, next, &set->expressions, list) { + if (!start) { + start = i; + continue; + } + end = i; + + /* Walk over r1 (start expression) and r2 (end) in parallel, + * form ranges between corresponding r1 and r2 expressions, + * store them by replacing r2 expressions, and free r1 + * expressions. + */ + r2 = list_first_entry(&expr_value(end)->expressions, + struct expr, list); + list_for_each_entry_safe(r1, r1_next, + &expr_value(start)->expressions, + list) { + mpz_init(range); + mpz_init(p); + + r2_next = r2->list.next; + free_r1 = 0; + + if (!mpz_cmp(r1->value, r2->value)) { + free_r1 = 1; + goto next; + } + + mpz_sub(range, r2->value, r1->value); + mpz_sub_ui(range, range, 1); + mpz_and(p, r1->value, range); + + /* Check if we are forced, or if it's anyway preferable, + * to express the range as two points instead of a + * netmask. + */ + prefix_len = range_mask_len(r1->value, r2->value, + r1->len); + if (prefix_len < 0 || + !(r1->dtype->flags & DTYPE_F_PREFIX)) { + tmp = range_expr_alloc(&r1->location, r1, + r2); + + list_replace(&r2->list, &tmp->list); + r2_next = tmp->list.next; + } else { + tmp = prefix_expr_alloc(&r1->location, r1, + prefix_len); + tmp->len = r2->len; + + list_replace(&r2->list, &tmp->list); + r2_next = tmp->list.next; + expr_free(r2); + } + +next: + mpz_clear(p); + mpz_clear(range); + + r2 = list_entry(r2_next, typeof(*r2), list); + compound_expr_remove(start, r1); + + if (free_r1) + expr_free(r1); + } + + compound_expr_remove(set, start); + expr_free(start); + start = NULL; + } +} + void interval_map_decompose(struct expr *set) { struct expr **elements, **ranges; From patchwork Tue Nov 19 01:07:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Brivio X-Patchwork-Id: 1197073 X-Patchwork-Delegate: pablo@netfilter.org Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Tue, 19 Nov 2019 01:07:20 +0000 (UTC) From: Stefano Brivio To: Pablo Neira Ayuso , netfilter-devel@vger.kernel.org Cc: Florian Westphal , =?utf-8?q?Kadlecsik_J=C3=B3zsef?= , Eric Garver , Phil Sutter Subject: [PATCH nft 3/3] tests: Introduce test for set with concatenated ranges Date: Tue, 19 Nov 2019 02:07:12 +0100 Message-Id: <20191119010712.39316-4-sbrivio@redhat.com> In-Reply-To: <20191119010712.39316-1-sbrivio@redhat.com> References: <20191119010712.39316-1-sbrivio@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: D8PHff3ROGua8RIAnlGnNA-1 X-Mimecast-Spam-Score: 0 Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org This test checks that set elements can be added, deleted, that addition and deletion are refused when appropriate, that entries time out properly and they can be fetched by matching values in the given ranges. Signed-off-by: Stefano Brivio --- .../testcases/sets/0038concatenated_ranges_0 | 162 ++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100755 tests/shell/testcases/sets/0038concatenated_ranges_0 diff --git a/tests/shell/testcases/sets/0038concatenated_ranges_0 b/tests/shell/testcases/sets/0038concatenated_ranges_0 new file mode 100755 index 00000000..7dfab83e --- /dev/null +++ b/tests/shell/testcases/sets/0038concatenated_ranges_0 @@ -0,0 +1,162 @@ +#!/bin/sh -e +# +# 0038concatenated_ranges_0 - Add, get, list, timeout for concatenated ranges +# +# Cycle over supported data types, forming concatenations of three fields, for +# all possible permutations, and: +# - add entries to set +# - list them +# - check that they can't be added again +# - get entries by specifying a value matching ranges for all fields +# - delete them +# - add them with 1s timeout +# - check that they can't be added again right away +# - check that they are not listed after 1s +# - delete them +# - make sure they can't deleted again + +TYPES="ipv4_addr ipv6_addr ether_addr inet_proto inet_service mark" + +RULESPEC_ipv4_addr="ip saddr" +ELEMS_ipv4_addr="192.0.2.1 198.51.100.0/25 203.0.113.0-203.0.113.129" +ADD_ipv4_addr="192.0.2.252/31" +GET_ipv4_addr="198.51.100.127 198.51.100.0/25" + +RULESPEC_ipv6_addr="ip6 daddr" +ELEMS_ipv6_addr="2001:db8:c0c:c0de::1-2001:db8:cacc::a 2001:db8::1 2001:db8:dada:da::-2001:db8:dada:da:ffff:ffff:ffff:ffff" +ADD_ipv6_addr="2001:db8::d1ca:d1ca" +GET_ipv6_addr="2001:db8::1 2001:db8::1" + +RULESPEC_ether_addr="ether saddr" +ELEMS_ether_addr="00:0a:c1:d1:f1:ed-00:0a:c1:dd:ec:af 00:0b:0c:ca:cc:10-c1:a0:c1:cc:10:00 f0:ca:cc:1a:b0:1a" +ADD_ether_addr="00:be:1d:ed:ab:e1" +GET_ether_addr="ac:c1:ac:c0:ce:c0 00:0b:0c:ca:cc:10-c1:a0:c1:cc:10:00" + +RULESPEC_inet_proto="meta l4proto" +ELEMS_inet_proto="tcp udp icmp" +ADD_inet_proto="sctp" +GET_inet_proto="udp udp" + +RULESPEC_inet_service="tcp dport" +ELEMS_inet_service="22-23 1024-32768 31337" +ADD_inet_service="32769-65535" +GET_inet_service="32768 1024-32768" + +RULESPEC_mark="mark" +ELEMS_mark="0x00000064-0x000000c8 0x0000006f 0x0000fffd-0x0000ffff" +ADD_mark="0x0000002a" +GET_mark="0x0000006f 0x0000006f" + +tmp="$(mktemp)" +trap "rm -f ${tmp}" EXIT + +render() { + eval "echo \"$(cat ${1})\"" +} + +cat <<'EOF' > "${tmp}" +flush ruleset + +table inet filter { + set test { + type ${ta} . ${tb} . ${tc} + flags interval,timeout + elements = { ${a1} . ${b1} . ${c1} , + ${a2} . ${b2} . ${c2} , + ${a3} . ${b3} . ${c3} } + } + + chain output { + type filter hook output priority 0; policy accept; + ${sa} . ${sb} . ${sc} @test counter + } +} +EOF + +for ta in ${TYPES}; do + eval a=\$ELEMS_${ta} + a1=${a%% *}; a2=$(expr "$a" : ".* \(.*\) .*"); a3=${a##* } + eval sa=\$RULESPEC_${ta} + + for tb in ${TYPES}; do + [ "${tb}" = "${ta}" ] && continue + if [ "${tb}" = "ipv6_addr" ]; then + [ "${ta}" = "ipv4_addr" ] && continue + elif [ "${tb}" = "ipv4_addr" ]; then + [ "${ta}" = "ipv6_addr" ] && continue + fi + + eval b=\$ELEMS_${tb} + b1=${b%% *}; b2=$(expr "$b" : ".* \(.*\) .*"); b3=${b##* } + eval sb=\$RULESPEC_${tb} + + for tc in ${TYPES}; do + [ "${tc}" = "${ta}" ] && continue + [ "${tc}" = "${tb}" ] && continue + if [ "${tc}" = "ipv6_addr" ]; then + [ "${ta}" = "ipv4_addr" ] && continue + [ "${tb}" = "ipv4_addr" ] && continue + elif [ "${tc}" = "ipv4_addr" ]; then + [ "${ta}" = "ipv6_addr" ] && continue + [ "${tb}" = "ipv6_addr" ] && continue + fi + + eval c=\$ELEMS_${tc} + c1=${c%% *}; c2=$(expr "$c" : ".* \(.*\) .*"); c3=${c##* } + eval sc=\$RULESPEC_${tc} + + render ${tmp} | ${NFT} -f - + + [ $(${NFT} list set inet filter test | \ + grep -c -e "${a1} . ${b1} . ${c1}" \ + -e "${a2} . ${b2} . ${c2}" \ + -e "${a3} . ${b3} . ${c3}") -eq 3 ] + + ! ${NFT} add element inet filter test \ + "{ ${a1} . ${b1} . ${c1} }" 2>/dev/null + ! ${NFT} add element inet filter test \ + "{ ${a2} . ${b2} . ${c2} }" 2>/dev/null + ! ${NFT} add element inet filter test \ + "{ ${a3} . ${b3} . ${c3} }" 2>/dev/null + + ${NFT} delete element inet filter test \ + "{ ${a1} . ${b1} . ${c1} }" + ! ${NFT} delete element inet filter test \ + "{ ${a1} . ${b1} . ${c1} }" 2>/dev/null + + eval add_a=\$ADD_${ta} + eval add_b=\$ADD_${tb} + eval add_c=\$ADD_${tc} + ${NFT} add element inet filter test \ + "{ ${add_a} . ${add_b} . ${add_c} timeout 1s}" + [ $(${NFT} list set inet filter test | \ + grep -c "${add_a} . ${add_b} . ${add_c}") -eq 1 ] + ! ${NFT} add element inet filter test \ + "{ ${add_a} . ${add_b} . ${add_c} timeout 1s}" \ + 2>/dev/null + + eval get_a=\$GET_${ta} + eval get_b=\$GET_${tb} + eval get_c=\$GET_${tc} + exp_a=${get_a##* }; get_a=${get_a%% *} + exp_b=${get_b##* }; get_b=${get_b%% *} + exp_c=${get_c##* }; get_c=${get_c%% *} + [ $(${NFT} get element inet filter test \ + "{ ${get_a} . ${get_b} . ${get_c} }" | \ + grep -c "${exp_a} . ${exp_b} . ${exp_c}") -eq 1 ] + + sleep 1 + [ $(${NFT} list set inet filter test | \ + grep -c "${add_a} . ${add_b} . ${add_c}") -eq 0 ] + + ${NFT} delete element inet filter test \ + "{ ${a2} . ${b2} . ${c2} }" + ${NFT} delete element inet filter test \ + "{ ${a3} . ${b3} . ${c3} }" + ! ${NFT} delete element inet filter test \ + "{ ${a2} . ${b2} . ${c2} }" 2>/dev/null + ! ${NFT} delete element inet filter test \ + "{ ${a3} . ${b3} . ${c3} }" 2>/dev/null + done + done +done